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Acoplamento e interação modal em painéis cilíndricos imperfeitos e simplesmente apoiados
(Universidade Federal de Goiás, 2019-08-30) Silva, Wanclaine Almeida Vaz da; Silva, Frederico Martins Alves da; http://lattes.cnpq.br/9929132527197884; Silva, Frederíco Martins Alves da; Nuñez del Prado, Zenón José Guzmán; Orlando, Diego
Internal resonance is one of the main areas of research in the field of nonlinear dynamics. This phenomenon occurs when the proportion of the natural frequencies of distinct vibration modes is an integer, and the internal resonance allows the exchange of energy between the vibration modes involved, influencing the stability of the dynamic responses. In this work deals the analyses of linear and nonlinear free and forced vibrations of a simply supported cylindrical panel, subjected to a time dependent transverse loading, considering the modal coupling and modal interaction phenomena in the proposed modal solution for the transversal displacement field. The transversal equations of motion are obtained through an energetic approach using the deformation field and mean surface curvature changes given by Donnell's nonlinear theory for shallow shells. The system of nonlinear partial differential equations is determined by minimizing the Lagrangian energy of structural system. From classical vibration modes, an analysis of free vibrations is performed to determine the geometries that generate modal interaction between two or three distinct vibration modes, it is noteworthy that the geometries found in this dissertation have internal resonances of the type: 1: 1, 1: 2, 1: 3, 1: 1: 2 and 1: 2: 4. The proposed modal solution for the transversal displacement field is achieved by employing the perturbation method, considering in the initial modal solution the existing modal interaction between the two or three distinct vibration modes. From the Galerkin method, nonlinear partial differential equations are discretized giving rise to a system of nonlinear ordinary differential equations. The results of nonlinear free vibrations of a perfect cylindrical panel, or with a geometric imperfection in the form of one of the modes of vibration present in the modal solution for transverse displacements, are expressed as a function of the number of degrees of freedom considered in the modal solution the transverse displacement field. It is also made an analyse of the forced vibrations, determining the resonance curves, the basin of attraction, phase planes and mapping the Poincaré section of the perfect and imperfect cylindrical panel. Thus, it can be observed that the shape and magnitude of the initial geometric imperfections have a great influence on the nonlinear responses of both free and forced vibrations.
Acúmulo e carreamento de metais pesados e sólidos em superfícies asfálticas
(Universidade Federal de Goiás, 2014-03-14) Silva, Emanoelle Pereira da; Siqueira, Eduardo Queija de; http://lattes.cnpq.br/8130881429925800; Siqueira, Eduardo Queija de; Milograna, Jussanã; Poleto, Cristiano
This work aimed to quantify the build-up and wash-off pollutants in urban asphalt surfaces, mainly metals and solids, correlating the pollutant load with dry days, traffic load and rainfall intensity. The relationship between metals and particle size has been also evaluated. To do this, three streets with different traffic load as study area in Goiânia City were selected. The sediments samples were collected in six plots of 0,5 m² located in the central track of the streets during 14 days, collecting samples on 1°, 2°, 3°, 5°, 7° e 14° dry days by the vacuuming and sweeping method. For water sampling two rainfall intensities were selected to be simulated, through a simulated rainfall over an area of 3m², being on low and other high intensity, respectively 25 mm/h and 115 mm/h both with 15 minutes duration. Were simulated three events on the same experimental plot in witch study area and collected 5 water samples during witch rainfall event, which were analyzed by concentration of suspend and dissolved solids, DQO, conductivity and the metals copper, chromium, lead, cadmium, zinc, iron and manganese, determined by Atomic Absorption Spectroscopy. The results showed that build-up has a strong direct relationship with dray days and an inverse relationship with traffic load. For metals in sediments was verified that the higher concentrations are on particles < 63μm, and follow in general the concentration order Fe > Mn > Cu > Pb > Zn > Cd > Cr. The runoff water quality was observed that all the parameters analyzed, except chromium, were detected on selected study areas. The influence of rainfall intensity on wash-off pollutants was observed that this has fundamental importance, so that higher intensity wash-off a higher mass of solids and metals.
