波形钢腹板PC连续梁桥抗震性能研究及减隔震设计

Analysis on Seismic Performance and Design on Seismic Mitigation and Absorption of Corrugated Steel Web PC Continuous Beam Bridge

摘要:

依托南昌市某大跨波形钢腹板PC连续梁桥，通过建立有限元模型对其抗震性能分析了其在不同方向地震波作用下的内力和位移分布规律。结果表明，纵向和横向地震波对内力的影响方向不同，设计配筋可根据主要受力方向对应加强。同时对主桥进行了减隔震支座设计，计算结果表明减隔震支座可以有效降低地震响应，降低幅度可达34%～56%，建议在抗震标准高的桥梁中使用减隔震支座。

Abstract:

Relying on a long-span corrugated steel web PC continuous beam bridge in Nanchang, a finite element model is established to analyze its seismic performance, and analyzed its distribution laws of internal force and displacement under the action of seismic waves in different directions. The result shows that the influence directions of longitudinal and transverse seismic waves on the internal force are different. The design reinforcement can be strengthened according to the main stress direction. At the same time, the seismic mitigation and absorption bearings of the main bridge are designed. The calculation results show that the seismic mitigation and absorption bearings can effectively reduce the seismic response. The reduction range can reach 34%~56%. It is suggested to use the seismic mitigation and absorption bearings in bridges with the high seismic standards.