大跨度连续刚构桥动力特性研究

摘要

The research object of this paper is prestressed concrete continuous rigid frame bridge, because of its high structural strength,strong seismic resistance,simple construction and other advantages,it has been rapidly developed and used at home and abroad in recent years.Taking Wangjiazhuang continuous rigid frame bridge with main span 100m as an example, the spatial finite element model was established by using MIDAS Civil 2015,through the analysis of the natural vibra-tion characteristics and the dynamic time history analysis under the earthquake,the main mode shapes and the internal force distribution law of the pier under the earthquake action were obtained,and some suggestions on the seismic design of the bridge pier structure were put forward.%文中所研究对象为预应力混凝土连续刚构桥,由于其具有结构强度高、抗震能力强、施工简便等优点,近年来在国内外得到快速发展和使用.以主跨100m的王家庄连续刚构桥为例,运用MIDAS Civil 2015建立空间有限元模型,通过对其进行自振特性及地震作用下的动力时程分析,得出主要振型形态及地震作用下桥墩的内力分布规律,对桥梁墩体结构抗震设计等方面提出建议.