Acúmulo e carreamento de poluentes em superfície de estacionamento
(Universidade Federal de Goiás, 2012-09-21) Pauletti, Luciana Inácio; Siqueira, Eduardo Queija de; http://lattes.cnpq.br/8130881429925800; Siqueira, Eduardo Queija de; Kopp, Kátia Alcione; Andrade Neto, Cícero Onofre de
The stormwater runoff in urban areas is an important source of non-point pollutants. This study aimed to quantify the build-up and wash-off of pollutants, particularly metals, water runoff from a paved surface urban Goiânia. Studies to estimate the processes of build-up and wash-off are still incipient in Brazil. We evaluated twelve plots paved with size of 3m2, located in a public parking lot, where they were analyzed on build-up and wash-off in June and July 2012. To wash-off was used a rainfall simulator in three intensities, 69 mm/h, 109 mm/h and 180 mm/h. Quantitation of accumulation in sampled surfaces determined load per m2 to obtain the coefficient build-up as well as for the analysis of the influence of background dried days before sampling campaigns. The build-up was adjusted at four possible equations for use in models water quality: (1) Linear, (2) Power (3) Exponential, and (4) Michaelis-Menton by obtaining the best fit. The water quality parameters analyzed were used for calculation of Average Concentration Event (CME), building polutogramas, coefficient of wash-off and correlation analyzes. The accumulation rate obtained was, on average, 8.53 g/m2dia, and more days dry, the greater the accumulation of pollutants. Levels of metals were found in all analyzed plots for all simulated events in different periods. There sharp and direct correlation between variables, particularly suspended solids and metals. The intensity of rain on the wash-off was clear, since the simulated rain intensity shifted with greater dirtier. Parameters were obtained for modeling the quality of rainwater.
Adição de resíduo de argamassas mistas na produção de tijolos modulares de solo-cimento
(Universidade Federal de Goiás, 2008) Rodrigues, Mayza Loureiro Araújo; Ferreira, Regis; http://lattes.cnpq.br/3206688887219284; Bacarji, Edgar; http://lattes.cnpq.br/3206688887219284
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Análise da consistência de dados hidrológicos a partir de diferentes modelos digitais de terreno
(Universidade Federal de Goiás, 2015-02-20) Ribeiro, Hugo José; Milograna, Jussanã; Ferreira, Nilson Clementino; http://lattes.cnpq.br/6466969611652630; Ferreira, Nilson Clementino; Milograna, Jussanã; Araújo, José Vicente Granato de; Boggione, Giovanni de Araújo
In the digital relief is best represented by the digital terrain model (DTM) and the automatic extraction from topographical parameters of this data type, configures a viable alternative in relation to the manual process performed on topographic maps. However, the available data may contain faults or present information to altitude that are not exactly the terrain. In this sense, it is important to consider these issues in the application of MDT. In hydrology, for example, you must perform preprocessing steps to eliminate inconsistencies that might prevent the natural reproduction of the flow of water toward the riverbeds. The objective of this research is to check the limits of applicability of the MDTs in hydrological analyses. For this, we used 5 (five) MDTs data: Light Detection And Ranging-LIDAR; Aerial Photography; Topodata; ASTER Global Digital Elevation Model-Aster GDEM; Shuttle Radar Topography Mission-SRTM, with different spatial resolutions and methods of acquisition. These data were applied a technique of hydrological correction and subsequently were extracted attributes from all surfaces. This information was used in the construction of the time of concentration and consequently the design hydrographs, which in turn were used to extract the maximum flow of project to return periods of 5, 10, 15, 20, 25, 50 and 100 years, in a range of the curve number (CN) varying between 40 and 99. It was built using a programming language of 60 dimension array rows by 7 columns, where each line represents the maximum values of each design hydrograph flow generated from each value of CN. In the end, it was obtained a set of 24 arrays containing the values of the maximum flows of project for each CN value, and attributes extracted of the MDTs and of digital models of terrain Hidrologicamente Consistent (MDEHCs). In possession of this information, a statistical test was applied in order to assess the influence that the hydrological consistency method and the dimensions of the cells of the MDTs/MDEHCs had about the project flows. Was observed in one of the sub-basins analysed that the difference between the maximum design flow is directly proportional to the increase in CN and payback period. It was noted a difference of up to 173.7 m3/s to a CN of 99 and return period of 100 years. The hypothesis H0 of the proposed test was accepted in all return periods both in relation to hydrological consistency method applied as compared to cell dimension of MDTs. This means that it is possible to affirm with an error probability of "P-value" for return period, which the flows generated from the parameters of the MDTs differ from flows generated from the parameters of MDEHCs as well as between the MDTs surveyed at a significance level of 5%. From the results, it might be concluded that the interpolation method for hydrological consistency and size of the cell of the MDTs has influence on the generation of the maximum flow of project.
