配置大间距HRB500纵筋的C80混凝土柱抗震性能试验  

Experimental study on seismic performance of C80 concrete columns with large spacing HRB500 reinforcement

作　　者：唐伟明 任宝双 张春霖 姚卫国 Tang Weiming;Ren Baoshuang;Zhang Chunlin;Yao Weiguo(Architectural Design and Research Institute of Tsinghua University Co.Ltd,Beijing 100084,China)

机构地区：[1]清华大学建筑设计研究院有限公司,北京100084

出　　处：《建筑科学》2020年第5期59-67,139,共10页Building Science

基　　金：国家重点研发计划“工业化建筑设计关键技术”(编号2016YFC0701500)。

摘　　要：为分析配置大间距高强度纵筋的高强度混凝土柱的抗震性能,本文对四个采用配置大间距HRB500高强度纵筋的C80高强度混凝土柱进行了低周往复加载试验。试件分为是否设置中间构造纵筋及拉筋,是否增大箍筋配筋率以及常规配筋的对比试件。结论:配置大间距HRB500高强度纵筋的C80高强度混凝土柱的滞回曲线比较饱满,屈服荷载和峰值荷载与普通配筋形式试件相当,骨架曲线下降段可以保持稳定;为保良好的延性,应设置构造纵筋和中间拉筋;承载力可以用现行规范规定的方法设计计算,并具有一定的强度储备;提高箍筋配筋率的试件滞回曲线更加饱满。In order to analyze the seismic performance of concentrated reinforced columns with high-strength steel bars and high-strength concrete,four centralized reinforced columns with HRB500 high strength longitudinal bar and C80 high strength concrete are tested under low cycle reciprocating loading. The specimens are divided into columns with or without structural reinforcement in the middle,with or without increasing the reinforcement ratio of stirrups,and common columns. In conclusion,the hysteretic curves of HRB500 reinforced concrete columns with high strength longitudinal bars C80 high strength concrete are full,yield load and peak load are equivalent to those of ordinary reinforced specimens,and the descending section of skeleton curve can keep stable;in order to maintain good ductility under high axial compression ratio,structural reinforcement in the middle and intermediate stirrups should be set up;the bearing capacity can be calculated by the method in the current specifications,which has a good strength reserve;the hysteretic curve of specimens with higher stirrup reinforcement ratio is fuller.

关 键 词：HRB500 C80混凝土柱 大间距纵筋 抗震性能 装配式结构 

分 类 号：TU317[建筑科学—结构工程]