HSRC框架柱抗震性能试验研究  

Experimental Research on Aseismic Behaviors of High-Strength Reinforced Concrete Frame Columns

作　　者：冯宏[1] 李立仁[1] 陈永庆[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《西南交通大学学报》2010年第5期705-712,共8页Journal of Southwest Jiaotong University

基　　金：重庆市建设委员会基金资助项目(重庆市建设委员会城科字2004第25号)

摘　　要：为了研究HSRC（high-strength reinforced concrete）框架柱的抗震性能,对19根HSRC框架柱采用低周反复加载方法进行拟静力试验.研究了HSRC框架柱在压弯剪共同作用下的破坏特征和抗震性能;分析了含钢量、轴压比、配箍率、剪跨比以及混凝土强度对HSRC框架柱抗震性能的影响.结果表明：与普通RC框架柱相比,HSRC框架柱极限承载力与延性显著提高,抗震性能明显改善;在压弯剪共同作用下,含钢量、剪跨比、混凝土强度对HSRC框架柱的抗震性能影响较大,轴压比、体积配箍率对HSRC框架柱的抗震性能影响较小;剪跨比大于等于3的HSRC框架柱的经济合理参数为：含钢量3.5%-4.5%;设计轴压比0.45-0.60;体积配箍率0.8%-1.0%.In order to investigate the failure mode and seismic behaviors of high-strength reinforced concrete（HSRC） frame columns under the combined action of compression,bending and shear,quasi-static experiments on 19 such frame columns under low cyclic reversed loading were conducted.The influences of parameters such as steel content,axial compression ratios,stirrup ratio,shear-span ratio and concrete strength on the seismic behaviors of the HSRC frame columns were analyzed.The results show that the ultimate bearing capacity and ductility of HSRC columns improves considerably,compared with reinforced concrete（RC） columns;and hence the seismic performance of the HSRC columns is remarkably better.Under the combined action of compression,bending and shear,steel content,shear-span ratio and concrete strength play more dominant roles than other parameters in enhancing the seismic performance of HSRC columns.The rational parameters for HSRC columns whose λ is not less than 3 are 3.5%-4.5% steel content,0.45-0.60 axial compression ratios,and 0.8%-1.0% transverse reinforcement ratio.

关 键 词：HSRC框架柱 低周反复加载 滞回曲线 骨架曲线 延性比 抗震性能 

分 类 号：TU398[建筑科学—结构工程]