Análise da deformabilidade do fosfogesso
(Universidade Federal de Goiás, 2014-07-02) Chagas, Juliana Verônica Ribeiro das; Mascarenha, Márcia Maria dos Anjos; Rezende, Lilian Ribeiro de; http://lattes.cnpq.br/9258692609398794; Rezende, Lilian Ribeiro de; Sales, Maurício Martins; Boscov, Maria Eugênia Gimenez
The phosphogypsum, a by-product from the production of phosphoric acid, requires the availability of large areas for its storage, representing a problem for the industries of fertilizers, both economically and environmentally. Therefore, there is a need to search for alternative applications of phosphogypsum in order to minimize the impacts of its deposition. Several studies were performed to verify the possibility of using phosphogypsum in geotechnical works, which showed promising results. However, the deformability of this material can be a limiting factor for their use. Thus, one of the main objectives of this study was to analyse the evolution of deformation over time of the phosphogypsum, soil and a mixture containing 10% of phosphogypsum and 90% of soil (mixture A). Furthermore, this study also analysed the deformability of these materials when they are not saturated, which is the natural condition in which they are used. The phosphogypsum was collected in a phosphate fertilizers industry, called Anglo American, in the city of Catalão, Goiás, and the soil was collected in Aparecida de Goiânia, Goiás. For the analysis of deformation over time, consolidation tests were performed with different loading times (48 hours, 7 days and 15 days) on samples in saturated condition. After the consolidation tests, others tests were conducted in order to give a better understanding of the results, such as: X-Ray diffraction, permeability, scanning electron microscopy (SEM) and tests to obtain the water retention curve using the equipment WP4C (Dewpoint PotentiaMeter). For the analysis of the deformation in unsaturated condition, consolidation tests in unsaturated conditions and tests of water content control were performed in the soil, phosphogypsum and mixture A (10% phosphogypsum + 90% soil). The results show no stabilizing of the deformation over time of the mixture A and the phosphogypsum. Furthermore, the increase of the deformation due only to the secondary compression expected for a period of five years is approximately 0.5% for the soil, 1.4% for the mixture A and 15.5% for the phosphogypsum. It has been found by granulometry tests that the deformations occur due to the breakage of the grains of phosphogypsum. It is noteworthy that no mineralogical change occurs, as observed by X-ray diffraction. Furthermore, it was verified with the unsaturated consolidation tests that a slight variation of suction occurs during the test, but this variation influenced more the deformability of the phosphogypsum than of the soil and mixture A. Thus, it was concluded that the deformation limits the use of phosphogypsum or mixtures of phosphogypsum and soil in geotechnical works.
Análise da dispersão de poluentes de origem veicular na BR-153 e sua relação com o uso do solo em área urbana do município de Goiânia
(Universidade Federal de Goiás, 2014-04-25) Reis, Adriano Francisco dos; Godói, Emiliano Lôbo de; Hora, Karla Emmanuela Ribeiro; http://lattes.cnpq.br/6451685640638572; Hora, Karla Emmanuela Ribeiro; Godoi, Emiliano Lôbo de; Siqueira, Eduardo Queija de; Silva Júnior, Sílvio Barbosa da
The BR-153 is 15 kilometers long within Goiânia city, therefore, the evaluation of the levels of air pollution and noise related to the presence of the highway is an object of considerable importance. To this end, the situation in three variables related to environmental degradation was analyzed: the airborne particulate matter mass (PM) adsorbed on the leaf surface, the metals concentration presents in PM and the intensity of sound pressure. Due owning urban parameters that apply mostly in built macrozone - density basic standard - the region of Setor Morais and Vila Morais have been chosen to perform the measurements and the collections, which were done to both highway sides as for distant points, with the goal to make the dispersion analysis of such pollutants. The PM was collected from the leaves surface of seven copies of monguba (Pachira aquatica), which are found at different distances from the highway axis: near the axis and at 100, 200 and 300 meters from the track, on both sides; the metals concentration data were obtained from analysis by atomic absorption. Data on noise pollution were collected at four points: 13, 50, 150 and 300 m from the highway axis, along a cross-street, using type 2 sound level meter - the data analysis was performed with reference to the parameters set by NBR 10.151 for noise comfort. The collections and the measurements were made from July to December 2013, accompanied by checks climatic parameters in order to determine the influence of these parameters on the dispersion of possible pollutants. The highest value related to PM was 19.1 μg/mm2 of leaf surface, detected in September. No significant differences were observed in the mass PM and the metal concentration in the leaves of different trees. There was a decrease in the mass of PM with the highest rainfall, but for Zn, Ni and Fe concentrations, a higher concentration was observed in the rainy season. As for the sound pressure, nonconformity with acoustic comfort levels near the highway was observed, wherein the level reached 80.3 dB (A) on two occasions. For furthermost points - at 150 and 300 m - was observed that possible shortcoming is due mainly to noise sources locations. This work suggests revision of the land use allowed in the study area, associated with the change in the type of highway traffic to ensure to ensure less risk of environmental degradation to the population.
