可更换钢连梁的抗震性能研究  

A Study on the Seismic Behavior of Replaceable Steel Coupling Beams

作　　者：李斌 李园园 高春彦 LI Bin;LI Yuanyuan;GAO Chunyan(School of Civil Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学土木工程学院,内蒙古包头014010

出　　处：《建筑钢结构进展》2021年第11期9-15,共7页Progress in Steel Building Structures

基　　金：国家自然科学基金(51068021)。

摘　　要：以3个钢连梁试件为对象,采用2种不同的连接方式以及变换可更换段钢梁的截面高度,对可更换钢梁的抗震性能进行了试验研究。在抗震试验中,将钢梁分为3段,并削弱中间段,使破坏发生在中间段。考察试件的破坏形态、滞回曲线、骨架曲线、刚度退化、延性性能、耗能性能等指标。试验结果表明:试验中3个试件均发生了破坏,在连接方式相同的情况下,可更换段钢梁的截面高度对可更换钢梁的抗震性能有很大影响;在截面高度相同的情况下,焊接形式的钢梁的变形及耗能能力均小于栓接形式的钢梁的变形及耗能能力。In this paper,three specimens of steel coupling beams are taken as examples.In order to study the seismic performance of replaceable coupling steel beams,two different connection methods are applied and the section height of replaceable steel beams is varied.In the seismic test,the steel beam is divided into three sections to weaken the middle section and make the damage happen in the middle section.The failure modes,hysteretic curves,skeleton curves,stiffness degradation,ductility and energy dissipation of the specimens are investigated.The test results show that the three specimens failed in the same connection mode,the section height has a great influence on the seismic performance of replaceable coupling steel beams.In the same section height,the deformation and energy dissipation capacity of the welded beams are less than those of the bolted beams.

关 键 词：可更换钢连梁 可更换段与不可更换段连接 低周往复加载试验 抗震性能 试验研究 

分 类 号：TU973.31[建筑科学—结构工程]