Analysis of Rational Finite Element Model of Two-Span Skew Girder Bridge Based on Shaking Table Test

Abstract

Based on the shaking table test, the seismic responses of the main parameters of the two-span skew bridge were gutted. The finite element model of the test model was established by the finite element analysis software OpenSEES. An improved model of single beam quality distribution was proposed. The stiffness of the end beam of the improved single beam model was twice that of the actual end beam, rather than the rigid arm. At the same time, the main beam mass was distributed in the way that the single beam shares half and the beams at both ends share half, taking into account the torsion of the beam body. Three-direction ground motion input analysis was carried out to improve the quality distribution model of the single beam, and the seismic response of the structure under the three-direction ground motion input was obtained, and the comparison was made between the analytical results and experimental results. The results show that the improved single beam quality distribution model can consider the torsion effect of the beam, while the result of the analysis was greatly improved, which was more close to the experimental value, and could greatly improve the efficiency of the calculation.