芯柱式构造柱约束墙体抗震性能拟静力试验研究  

Pseudo-static test study on seismic behavior of masonry wall restrained by core-tie-columns

作　　者：郑妮娜[1,2] 李英民[1,2] 刘凤秋 

机构地区：[1]重庆大学,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]重庆市设计院,重庆400015

出　　处：《土木工程学报》2013年第S1期202-207,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(50908242);重庆市城乡建设委员会科技项目(城科字2009第(3)号)

摘　　要：芯柱式构造柱是一种施工简便,造价较低的新型构造柱。为考察芯柱式构造柱约束墙体的抗震性能,进行11个墙体试件(包括3片无约束墙,2片现浇构造柱约束墙和6片芯柱式构造柱约束墙)的低周往复荷载试验。对比分析芯柱式构造柱约束墙体、无约束墙体、现浇构造柱约束墙体的破坏特征,两种构造柱中的纵筋、箍筋及构造柱与墙体间的拉接筋的应变,并分组对比各种墙体的滞回耗能性能。试验结果表明,芯柱式构造柱可对开裂后的墙体起到有效约束,改善墙体的破坏形态;芯柱式构造柱纵筋、箍筋及其与墙体间的拉结筋在墙体严重破坏阶段可达到屈服;芯柱式构造柱约束墙体的滞回环形状多为梭形,耗能能力较强。芯柱式构造柱与传统现浇构造柱的功能相近,可较好地提高墙体的抗震性能。Core-tie-column is a new style of tie-column with the advantage of making easier and costing cheaper. In order to study the seismic behavior of wall restrainted by core-tie-columns,pseudo-static testes of 11 specimens,which concluded 3 specimens without restraints,2 specimens restrainted by cast-in-place tie-column and 6 specimens restrainted by core-tie-columns,were carried out,and the failure characteristics,strain of longitudinal bar,grid bar in tie-columns,hysteretic curves and dissipative of the specimens were investigated and contrasted. It is shown that,the restraints of core-tie-columns on the wall is effective so that the failure mode of the wall has been improved,the strains of most longitudinal bars and grid bars of core-tie-columns and tie bars between wall and core-tie-columns intend to yield strain. The hysteretic curves of the walls restrainted by core-tie-column are more dissipative. Above all,as similar as cast-in-place tie-columns,the core-tie-columns can improve the seismic behavior of the masonry wall greatly.

关 键 词：砌体结构 芯柱式构造柱 低周往复荷载试验 破坏特征 钢筋应变 滞回耗能 

分 类 号：TU352.11[建筑科学—结构工程]