城市高架桥梁延性抗震设计方法研究

Study on Ductility Aseismic Design Method of Urban Viaduct

摘要:

桥梁抗震设计是高架桥梁设计的关键之一，在整个桥梁的下部结构设计工作中占据了很大的比重。延性抗震设计方法由于具有经济、耐久、可靠和施工方便等优势，在高架桥梁抗震设计中占据主要地位，故对延性抗震的设计方法及思路进行总结和进一步研究十分必要。以工程实例为背景，给出城市高架桥梁延性抗震的概念设计思路，采用有限元方法建立空间梁单元抗震分析模型，总结了地震作用下各构件的验算方法，并对延性抗震的适用条件进行研究，为相关工程的抗震设计提供参考。

Abstract:

Aseismic design of bridge is one of the key points in the viaduct design, which plays an important role in the design of bridge substructure. Due to its advantages of economy, durability, reliability and convenient construction, the ductility aseismic design method plays an important role in the aseismic design of viaduct. Therefore, it is necessary to summarize and further study the ductility aseismic design method and ideas. Based on an engineering example, a conceptual design idea of ductility aseismic design for urban viaduct is given. An aseismic analysis model is spatial beam element is established by the finite element method to summarize the checking calculation method of each component under earthquake action, and study the applicable conditions of seismic ductility, which provide reference for the aseismic design of similar projects.