高墩多跨梁桥抗震性能设计研究

RESEARCH ON HIGH PIER MULTI-SPAN BEAM BRIDGE SEISMIC PERFORMANCE DESIGN

高墩梁桥在穿越深峡谷方面具有明显的优势,西南部山区水文地质情况较复杂,地震发生条件多变,必须对桥梁的抗震性能进行全方位的设计。在现行抗震设计规范的基础上,通过时程分析法,对地震区某高等级桥梁典型跨进行了抗震性能分析,得到了该桥的地震响应特征和发展规律,探讨了有效提高桥梁整体刚度和抗震性能的方法。研究结果可为西南部山区公路多跨桥梁的建设提供抗震性能参考设计。

High pier beam bridge has obvious advantage in passing through deep valley.The mountainous region in Southwest China has complex hydrogeological conditions and various earthquake conditions,so overall design of seismic performance of bridge must be carried out.Based on available code for seismic design,time-distance analysis method was adopted to analyze seismic performance of a high-grade bridge typical span in seismic area,and to obtain the earthquake response characteristics and development law of this bridge.It also discussed the method to effectively improve the overall rigidity and seismic performance of bridge.The research findings provided references for seismic performance design of multi-span bridge in Southwest China mountainous region.