减震榫设计及试验研究  

Design and experimental study of shock absorber

作　　者：孟兮[1] 倪燕平[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《北京交通大学学报》2013年第3期103-106,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家"863"重点计划项目资助(2008AA030707)

摘　　要：结合高速铁路桥梁抗震设计的需要,基于支座功能分离的设计理念,对现有防落梁装置的结构进行了改进,设计出上端线性,下端等强度的减震榫结构.通过对3种常用截面减震榫的延性分析,确定了圆形截面作为减震榫的合理截面形式,对两根等尺寸减震榫进行了拟静力试验,结果表明:减震榫具有稳定的滞回性能和良好的塑性变形能力,是一种理想的耗能元件.According to the demand of the seismic design of high speed railway bridge, based on the idea of bearing function separation, a new type of shock absorber that can be used to railway bridges is presented. The absorbers with three types of common cross-sections are selected and their ductile properties are analyzed. It is concluded that the shock absorber with circular cross-section is more reasonable, and the structure of the absorber is designed in detail. Furthermore, quasi-static tests for two absorbers are conducted. The results show that the shock absorber possesses the stable hysteretic capacity and sufficient plastic deformation capacity. The shock absorber is a kind of ideal energy dissipation component.

关 键 词：高速铁路桥梁 减震榫 延性 拟静力试验 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]