Comparison between the results of grillage analysis and 3D FEM for composite slab bridges with T-shapes

摘要

Although recent improvement of the performance of computers and software has made it possible to carry out very complicated structural analysis by 3D FEM, the grillage analysis is still generally used in the design practice of composite slab bridges from the view point of calculation cost and time. Therefore, the accuracy of the grillage analysis results should be evaluated by comparing with that of 3D FEM. In this study, these two analysis methods area applied for each model with various skew angles, widths and loading conditions and the difference of their results is examined.