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(長安大學建筑工程學院，西安 710061)

［摘要］通過加芯混凝土框架柱和普通混凝土框架柱在高軸壓比下的低周往復加載試驗，對試件的P-Δ滯回曲線、剛度退化和等效粘滯阻尼系數(shù)等進行了研究，分析了加芯混凝土框架柱剛度和耗能的影響因素。分析結果表明，在高軸壓比下，合理設置芯柱可使加芯混凝土框架柱的剛度和耗能性能明顯改善；芯柱的縱筋配筋率、截面面積和體積配箍率對加芯混凝土框架柱的剛度和耗能能力具有不同程度的影響。

［關鍵詞］加芯混凝土框架柱；高軸壓比；剛度；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