加宽桥梁不同拼接模式下的抗震性能比较分析

Comparative analysis of different stitching mode widened bridge seismic performance

介绍了目前高速公路桥梁加宽常用的几种拼接模式及其优缺点,结合工程实例,借助MIDAS有限元分析软件建立空间有限元模型,分析采用不同拼接模式加宽后成桥状态的抗震性能.从抗震分析的角度,对几种拼接模式进行比较分析.结果表明,采用双柱加宽的桥梁,"上下部均连接"与"上连下不连"两种拼接模式下的成桥状态抗震性能差别不大;采用独柱加宽的桥梁,从成桥抗震性能分析,"上下部均连接"的拼接模式要优于采用"上连下不连"拼接模式.

This paper introduced the highway the bridge widening used several splicing mode and its advantages and disadvantages. With an example, by means of the MIDAS finite ele- ment analysis software to establish the spatial finite element model analysis of the seismic performance of the state using different stitching mode widened bridge. From the point of view of the seismic analysis, comparative analysis of several splicing mode. The results showed that the double column widening of the bridge, ＂the upper and lower parts are con- nected＂ and ＂the upper structure connected to the lower part of the structure is not connect- ed＂ into bridge seismic performance was not very different in the two splicing mode; to one pillar widened bridge into seismic performance of the bridge, ＂the upper and lower parts are connected＂ stitching mode is superior to ＂The upper structure connected to the lower part of the structure is not connected＂ stitching mode.