细晶粒钢筋增强混凝土柱抗震性能试验研究  

Experimental study on the seismic behavior of RC columns reinforced with fine grain steel bars

作　　者：葛文杰[1] 张继文[2] 曹大富[1] 戴航[2] 李琮琦[1] 

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]东南大学混凝土及预应力混凝土教育部重点实验室,江苏南京210096

出　　处：《地震工程与工程振动》2013年第5期162-166,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51308490);江苏省自然科学基金项目(BK20130450);江苏省高校自然科学基金项目(13KJB560015);住房和城乡建设部科学技术计划项目(2013-K4-17);扬州市科技计划项目(2012149);东南大学混凝土及预应力混凝土教育部重点实验室开放基金项目

摘　　要：为研究细晶粒钢筋增强混凝土柱的抗震性能,进行了4根400MPa级细晶粒钢筋增强矩形截面混凝土柱的低周反复荷载试验,研究配筋率、轴压比、配箍率对混凝土柱抗震性能的影响。分析了试件的滞回曲线和骨架曲线,求出了各试件的特征参数和延性系数。结果表明,400MPa级细晶粒钢筋混凝土柱具有良好的抗震性能。随着配筋率的增加,屈服荷载和峰值荷载均相应提高,延性也相应提高;轴压比大的柱其水平峰值荷载相对较大,但骨架曲线超过荷载峰值点后的下降段部分较陡,延性较差;轴压比小的柱其水平峰值荷载相对较小,其骨架曲线超过荷载峰值点后的下降段部分较平缓,延性较好;随着体积配箍率的增加,试件抗震性能和延性均相应提高。In order to investigate the seismic behavior of RC columns reinforced with fine grain steel bars, four rec- tangle cross-section HRBF400 RC columns bending low-cycle reversed loading experiments are made. Effects of re- inforcement ratio, axial compression ratio and stirrup ratio on the seismic performance of RC columns are analyzed. Characteristic of hysteretic curve and skeleton curve are studied, and characteristic value and displacement ductility of each component are calculated. The results show HRBF400 RC columns have good seismic behavior. With the increasing of reinforcement ratio, yield load, peak load and ductility have correspondent improvement. Columns with high compression ratio have high peak load and yield load, but their skeleton curves after peak load decreases fast and have low ductility. Columns with low compression ratio have low peak load and low load, but their skeleton curves after peak load gradually decreases and those have good ductility. Seismic behavior and ductility of RC col- umns are improved with the increasing of stirrup ratio.

关 键 词：混凝土柱 细晶粒钢筋 抗震 延性 耗能 

分 类 号：TU375[建筑科学—结构工程] P315.92[天文地球—地震学]