Transverse load distribution behavior amongst bridge girders is influenced by many parameters including girder material properties, spacing, skew, deck design, and stiffening element interactions. In order to simply and conservatively approximate the bridge superstructure load distribution between girders, the American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications contain load distribution factor (LDF) equations for many common bridge types. The Texas Department of Transportation (TxDOT) had recently developed a new design for bridge superstructures that utilizes a spread configuration of prestressed concrete slab beams. AASHTO does not contain LDFs for this type of bridge so the load sharing behavior of this superstructure must be investigated further. TxDOT has funded the Texas A&M University Transportation Institute (TTI) to design, model, construct, test, and analyze a full scale spread slab beam bridge. In addition to this testing, an existing slab beam bridge in Denison, Texas will be instrumented and observed for supplementary slab beam behavior data. To predict bridge behavior, computer models of the Riverside experimental bridge and of the Denison field bridge were developed using both the grillage and finite element methods of analysis. The experimental results from the Riverside and Denison bridges will not be collected by the conclusion of this thesis so a third bridge with existing experimental data, the Drehersville, Pennsylvania bridge, was also modeled for calibration purposes. The work presented by this thesis focuses on how to accurately model transverse load distribution relationships and LDFs for use in bridge design. The analysis covered is concentrated primarily on the grillage method, with the finite element analysis as part of the larger project scope. From this analysis it was determined that the grillage method was able to accurately model bridge LDFs as compared to FEM modeling and experimental results, for spread slab beam and spread box beam bridges. The critical loading configurations for all bridges placed two trucks side by side and as far to one edge of the bridge as possible. It was also determined that at an ultimate loading case, the load is distributed much more evenly across the deck than at service loading.

Este trabalho apresenta o estudo de uma formulação do método dos elementos de contorno para a análise da interação placa-viga de pavimentos de edifícios. Para compatibilizar adequadamente as vigas e a placa, é utilizada uma formulação alternativa do método dos elementos de contorno para placas delgadas em que, a viga é modelada por equações diferenciais ordinárias e, a compatibilidade entre a placa e a viga é feita por meio dos deslocamentos e forças de ligação nos nós dos elementos. Após a imposição das condições de contorno e resolução final do sistema de equações, são obtidos os esforços nas vigas e deslocamentos na placa, que por fim são confrontados com outras formulações. Exemplos foram analisados demonstrando uma ótima concordância com os exemplos obtidos por outras formulações. / This work presents a formulation of the boundary element method for the analysis of plate-beam interaction in buildings floors. In order to properly match the beams and plate is used an alternative formulation of the boundary element method for thin plates, in which the beam is modeled by ordinary differential equations and the compatibility between plate and beam is done by the displacements and forces of connection in the nodes of the elements. After applying boundary conditions and final resolution of the system of equations, efforts are obtained in beams and plate displacements, that are confronted with other formulations. Samples were analyzed showing excellent results compared with those obtained by other formulations.

Este trabalho apresenta o estudo de uma formulação do método dos elementos de contorno para a análise da interação placa-viga de pavimentos de edifícios. Para compatibilizar adequadamente as vigas e a placa, é utilizada uma formulação alternativa do método dos elementos de contorno para placas delgadas em que, a viga é modelada por equações diferenciais ordinárias e, a compatibilidade entre a placa e a viga é feita por meio dos deslocamentos e forças de ligação nos nós dos elementos. Após a imposição das condições de contorno e resolução final do sistema de equações, são obtidos os esforços nas vigas e deslocamentos na placa, que por fim são confrontados com outras formulações. Exemplos foram analisados demonstrando uma ótima concordância com os exemplos obtidos por outras formulações. / This work presents a formulation of the boundary element method for the analysis of plate-beam interaction in buildings floors. In order to properly match the beams and plate is used an alternative formulation of the boundary element method for thin plates, in which the beam is modeled by ordinary differential equations and the compatibility between plate and beam is done by the displacements and forces of connection in the nodes of the elements. After applying boundary conditions and final resolution of the system of equations, efforts are obtained in beams and plate displacements, that are confronted with other formulations. Samples were analyzed showing excellent results compared with those obtained by other formulations.

The master´s thesis deals with a new road bridge on the road II/379. There are three possible variants in preliminary design but only the option of connected girder slab beam of four fields was selected. This variant was assessed by static calculation in accordance with European standards. Other important parts of this thesis are also drawings, construction progress, visualisation and technical report.

The content of the thesis is a static design of the supporting parts of the extension of the textbook pavilion of the elementary school in Mirošov. The proposed building is a four-storey reinforced concrete monolithic column construction. The ceilings above the first three floors are designed as cross-reinforced slabs with internal girders. The roof slab consists of a monolithic slab with additionally prestressed beams. The internal forces were calculated using SCIA Engeneer 19.0 and these values were subsequently verified by manual calculation. The design followed the applicable European standards. The result of the work is a static assessment of the object and corresponding drawing documentation.

The proposal is for new construction of a road bridge over the highway.Three options of solutions were proposed but only the option of connected girder slab beam of six fields was selected. This variant was assessed by static calculation. Static calculation is processed in accordance with European standards. Another important part of this thesis is also drawings, visualization, technical report and construction procedure.