地震作用下板式橡胶支座滑移对斜交桥受力特性的影响  

Influence of Slab Rubber Bearing Slip on Force Characteristics of Skew Bridge under Earthquake

作　　者：李伟斌 董晨 李楚涛 

机构地区：[1]江西理工大学,建筑与测绘工程学院,江西赣州341000

出　　处：《科学技术创新》2020年第10期109-111,共3页Scientific and Technological Innovation

摘　　要：为探究板式橡胶支座滑移对斜交桥在地震作用下的影响,本文通过Ansys进行建模及计算,对比分析斜交桥在考虑支座滑移和支座绑定这两种支座连接形式下的差异,结果表明,支座滑移和支座绑定在地震作用下,对地震波输入方向的影响不大,但对墩底内力和墩梁相对位移存在较大差异。考虑支座滑移时,斜交桥墩底弯矩及剪力要明显地小于支座绑定情况下的响应,梁端转角也明显的大于支座绑定,当相邻结构间距过小时,在考虑碰撞效应作用下,势必增大梁端的转角位移。这两种支座连接方式在地震作用下响应的差异将影响斜交桥的相关设计和研究工作。In order to investigate the influence of the plate rubber bearing slip on the skew bridge under earthquake,this paper uses Ansys to perform modeling and calculation,and compares and analyzes the connection of the skew bridge considering the bearing slip and bearing binding.The difference in the form shows that the bearing slip and bearing binding under the action of the earthquake have little effect on the input direction of the seismic wave,but there are large differences in the internal force at the bottom of the pier and the relative displacement of the pier beam.When considering bearing slip,the moment at the bottom of the skew bridge pier and the shear force are significantly smaller than the response in the case of bearing binding,and the beam end corner is also significantly larger than the bearing binding.When the distance between adjacent structures is too small,the Considering the collision effect,the angular displacement of the beam end will be increased.The difference in response between these two support connection methods under earthquakes will affect the related design and research work of skew bridges.

关 键 词：地震作用 板式橡胶支座 支座滑移 斜交桥 地震波输入方向 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U443.361[交通运输工程—道路与铁道工程]