面外荷载作用下砖墙抗震性能试验研究  

Experimental Study on Seismic Behavior of Masonry Wall Subjected to Out-of-plane Loading

作　　者：杜晓霞[1,2] 李振宝[1] 陈东华[3] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [2]中国地震应急搜救中心,北京100049 [3]中国寰球工程公司华北规划设计院,石家庄072754

出　　处：《防灾减灾工程学报》2015年第3期290-295,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家"十二五"科技支撑计划课题(2011BAJ08B02);北京市教育委员会科技计划项目(JC00499920081)资助

摘　　要：针对村镇建筑震害中常见的砖墙平面外破坏或倒塌现象,采用气囊加载的方式,对6片足尺带翼缘砖墙进行平面外低周反复加载试验,研究了墙体的破坏特征、极限强度和位移、刚度变化和耗能能力,并考虑了墙宽、竖向荷载和加固措施等因素的影响。结果表明,带翼缘墙体的破坏形态与三边约束的混凝土板的破坏形态相似,开裂后仍能维持很大的侧向位移而不发生倒塌;竖向荷载可明显提高墙体的初始刚度和开裂强度;墙宽增大会使得墙体开裂强度和耗能能力下降,拐角采用混凝土预制板加固后,墙体耗能能力有所提高,中间增加混凝土构造柱后,墙体耗能能力进一步提高。Quasi-static cyclic experiment is conducted,in which six full-scale unreinforced brick masonry walls are subjected to out-of-plane uniform loading by using a system of airbags.The analysis of failure characteristics,crack patterns,ultimate strength and dissipation capacity,stiff degradation,and energy dissipation ability of the walls are presented in this paper.The influences of width of walls,vertical compression and strengthening measures are also discussed.The results indicate that the fracture lines of walls are similar to the yield lines of a 3-way reinforced concrete slab.The walls can still keep larger displacement without collapsing after cracking,the vertical load can improve the initial stiffness and cracking strength,width increases can decrease the cracking strength and dissipation capacity,and the dissipation capacity of the wall can be increased after reinforced by the precast concrete slab at the corner,especially reinforced by the constructional column in the middle of wall.

关 键 词：砖墙 面外荷载 抗震性能 拟静力试验 

分 类 号：TU317[建筑科学—结构工程] TU362