减震榫滞回性能理论及试验研究  

Theoretical and Experimental Study of Hysteretic Behavior of Shock Absorber

作　　者：孟兮[1] 高日[1] 李承根[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：《桥梁建设》2015年第3期20-25,共6页Bridge Construction

基　　金：国家"863"计划项目(2008AA030707)~~

摘　　要：为明确减震榫的受力特点、变形形态及耗能效果,以高铁兰新线32m简支梁桥的减隔震设计为背景进行研究。推导减震榫核心性能参数的理论估算公式;对全尺寸减震榫试件进行拟静力循环加载试验,验证其滞回耗能性能;采用ABAQUS有限元软件对减震榫进行有限元模拟分析,并与理论计算值和试验结果进行对比。研究结果表明:减震榫滞回曲线饱满,具有稳定的滞回性能和良好的塑性变形能力,等效粘滞阻尼系数可达到40%,是一种理想的耗能元件;推导出的核心性能参数理论公式与有限元计算值和试验测定值非常接近,能够较为准确地反应减震榫的工作性能。To make clear the mechanical characteristics ,deformation patterns and energy dissi‐pation effect of shock absorber ,the seismic mitigation and isolation design of a 32‐m span simply‐supported girder bridge on Lanzhou‐Xinjiang High‐Speed Railway was cited as an example and the relevant performance of the shock absorber specimens was studied .The theoretical estimation for‐mula for the core performance parameters of the shock absorber was derived and the pseudo‐static cycling loading tests for the full‐scale shock absorber were made to verify the hysteretic behavior of the shock absorber .The software ABAQUS was used to implement the finite element simulation analysis of the shock absorber and the calculation values and test results of the shock absorber were compared .The results of the study indicate that the hysteretic curves of the shock absorber are full ,the shock absorber has stable hysteretic behavior and good plastic deformation capacity , the equivalent viscous damping factor can reach 40% and the shock absorber is a kind of ideal ener‐gy dissipation component .The calculation values obtained according to the derived formula are ver‐y close to the values of the finite element calculation and tests and can correctly represent the working performance of the shock absorber .

关 键 词：减震榫 滞回性能 核心性能参数 模型试验 循环加载 有限元法 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]