Análise da eficiência de métodos de controle de Enchentes na atenuação de picos de cheias utilizando o modelo computacional SWMM Storm Water managemente model
(Universidade Federal de Goiás, 2007-08-31) SILVA, Karla Alcione da; FORMIGA, Klebber Teodomiro Martins; http://lattes.cnpq.br/7889484406721543
This research presents an evaluation of the eficiency of four flood control measures applied to an urban basin in the city of Goiânia, State of Goiás, Brazil. Goiânia shows frequent flooding problems. The following factors have been identified as causes of the floodings: (1) significant number of impervious areas (2) lack of green areas, (3) insuficient capacity of the pipe network to convey the produced water volume. Small detention basins, infiltration trenches and the increase of permeable areas (30-50%) within parcels have been evaluated as flood control measures as well as the use of the Lago do Bosque dos Buritis as a detention basin. For this purpose, the Stormwater Management Model SWMM has been applied for evaluating 11 hypothetic management measures in the water basin. The later control measures were evaluated individually as combined. In determining the impervious area index of the studied area, field visits have been carried out, which showed high imperviousness. (86.16%). A synthetic rainfall time series, derived from the equation proposed by Costa e Brito (1999) with recurrence of 2 years, has been used in the simulations. Horton`s equation was applied to represent infiltration with parameters presented in Moura (2005). The scenario which combines the use of infiltration trenches and the increase of pervious areas to 50% has shown to be the best solution in reducing peak flow with 43% eficiency. On the other hand, the scenario using detention basins presented the smallest efficiency (3%).
Análise da estrutura porosa de materiais cimentícios por meio da interação e associação de técnicas avançadas de caracterização
(Universidade Federal de Goiás, 2019-12-20) Hilário, Hanaelly Garcia do Carmo; Carasek, Helena; http://lattes.cnpq.br/3023241186996790; Cascudo, Oswaldo; http://lattes.cnpq.br/3336749062812376; Cascudo, Oswaldo; http://lattes.cnpq.br/3336749062812376; Oliveira, Andrielli Morais de; Vieira, Janine Domingos
Cementitious materials such as concretes, mortars and pastes are naturally porous and they have a complex internal pore structure. This porosity has determining effects on the mechanical properties and durability of structures. Therefore it’s required a better understanding of the porous structure. This understanding is based on the use of techniques for measuring the porosity of cementitious materials, further analysis and interpretation of results and techniques. Thus, the objective of the present work was to analyze whether there is correlation, parallelism and complementation between the following advanced characterization techniques: Mercury Intrusion Porosimetry (MIP), Nitrogen Adsorption (BET), Nuclear Magnetic Resonance (NMR) and X-ray Computed Microtomography (μCT) when used for porosity measurement in cementitious matrices. As well as assess the responsiveness and sensitivity of these techniques through their results and output variables in relation to the various situations proposed in the dosage. The methodological steps taken to reach the objective include: the complete characterization of the materials used, the dosage of five different concretes (REF 0.40, REF 0.55, 0.55/10MK, 0.55/9SA1NS and REF 0.70 ), tests with concretes, such as: slump test, incorporated air content, compressive strength and modulus of elasticity, tests on pastes, such as: DRX; and tests on mortars: MIP, BET, NMR and μCT, for porosity studies. The results show that, depending on the range and structure of the pores, the results of BET, MIP, NMR and μCT may be more or less representative. The NMR tests captured a higher total porosity for the studied mortars. The NMR results also have good correlations with all other techniques studied, either with the whole sample scope or considering only the reference mortars. The same statement can be made for the BET technique. NMR and μCT techniques together occupy the largest pore diameter range and they have a number of similarities, in this way it is concluded that the combination of the two is the most viable.
Análise da influência do alquilbenzeno sulfonato linear (las) na agregação, sedimentação e coagulação química das nanopartículas de óxido de zinco em matriz aquosa
(Universidade Federal de Goiás, 2020-10-30) Guimarães, Dáfnis Barsanulfa Vieira; Teran, Francisco Xavier Cuba; http://lattes.cnpq.br/3433455726987770; Teran, Francisco Xavier Cuba; Cuba, Renata Medici Frayne; Santiago, Mariangela Fontes
With the widespread use of anionic surfactant alkylbezene linear sulfonate (LAS) and nanoparticles of zinc oxide (NP ZnO) it becomes probable the coexistence of both compounds in the aquatic environment, showning the importance of the present work in studying the effect of LAS in nanoparticles ZnO. This study was divided into 3 stages that consisted of analyzing the influence of LAS on aggregation, sedimentation, zero charge point (PCZ) and removal of nanoparticles in the coagulation process. The induced results that LAS influence the aggregation and sedimentation of nano-ZnO, mainly in LAS practices above 100mg / L. Sedimentation data were adjusted (R² without 0.85-0.99 interval) with a kinetic equation of first order with residual. The surfactant did not interfere significantly in the pHPCZ of the nano-ZnO, but both coagulants, ferric chloride and tannin, showed better results when the coagulation process with pH was close to the pHPCZ calculated. The presence of LAS in the suspension significantly influenced the efficiency of the coagulation process, in application of 300mg / L the removal efficiency was below the 5% evaluated at different pH and with two different coagulants. This study can contribute to demonstrate that the presence of LAS can alter the behavior of nano-ZnO and significantly reduce the efficiency of the coagulation process.
