(长安大学建筑工程学院，西安 710061)

［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。

［关键词］加芯混凝土框架柱；高轴压比；刚度；耗能；芯柱

Experimental analysis for stiffness and energy-dissipation of concrete frame columns

 with central reinforcement under cyclic lateral loading Guo Junqing, Lei Zixue, Zhou Tianhua(School of Architectural Engineering, Chang´an University, Xi´an 710061,China)

Abstract: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-Δhysteresis 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.

Keywords:columns with central reinforcement; high axial compression ratio; stiffness; energydissipation; core column