某桥梁两种加固方案的地震响应对比研究

Comparative study on the seismic response of two strengthening schemes for a bridge

某跨江公路桥梁因洪水冲刷导致桩基外露,需进行基础加固,采用时程分析法分别对增设“承台+桩基”的两种加固方案的地震响应情况进行了计算。结果表明:三根桩方案位移响应略大,但轴力、弯矩及剪力均比两根桩方案小,受力情况优于两根桩方案。

The foundation of a cross-river highway bridge exposed to flooding caused pile foundation to be reinforced.The time history analysis method was used to calculate the seismic response of two additional reinforcement schemes of"cap+pile foundation".The results show that the displacement response of the three-pile scheme is slightly larger,but the axial force,bending moment and shear force are smaller than the two-pile scheme,and the stress is better than the two-pile scheme.