Análise da interação solo-estrutura em edifícios sobre estacas
(Universidade Federal de Goiás, 2009-10-29) ARAÚJO, Adrianne Carvalho de; SALES, Maurício Martines; http://lattes.cnpq.br/2033708685029423; PRADO, Ademir Aparecido do; http://lattes.cnpq.br/4118518363912053
The joined structure-foundation analysis of buildings is one of the studied themes of Soil- Structure Interaction (SSI). In this research, a numerical tool was developed using the Matlab program to evaluate the soil-structure interaction in buildings, where the problem has been studied in the last years, but has not became a current practice in civil engineering. The developed program, here named as AIEFE, predict the settlement using the Aoki and Lopes (1975) method, using as input data the reaction loads of building columns, calculated in any subroutine of spatial-portico analysis. The commercial program TQS was chosen as this subroutine in the present research. The found foundation settlements were converted in stiffness values and, then, inputted again in the structural analysis, predicting new settlements, but no more considering the foundations as fixed points . The method is iterative, aiming to reach the settlement (or load) convergence. Two examples of buildings supported by piled foundations were analyzed. The first one presented an almost square plant and the other one was typically rectangular. The SSI effects were analyzed in terms of column loads and also stiffness and foundations settlements during the constructive process of the 15-levels studied cases. During the construction of the first building levels, it was observed a greater load and settlement redistribution, due the lower structural stiffness. Using the foundation stiffness instead of settlement values was considered as an efficient process of convergence. It was also observed that the non-linear foundation behavior had a great influence in the structure load redistribution, even on advanced construction stages when the structure stiffness has a great value.
Análise da presença de surfactante na remoção de microplásticos por eletrocoagulação
(Universidade Federal de Goiás, 2023-06-05) Oliveira, Luísa Rodrigues de; Cuba Teran, Francisco Javier; http://lattes.cnpq.br/3433455726987770; Cuba Teran, Francisco Javier; Carissimi, Elvis; Ruggeri Júnior, Humberto Carlos
Various types of pollutants are found in effluents, which can combine to form even more toxic components or impair the treatments used in effluent purification. Among the emerging contaminants, microplastics and surfactants can be mentioned, which coexist in different types of wastewater. The present work evaluated the effects caused by the anionic surfactant LAS and nonionic Tween 20 in the removal of pristine and aged PVC microplastic, added in synthetic water, by the method of electrocoagulation with aluminum electrodes. For the experiments, a bench reactor was developed, which operated in batches and with synthetic water, in order to avoid interference from other substances. For the analyses, counting was used with the aid of a magnifying glass, gravimetry and scanning electron microscopy. The results showed that there was a reduction in the removal of plastic microparticles when surfactant was added, the only one that showed improvement was with the new microplastic in the presence of LAS at a concentration of 10 ppm. The worst removal percentages were for the concentration of 100 ppm, and when adding Tween 20 there was a decrease of 23% and 45% for pristine and aged microplastic, respectively, while for LAS the decrease was 6% and 24 %, for intact and deteriorated microplastic, respectively. Therefore, it is clear that the drop in removal was greater for degraded microplastics, both for the tests with Tween 20 and for the LAS. Comparing the decrease in removal between the two types of surfactant, it is observed that the non-ionic one reduces microplastic removal to a greater extent.
Análise das causas e do impacto financeiro de contratações adicionais em obras públicas
(Universidade Federal de Goiás, 2015-07-28) Ribeiro, Hélen Regina de Oliveira e; Brandstetter, Maria Carolina Gomes de Oliveira; http://lattes.cnpq.br/8038795637292636; Brandstetter, Maria Carolina Gomes de Oliveira; Campos, Marcus André Siqueira; Carvalho, Michele Tereza Marques
The creation of the Program - Programa de Apoio à Reestruturação e Expansão das Universidades Federais (REUNI) - together with the large represed demand, to the low number of technical and political pressure to meet deadlines, caused the Universidade Federal de Goiás (UFG) chose to outsource project design and execution of new works. The project contracting and execution of public works needs prior bidding procedure. The large volume of works and contracts raised increase in hiring additives. Although the regulatory government agencies consider the additives one of the main reasons for over invoicing and overpricing in public works, your contract can not be synonymous with public funds embezzlement. On the other hand, hiring is legitimate and additives provided by law. This study aims to make a analysis of the main factors that led to the hiring of additional services in new works construction contracts within the Universidade Federal de Goiás (UFG). The research is based on analysis of 42 new process works contracts, all for global price regime, contracted and completed between the years 2010 to 2014 and resulting from procurement modalities Pricing and Concurrency Taken. For the analysis of the justifications presented by the tax works, it was possible to identify the main factors and classify them into two parts. The first, relating the factors resulting from procedures failures of the elaboration of the basic projects, and the second, the factors linked to changes due to needs arising after contracting the work. The cauting of values and impacts corresponding to each of the factors indicated that most of the justifications of additives contracts (79,36%) is shed changes due to needs arising after contracting the work, indicating that most of the increases were carried out in accordance with the laws force for conclusion of such contracts and additives. The results achieved may assist Senior Management in the planning and distribution of resources to expand the physical space; demonstrating the impact of additives on two aspects. The analysis showed that the legality of the contracts additives met the legal requirements, and that most of the increases values have not altered the bidding modality. This analysis enabled us to verify which items had a higher incidence of contractual changes. Finally, this study opens new prospects for research related to analysis of public works budgets, aimed at continuous improvement of the project design process, hiring and supervision of public works and also contributed to the decrease in research gap in the topic.
