配置CRB600H级箍筋混凝土柱抗震性能试验研究  

Experimental Study on Seismic Performance of Concrete Column with CRB600H Stirrups

作　　者：李国桢 朱爱萍 翟文 赵勇[1] LI Guozhen;ZHU Aiping;ZHAI Wen;ZHAO Yong(College of Civil Engineering,To ngji University,Shanghai 200092,China;China Academy of Building Research,Beijing 100013,China;Anyang Heli Techtronic Co.,Ltd.,Anyang 455000,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]中国建筑科学研究院有限公司,北京100013 [3]安阳合力创科冶金新技术股份有限公司,安阳455000

出　　处：《结构工程师》2022年第3期92-100,共9页Structural Engineers

基　　金：国家重点研发计划项目(2016YFC0701900);《冷轧带肋钢筋混凝土结构技术规程》修订研究项目。

摘　　要：对6个配置CRB600H级箍筋和HRB500E级纵筋的混凝土柱进行了拟静力试验,研究其破坏形态、滞回性能、骨架曲线、耗能、位移延性和极限承载力,分析配箍特征值对其抗震性能的影响。结果表明:各试件均呈现柱根部正截面受弯破坏;各试件的滞回曲线均较为饱满;各试件的位移延性系数为3.85~4.51,极限位移角为1/34~1/29,具有较好的延性性能;配置CRB600H级高强箍筋能提高混凝土柱的承载力和抗震性能。另外,结合收集到的19组配置550 MPa级冷轧带肋箍筋混凝土柱的抗震试验数据,经分析得到了配置高强冷轧带肋箍筋混凝土柱的位移延性系数、极限位移角与配箍特征值、轴压比的关系,并进一步提出了基于位移的柱端箍筋加密区最小配箍特征值的取值建议。Six concrete columns with CRB600H stirrups and HRB500E longitudinal reinforcement are subjected to a pseudo-static tests.The failure pattern,hysteretic performance,skeleton curve,energy consumption,displacement ductility and ultimate bearing capacity are studied,and the influence of characteristic value of stirrup on its seismic performance is analyzed.The results show that the specimens are damaged by bending in normal section;the hysteresis curve of each specimen is relatively full;the coefficient of displacement ductility is 3.85~4.51,and the ultimate displacement drift is 1/34~1/29,which implies good ductility;configuring CRB600H high-strength stirrups can improve the bearing capacity and seismic performance of concrete columns.In addition,combined the collected seismic test data of 19 groups of concrete column with 550 MPa cold-rolled ribbed stirrups,the relationship between displacement ductility coefficient,ultimate displacement angle,stirrup characteristic value and axial compression ratio of concrete columns with high-strength cold-rolled ribbed stirrups are obtained through analysis.Furthermore,based on the design theory of displacement performance,minimum characteristic value of stirrup in the densified zone of column end is proposed.

关 键 词：钢筋混凝土柱 冷轧带肋钢筋 高强箍筋 拟静力试验 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程] TU352.11