新型外包钢筋混凝土钢管防屈曲耗能支撑性能  

Performance of New-type Steel Tube Buckling-Restrained Brace with Reinforced Concrete Outside

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

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《土木建筑与环境工程》2012年第1期21-28,共8页Journal of Civil,Architectural & Environment Engineering

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(06021581);广东省科技计划项目(2007B030401010)

摘　　要：研制了一种新型外包钢筋混凝土钢管防屈曲耗能支撑,设计6个新型外包钢筋混凝土钢管防屈曲耗能支撑试件,对其进行轴向循环荷载试验,并对其中的4组试件采用ABAQUS有限元数值模拟分析。研究结果表明:新型外包钢筋混凝土钢管防屈曲耗能支撑在受拉和受压时都能屈服而不屈曲,支撑的滞回曲线稳定、饱满,具有稳定的承载能力和良好的滞回耗能能力;新型外包钢筋混凝土钢管防屈曲耗能支撑的恢复力模型可采用双线性模型来描述;新型外包钢筋混凝土钢管防屈曲耗能支撑构造合理,耗能机理明确,采用钢筋混凝土约束核心钢管的设计思想是可行的。A New-type Steel Tube Buckling-Restrained Brace with Reinforced Concrete outside（ST-BRB-RC） was introduced in this paper.Six specimens of the ST-BRB-RC were designed and cyclic loading test were carried out to study the hysteretic energy dissipation performance of the six specimens.And then,ABAQUS finite element analysis was used to study the performance of four specimens.The results indicated that the ST-BRB-RC had stable and full hysteretic curve.The bearing capacity of the ST-BRB-RC was stable and the hysteretic behavior was excellent.And the analysis model of ST-BRB-RC could be described by a bilinear model.The construction of the ST-BRB-RC was reasonable,and the energy dissipation mechanism of the ST-BRB-RC was clear.It is proved that the design philosophy of using reinforced concrete for exterior restrained element was available.

关 键 词：外包钢筋混凝土 防屈曲耗能支撑 循环荷载试验 滞回曲线 骨架曲线 

分 类 号：TU352.1[建筑科学—结构工程]