Análise das rotas tecnológicas existentes para os resíduos sólidos urbanos no município de Cidade Ocidental/GO
(Universidade Federal de Goiás, 2014-04-30) Colvero, Diogo Appel; Pfeiffer, Simone Costa; http://lattes.cnpq.br/5657584936394145; Pfeiffer, Simone Costa; Carvalho, Eraldo Henriques de; Pasqualetto, Antônio
The treatment and final disposal of solid waste (MSW) have raised concern and been the subject of intense debate, especially after the Law nº 12.305 of 2 August of 2010 which established the National Policy of Solid Waste (BRASIL, 2010a) . This Law established that municipalities would have up to four years to give a final environmentally correct their waste, from its publication layout. However, in Goiás, only fourteen of the 246 municipalities in the state currently have a landfill licensed by the Department of the Environment and Water Resources, of Goiás State (DEWR/GO). Thinking about it, aimed a municipality in the state who possessed a system of allocation of their MSW that targets minimizing impacts to the environment. picked up Cidade Ocidental/GO, a municipality that is part of the Integrated Development Region of the Distrito Federal and Surrounding Areas (IDRSA/DF), which has two different technological routes for disposal of solid waste: the first route, part of that waste is collected selectively and sent to a central screening called Association of Workers in Recycling and Reuse of Waste (AWRRW) and; in the second route, the remaining waste is conventionally collected and sent to landfill, which is operated by a private company, with that receives not only MSW Cidade Ocidental but also of Valparaíso de Goiás/GO - neighboring municipality to the city in study - thus forming a unique system in Goiás landfill shared. This system complies with the PNRS, which suggests the formation of consortia/sharing between cities, as well as the government will prioritize resources to municipalities that seek to unite to give a destination to their MSW. The objective of this study was to evaluate the technical, economic and environmental aspects existing of technological routes MSW municipality of Cidade Ocidental. For this, we carried out desk research by collecting secondary data and primary data collection also about technological routes of MSW city in study. The first route, the selective collecting-sorting central is not shared, because covers only the municipality of Cidade Ocidental, around 33.550 people attended. The current cost to maintain this system is R$ 375,58 per ton collected . The second route, the conventional collection-landfill is shared, also attending Valparaíso de Goiás, with about 190.000 people contemplated. To collect of form conventional and dispose at the landfill, the concessionaire, which forms with prefecture of Cidade Ocidental a public-private partnership of municipalities charge R$ 156,55 per tonne. The route of selective collecting-sorting central has some problems, which if corrected, can serve as a model for other municipalities in the state. And the second route, the conventional collection-landfill, has problems in public-private partnership, because the landfill is not the infrastructure and operation under ideal conditions, besides being with the license unsuccessful operation. However, if the mismatches are corrected, the landfill shared is a viable alternative to the municipalities of the state of Goiás.
Análise de blocos de concreto armado sobre estacas
(Universidade Federal de Goiás, 2010-12-16) SAKAI, Erika; SALES, Maurício Martines; http://lattes.cnpq.br/2033708685029423; PRADO, Ademir Aparecido do; http://lattes.cnpq.br/4118518363912053
Through studies on the choice of type of foundation to use a certain work, always when the foundation is to pile it is necessary to build another structural element, the block of crowing or also called pile caps. Several studies have been made taking into account the block on stilts without the influence of soil. So this work demonstrates the relationship of methods of calculation of reactions in piles and tensions in chunks of some authors that take into account the influence of soil or not, with the numerical analysis. To analyzethe fundations the program DIANA was used in conjunction with MIDAS / FX +. With these results, ground-structure in the study of these blocks can be concluded on the importance of the interaction, being distinguished that as example, that if the ground are taken in consideration in the analyses of rigid blocks, the biggest reactions if are concentrate near the corners of the block, independent of the type of load application studied and not in the props central offices as some simplified methods consider. This leads to a closer examination of reality and therefore more accurate.
