http://repositorio.ufc.br/handle/riufc/24016 2026-06-11T16:51:48Z 2026-06-11T16:51:48Z Santos Junior, Francisco Marques dos http://repositorio.ufc.br/handle/riufc/86713 2026-06-11T12:56:37Z 2026-01-01T00:00:00Z

Título: Estudo comparativo de deslocamentos em lajes de concreto armado: Teoria de Kirchhoff e Método dos Elementos Finitos Autor(es): Santos Junior, Francisco Marques dos Abstract: This study aims to compare the maximum displacements of reinforced concrete slabs using two distinct approaches: the classical Kirchhoff-Love plate theory and numerical modeling based on the Finite Element Method (FEM). Rectangular slabs subjected to uniformly distributed loads were analyzed under different boundary conditions, geometric aspect ratios, and varying thicknesses, in order to assess the validity of the plate assumption. Analytical solutions derived from Kirchhoff-Love theory were obtained through classical series formulations, while numerical analyses were carried out using the COMSOL Multiphysics software under a linear elastic framework. The results demonstrated excellent agreement between analytical and numerical solutions for slabs with high span-to-thickness ratios, confirming the applicability of plate theory within this regime. As slab thickness increases, progressive discrepancies between the analytical results and FEM predictions were observed, mainly due to the influence of transverse shear effects and the formulation of the finite element employed. It is concluded that Kirchhoff Love theory is suitable for displacement estimation in slabs, whereas the Finite Element Method provides greater flexibility and accuracy when classical assumptions are no longer valid. Tipo: TCC

2026-01-01T00:00:00Z Bezerra, Marcus Vinícius Pereira http://repositorio.ufc.br/handle/riufc/84862 2026-02-23T13:05:53Z 2026-01-01T00:00:00Z

Título: Aplicação da metodologia BIM para projeto e orçamentação de obra de reforma em escola pública de ensino Autor(es): Bezerra, Marcus Vinícius Pereira Abstract: In the Brazilian context, the inefficient management of public renovation works compromises educational infrastructure. These projects, marked by successive change orders and work stoppages, hinder the provision of adequate school facilities. Building Information Modeling (BIM) represents an innovative approach in the construction sector. This methodology provides greater project accuracy and reduces the occurrence of contractual amendments and budget overruns. In this context, this study aims to develop BIM modeling and cost estimation for the renovation projects of a public school within the public education system. Based on the existing architectural CAD drawings and an on-site survey, BIM models were developed for the architectural, electrical, hydraulic, sanitary, and structural disciplines. From the BIM models, quantity takeoffs were extracted and used for cost estimation using the Seobra® software. The results reaffirm the potential of the BIM methodology for quantity extraction and cost estimation, supporting the delivery of efficient and functional projects. This application highlights the effectiveness of BIM tools, resulting in coordinated and efficient project delivery, as well as accuracy in generating the total construction cost estimate. Tipo: TCC

2026-01-01T00:00:00Z Oliveira, Rodolfo Moredisson Silva de http://repositorio.ufc.br/handle/riufc/84730 2026-02-11T16:56:05Z 2026-01-01T00:00:00Z

