往复荷载作用下加芯混凝土框架柱刚度与耗能试验分析  

Experimental analysis for stiffness and energy-dissipation of concrete frame columns with central reinforcement under cyclic lateral loading

作　　者：郭军庆[1] 雷自学[1] 周天华[1] 

机构地区：[1]长安大学建筑工程学院,西安710061

出　　处：《建筑结构》2008年第5期45-48,共4页Building Structure

基　　金：教育部科学技术研究重点项目(03162);陕西省自然科学研究项目(2003E201)

摘　　要：通过加芯混凝土框架柱和普通混凝土框架柱在高轴压比下的低周往复加载试验,对试件的P-Δ滞回曲线、刚度退化和等效粘滞阻尼系数等进行了研究,分析了加芯混凝土框架柱刚度和耗能的影响因素。分析结果表明,在高轴压比下,合理设置芯柱可使加芯混凝土框架柱的刚度和耗能性能明显改善;芯柱的纵筋配筋率、截面面积和体积配箍率对加芯混凝土框架柱的刚度和耗能能力具有不同程度的影响。Through the test of concrete frame columns with central reinforcement and general concrete frame column under high axial compression ratio and cyclic lateral loading, the p-△ hysteresis curve, stiffness degradation, viscous damping coifficients etc. for each specimen are studied. The factors affecting the stiffness and energy-dissipation of concrete frame columns with central reinforcement are investigated. The analytical results show that the stiffness and energy-dissipation cehavior of concrete frame columns under high axial compression ratio and with central reinforcement may be improved remarkably by reasonable arrangement of the core column. The area of cross section, longitudinal reinforcement ratio and volumetric tie ratio of the core column have different influences on the stiffness and energy-dissipation capacity of concrete frame columns with central reinforcement.

关 键 词：加芯混凝土框架柱 高轴压比 刚度 耗能 芯柱 

分 类 号：TU375.301[建筑科学—结构工程] TU435