既有桥梁抗震性能提升关键技术研究

Overview of Seismic Performance Improvement Technology for Existing Bridges

随着抗震规范的更新迭代及地震区划图的修编,既有桥梁的抗震性能无法满足当前的需求,面对众多既有桥梁,逐步提升其抗震性能是必要和迫切的。本文通过从结构加固、减隔震化、防落梁措施等方面,给出既有桥梁抗震性能提升的具体途径,同时论证了以上方法的具体适用条件。桥梁管理者可综合各方面因素,对众多的既有桥梁做好抗震性能提升规划,结合本文给出的方法,分门别类地提升既有桥梁的抗震性能,满足新时期老旧桥梁的抗震需求。

With the updating and iteration of seismic codes and the revision of seismic zoning maps,the seismic performance of existing bridges cannot meet the current needs.In the face of numerous existing bridges,it is necessary and urgent to gradually improve their seismic performance.This paper provides specific ways to improve the seismic performance of existing bridges through structural reinforcement,seismic reduction and isolation,and anti falling beam measures,and demonstrates the specific applicable conditions of the above methods.Bridge managers can take into account various factors and plan for improving the seismic performance of numerous existing bridges.By combining the methods presented in this article,they can improve the seismic performance of existing bridges in different categories to meet the seismic needs of old and new bridges in the new era.