Dynamic analysis and modal test of bent steel box girder bridge

bridge engineering;  continuous bending box girder;  Liang Gefa;  Modal testing

According to the dynamic characteristics of the large curvature bending steel box girder bridge, the single girder model, the beam lattice model and the plate element model were established through the large finite element program, and the numerical simulation analysis was carried out, and the modal test of the indoor model was carried out by the force hammer impact method, and the test results were compared with the numerical analysis results. The results show that the single girder method is not suitable for calculating the transverse mode, and the ordinary beam lattice method can better simulate the dynamic performance of the vertical and torsional bent box bridge, but the conversion relationship of the transverse stiffness in the static calculation of the main beam should not be considered.