带窗间墙扶壁柱砖混结构教学楼抗震性能的试验研究  

EXPERIMENTAL STUDY ON SEISMIC PERFORMANCE OF BRICK-CONCRETE SCHOOL BUILDING WITH INCREASED REINFORCEMENT RATIO OF PILASTERS WITHIN PIERS

作　　者：吴昊[1] 赵世春[1] 许浒[1] 张蓬勃[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《工业建筑》2014年第1期45-48,93,共5页Industrial Construction

基　　金：国家科技支撑计划项目(2009BAJ28B01);国家教育部东南大学博士生国内访学基金资助项目(BSFX2009-01)

摘　　要：为了解砖混结构教学楼在窗间墙扶壁柱增强配筋条件下的抗震性能和地震破坏机理,按照1/2的缩尺比例设计制作了1个2层砖混结构试验模型,在窗间墙中设置扶壁柱并增强柱截面的配筋,采用拟静力试验对模型的破坏特点、延性和耗能能力以及窗间墙的破坏模式和纵墙的宏观破坏机制等进行了研究。结果表明,窗间墙扶壁柱配筋率较高时,扶壁柱与两侧砖砌体的协调变形能力差,导致模型的破坏位置集中,模型表现为层间破坏模式,窗间墙发生剪切破坏并出现垮塌,纵墙的宏观破坏具有"强梁弱柱"特征,模型的延性和耗能能力均较差。因此,砖混结构教学楼的抗震设计应合理控制窗间墙中扶壁柱的配筋率。Quasi-static test on a half-scale two-story brick-concrete house model was carried out in order to investigate the seismic performance,and earthquake damage mechanism of brick-concrete school buildings with pilastered piers. The reinforcement ratio of pilasters within piers was increased. Failure characteristics, ductility and energy dissipation capacity of the model, as well as failure modes of piers and failure mechanism of longitudinal walls were analyzed. The results indicate that increasing reinforcement ratio of pilaster to some extent can decrease the deformation compatibility between pilaster and brick masonry, resulting in damage of the model mainly concentrating in piers. A soft story mechanism occurs with piers fail in shear failure. Longitudinal walls of the model exhibit strong spandrel- weak pier failure mechanism. And some piers are severely damaged or even collapsed resulting in the poor ductility and energy dissipation capacity. Therefore, controlling the reinforcement ratio of pilaster within piers reasonably is of crucial importance in seismic design of brick-concrete school buildings.

关 键 词：砖混结构 壁柱窗间墙 增强扶壁柱配筋 拟静力试验 抗震性能 

分 类 号：TU398.5[建筑科学—结构工程] TU352.11