Análise de confiabilidade em modelos de bielas e tirantes
(Universidade Federal de Goiás, 2013-08-27) Santos, Victor Mark Pontes dos; Pantoja, João da Costa; Almeida, Sylvia Regina Mesquita de; http://lattes.cnpq.br/1855764480221018; Almeida, Sylvia Regina Mesquita de; Araújo, Daniel de Lima; Vaz, Luiz Eloy
This work explores the use of reliability techniques for selecting strut and tie models and explores the use of topology optimization techniques to generate these models automatically. A literature review is presented exploring probability concepts useful in reliability analysis, concepts about classic approaches to generate strut and topology optimization. The formulation is based on concepts of the limit analysis thus they are the theoretical basis of the strut and tie model. Formulations used in reliability analysis are presented, such as the Monte Carlo simulation and the methods FOSM and FORM. These techniques are applied in nine numerical applications. The first two examples explore alternative techniques on the topology optimization field so as enable appropriate strut and tie results consistent with the project of concrete structures. The following examples are used to validate the tools used in the reliability analysis and in the limit analysis. Finally the four following examples apply reliability analysis with failure function based on limit analysis to compare classic models with those obtained by using topology optimization and analyze the security level of the models with respect to changes in concrete strength, reinforcement provided by the ties and thickness of the struts.
Análise de desempenho térmico e consumo de energia estudo de caso em hotelaria
(Universidade Federal de Goiás, 2008-10-03) PINTO, Maryana de Souza; GEYER, André Bortolacci; http://lattes.cnpq.br/0135796530510700
This study, concerns the area of Recursos Hídricos e Saneamento Ambiental, and investigates how internal and external temperature effects the comfort in a hotel building , which has multiple functions and different levels of users. It is aimed to check the thermal performances, considering the surrondings , the activities of the users, their preferences and possibilities of heat acclimatization, the final use and habits of consumption of electric energy. As a theoretical framework for this task, it uses by choice bioclimatic architecture , an area that concerns the construction focused on greater energy efficiency and comfort. The verification of environmental suitability offered in different environments evaluated, took advantage of the studies of Fanger (1970), suggested by ISO -7730 (1995), ISO-9920 (1995) and ASHRAE (1992), as well as questionnaires answered by users of the building. Thus proceeded to study the urban characterization of the city of Rio Quente; the survey and selection of the building for the Case Study; selection of sites for measurement, data collection, analysis and comparison of results with Thermal Comfort indexes suggested by Fanger (1970). The environments selected followed the criteria for critical positioning in line with the direction of longer periods of solar direct impact on the facades, the burden of occupation, the direct and ventilation equipment. This case study used five sets of comfort measuring devices, to obtain Dry Bulb Temperature (DBT) and Radiant Thermal Load (RTL) and Air Relative Humidity (ARH) . Data was collected internally and externally from the building in aim to verify the behaviour of this construction , and after the external data was compared to the data provided by the Plataforma de Coleta de Dados (PCD) of Serra de Caldas, for checking the quality of data available for designers. The analysis showed the best confort perfomance in the Accomodation Areas where, despite no possibility of acclimatization due to the short periods of stay , there was a significant response from the guests . The Common Area also showed satisfactory results in terms of this group of users, due to the characteristics of their clothing and metabolism which in itself merits this project. The worst performance took place in the Services Sector, which presented no conditions of comfort and stayed outside of Fanger´s scale during most of the day, subjecting users to discomfort, this shows that this group of users,workers, are not considered in the early stages of the project.
Análise de estimativas de precipitação por satélite e de diferentes métodos de preenchimento de falhas para a região do Sudeste Goiano
(Universidade Federal de Goiás, 2018-12-19) Duarte, Luíza Virgínia; Formiga, Klebber Teodomiro Martins; http://lattes.cnpq.br/0787413754235970; Formiga, Klebber Teodomiro Martins; Souza, Saulo Bruno Silveira e; Ferreira, Nilson Clementino
Precise estimation and monitoring of rainfall occurrence patterns are essential for the modeling of hydrological systems and the planning and management of water resources in various sectors of society. Failures in data series records may compromise studies in practical applications. Advances in precipitation physics are imperative to improve numerical models and rely heavily on testing new hypotheses for actual precipitation measurements, and improved predictions are deeply intertwined with the ability to measure precipitation. In this sense, the quality of satellite precipitation products has been significantly improved in the last decades, especially with the emergence of the missions: Tropical Rainfall Measuring Mission (TRMM) and the Global Precipitation Measurement (GPM) that comes as a successor to the TRMM mission in order to provide better global estimates of high quality and precipitation resolution. The objective of this study was to compare precipitation estimates generated by the GPM satellite with data observed on land in order to test the effectiveness of these rainfall estimates in relation to temporal and spatial patterns and to compare these data with traditional methods of filling data for the generation of complete series of data. The methods of comparison were applied for mean rainfall in the Meia Ponte and Rio dos Bois basins of the State of Goiás for daily, monthly and annual scales, and the failure completion methods were analyzed for the same region in daily and monthly data. The results were satisfactory for the monthly and annual analyzes in the region of the two basins and the daily precipitation data, due to their greater variability, they require more studies to refine the techniques in order to obtain better results.