Título: Desempenho mecânico de uma mistura composta por solo e cinza têxtil para fins de uso na pavimentação Autor(es): Oliveira, Rodolfo Moredisson Silva de Abstract: Industrial solid waste, especially that generated by the textile industry, represents a serious environmental problem due to its high volume and inadequate final disposal, which often occurs through landfilling. This accumulation negatively impacts the environment and wastes a material that could be reused in engineering applications. In this context, it becomes necessary to seek alternatives for the reuse of such waste, combining sustainability with technical efficiency. At the same time, the increasing demand for materials used in pavement construction, together with the scarcity of high-quality natural resources near construction sites, has encouraged the search for technical and environmentally sustainable solutions. Within this framework, this research aimed to analyze the technical feasibility of using a soil–textile ash mixture as an alternative material for pavement layers by evaluating its physical, chemical, and mechanical properties when incorporated into sandy soil. The ash used originated from combustion in ceramic kilns at Cerâmica do Liro in Russas, Ceará, Brazil, while the soil was collected from a rural road in the same municipality. The methodology included the application of the Modified Andreasen particle packing model in order to optimize the granulometric curve of the mixture, in addition to laboratory tests for characterization and performance evaluation. Different waste incorporation contents were also tested, and the method was used to determine the optimum content. Hygroscopic moisture, Atterberg limits, particle size distribution by sieving and sedimentation, specific gravity of grains, compaction, and California Bearing Ratio (CBR) tests were performed. The proposed optimized mixture consisted of 70% sandy soil and 30% textile ash, a proportion defined based on the theoretical particle packing curve. The results indicated that both the soil and the ash exhibited non-plastic behavior, low hygroscopic moisture content, and were classified as silty sand (SM) according to the Unified Soil Classification System (USCS). The specific gravity of the grains of the mixture was 2,720 kg/m3, a value considered satisfactory for geotechnical applications. In the compaction tests, the soil–ash mixture presented a maximum dry unit weight of 19.14 kN/m3 and an optimum moisture content of 8.60%, demonstrating good compactability with low moisture content. The CBR values of the samples ranged from 46% to 83%, all exceeding the minimum requirement established by DNIT standards (≥ 20%) for subbase layers. The expansion by immersion ranged from 0.0% to 0.2%, indicating volumetric stability. Therefore, it is concluded that the soil–ash mixture, particularly at the proportion of 30% ash, represents a technically and environmentally suitable alternative, promoting the reuse of industrial waste, contributing to the circular economy, and reducing environmental impacts associated with the improper disposal of textile ash. Tipo: TCC

2026-01-01T00:00:00Z Lima, Jocássia Maria de Oliveira de http://repositorio.ufc.br/handle/riufc/84694 2026-02-11T11:53:29Z 2026-01-01T00:00:00Z

Título: Análise do comportamento mêcanico de um solo estabilizado com cimento e reforçado com fibra de coco para fins de pavimentação Autor(es): Lima, Jocássia Maria de Oliveira de Abstract: Soils available in local borrow pits do not always present geotechnical characteristics compatible with the structural requirements of pavement layers, making it necessary to adopt stabilization and reinforcement techniques. Cement stabilization is widely used in this context; however, it may result in materials with brittle behavior and high susceptibility to cracking. As an alternative, the incorporation of natural fibers plays the role of structural reinforcement in these mixtures, while also promoting the reuse of residues. In this context, this study evaluated the mechanical behavior of soil mixtures stabilized with cement contents of 5%, 7%, and 9%, combined with the incorporation of coconut fiber at contents of 0.25%, 0.75%, and 1%, with a fixed length of 25 mm. For comparative purposes, natural soil, soil–cement, and soil–fiber mixtures were also analyzed. The experimental program comprised geotechnical characterization of the soil, compaction tests, and mechanical evaluation through Unconfined Compressive Strength (UCS), Indirect Tensile Strength (ITS), California Bearing Ratio (CBR), and Resilient Modulus (RM) tests. Based on the experimental data, mechanistic–empirical pavement design was performed using the MeDiNa software. The results showed that soil– cement mixtures without reinforcement did not reach the minimum UCS value of 2.1 MPa required by standards for application as base layers, whereas the incorporation of coconut fiber promoted strength gains sufficient to meet this requirement, in addition to modifying the failure mode, resulting in a more ductile structural behavior. Among the compositions evaluated, the mixture containing 5% cement and 1% fiber presented the best balance between mechanical performance and material consumption. The mechanistic–empirical design results indicated that soil–cement–fiber mixtures meet the performance criteria for different traffic levels, including higher traffic scenarios, provided that structural layer thicknesses compatible with design requirements are adopted. The potential of this composite material for application in pavement base layers was evidenced, while soil–fiber mixtures proved suitable for subbase layers, highlighting the technical feasibility of the solutions, reduced binder consumption, and environmentally appropriate destination of the residue Tipo: TCC

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