薄柔H形钢部分包裹混凝土梁柱组合体抗震性能研究  

Research on seismic behavior of connections between slender partially concrete encased H steel column and steel beam

作　　者：赵根田[1] 王聊杨 冯超[1] 

机构地区：[1]内蒙古科技大学建筑与土木工程学院,内蒙古包头014010

出　　处：《建筑结构学报》2013年第S1期96-101,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(51268042);内蒙古自然科学基金项目(2011MS0704)

摘　　要：梁柱节点是框架结构的关键连接部位,其连接性能决定着整体框架的抗震性能。为了研究薄柔H形钢部分包裹混凝土梁柱节点的应力分布、位移反应及承载力,分析节点各部件塑性渐变的全过程以及破坏模式,针对端板半刚性连接的梁柱节点形式,对部分包裹混凝土柱与型钢梁连接组合体在低周反复水平荷载作用下的受力性能进行了试验研究。试验共设计了4个构造不同的梁柱组合体,研究各连接组件板域的应变分布,试件各控制点的屈服次序为:梁翼缘处的横向系杆,梁端部受拉翼缘,柱翼缘,与梁受拉翼缘焊接的端板。分析了端板厚度、加劲板、背垫板对梁柱组合体承载力、刚度及延性性能的影响,结果表明,随端板厚度的增加及设置背垫板,组合体的承载力提高,端板厚度及设置背垫板对组合体的刚度影响很大,部分包裹混凝土柱与型钢梁外伸端板连接组合体的延性满足规范要求。The behavior of beam-column connections is key to the whole seismic performance of frame structure.In order to investigate the stress distribution,deformation and the bearing capacity of slender partially concrete encased H steel composite columns and steel beam connection,and analyze failure modes and plastic development of whole component,four different semi-rigid beam-column end plate connections were designed.The strain distributions of each connection region were researched by applying low cycle reversed loading.The link at beam flange,tension flange of beam bottom,columns flange and end plate yielded in sequence.The influences of the thickness of end plate,stiffener plate and backing plate on the bearing capacity,stiffness and ductility performance of the connection were analyzed.The bearing capacity of the beam-column connection can be improved by increasing end plate thickness and using back plate.The effects of the end plate thickness as well as setting the back plate on the connection stiffness are significant.The ductility of partially concrete encased composite columns and steel beam outer end plate connection can meet the current specifications.

关 键 词：部分包裹混凝土组合柱 外伸端板梁柱节点 拟静力试验 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程]