二重钢管防屈曲耗能支撑的有限元分析  

Finite element analysis of double-steel tube buckling-restrained braces

作　　者：邓雪松[1] 杨叶斌[1] 陈真[1] 周云[1] 邹征敏[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《地震工程与工程振动》2011年第6期96-101,共6页Earthquake Engineering and Engineering Dynamics

基　　金：广东省自然科学基金团队项目(8351009101000001);广东省自然科学基金项目(06021581);广东省科技计划项目(2007B030401010);减震控制与结构安全省部共建重点实验室开放基金项目;广州市教育系统创新学术团队项目(穗教科[2009]11号)

摘　　要：设计了12组41种二重钢管防屈曲耗能支撑试件,应用有限元软件ABAQUS对其进行了有限元分析,研究了径厚比、约束比、长细比和边界条件对支撑性能的影响。分析结果表明:二重钢管防屈曲耗能支撑的径厚比取值不大于24、约束比的取值不小于3时,支撑的滞回曲线饱满、稳定;当支撑的长细比增加时,可以通过提高约束比来避免支撑发生整体屈曲;支撑的边界条件宜设计成固接。Twelve groups and forty-one kinds of double-steel tube buckling-restrained braces were designed.Numerical analysis was carried out by using the finite element software ABAQUS to study the performance of the braces and the influences of radius-thickness ratio,restraint ratio,boundary condition and slenderness ratio.The results indicate that：the double-steel tube buckling-restrained braces have full and stable hysteretic curve when their radius-thickness ratios are not higher than twenty-four and their restraint ratios are not lower than three.When the slenderness ratios increase,the increase of restraint ratio may prevent the buckling of braces as a whole.The boundary condition of double-steel tube buckling-restrained brace is suggested to be clamped.

关 键 词：二重钢管防屈曲耗能支撑 滞回性能 有限元分析 

分 类 号：P315.92[天文地球—地震学] TU352.1[天文地球—固体地球物理学]