Análise de estratégias para melhoria do conforto térmico em salas de aulas
(Universidade Federal de Goiás, 2016-08-31) Chaves, Victor Leandro Arantes; Brandstetter, Maria Carolina Gomes de Oliveira; http://lattes.cnpq.br/8038795637292636; Harbich, Loyde Vieira de Abreu; Silva Júnior, Leônidas Albano da; Labaki, Lucila Chebel
The unsatisfactory thermal performance of buildings belonging to higher education institutions in Brazil cause users discomfort in classrooms and affect student performance. To ensure the well- being to the user, the use of mechanical systems for cooling of environments such as the use of air conditioners is necessary to reduce air temperature indoor, by one hand, and increase the energy expenditure of the building by about 50%, by the other side. This study analyses thermal comfort and energy efficiency in the School of Civil Engineering and Environmental UFG through measurements "in loco" and the perception of the users as well as by computer simulation. The methodology consists of: a) analysis of architectural design; b) lifting climatic summer data on air temperature and humidity within the classroom, and the views of users in three different situations - with open windows and doors and on evaporative air conditioner, open windows and doors and natural ventilation, and windows and doors closed and air conditioning on -; c) treatment of climatic data; d) comparison of the collected results and the perception of the users; e) evaluation thermal energy by computer simulation and prescriptive method of RTQ-C. They interviewed 200 users. About 83.3% of respondents were dissatisfied in the situation with natural ventilation, 68.5% in the situation on evaporative air conditioner and 70.2% in the situation with air conditioning on. Although the results suggest that the situation using air conditioners is the most comfortable, the number of users who feel uncomfortable is very high in all situations, not meeting the levels recommended by the ISO 7730 (2005).
Análise de solicitações de assistência técnica em empreendimentos residenciais como ferramenta de gestão
(Universidade Federal de Goiás, 2013-04-30) Cruz, Daniel Cupertino da; Brandstetter, Maria Carolina Gomes de Oliveira; http://lattes.cnpq.br/8038795637292636; Brandstetter, Maria Carolina de Oliveira; Carasek, Helena; Granja, Ariovaldo Denis
Due to the emergence of several pathologies early detected in buildings, arises the need for increasingly detailed studies on the management of construction processes and failures that are being committed in several stages of an implementation project. Today the big difference for building companies is having the pursuit of customer satisfaction, the concepts of quality and performance often overlooked. Due to the competitive market, the improvement of services and production systems used, constitute the main challenge for companies, seeking for a balance regarding to the production cost, customer satisfaction and performance/ quality. Within this context, this article aims to analyze the databases of technical assistance to engineering firms within the city of Goiânia, as a way to get, through quantitative data, the main services that have higher incidences of requests and propose ways for data analysis. It was sought to conduct a conceptual study of important themes for after-work, being these ones the building maintenance, the structure and activities pertaining to the after-work and pathological manifestations. First it was conducted a survey of data on construction companies in Goiania, to obtain parameters on the form and level of development of the After-Work Department of the companies. Upon the completion of this survey, in a second step, two companies were chosen to carry out the case study, which consisted on data analyzis of the technical assistance performed, and the identification of services with higher incidences. These datas were treated in a quantitative manner and tabulated by Pareto Charts. In a third step, it was proposed a data analysis through FMEA tool, analyzing the severity, the possible costs and complexity of intervention of pathological manifestations detected, in order to obtain a better understanding over the priority risks in technical assistance. According to the results obtained in the case study, it was found that the main services that generates requests for technical assistance within the after-work services are hydro-sanitary facilities, with a percentage of 28% for Company A and 19% for Company D, followed by the services of wooden frames (doors) with a percentage of 14% for Company A and 27% for Company D. According to the origins of the occurrences of requests for technical assistance, it was observed that 44% of pathological manifestations can be detected under the implementation phase of the project. According to the FMEA analysis, it was found that 49% of the requests for technical assistance provided by the companies have low risk priority. As a tool for the After-Work Department, it was developed a dynamic management table to register the requests for technical assistance, in order to assist engineering firms in structuring such department. Through this research, it can be concluded that the increase of knowledge in relation to the data of technical assistance provided in the After-Work, is a great source of information and, such data when recorded correctly, provide benefits beyond the reduction in maintenance costs, like the benefits of customer satisfaction and improvements in future endeavors.

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