混凝土空心砌块砌体抗震抗剪强度  

Seismic Shear Strength of Concrete Hollow Block Masonry

作　　者：吕伟荣[1,2] 施楚贤[3] 刘锡军[2] 胡张齐[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]湖南科技大学土木工程学院,湖南湘潭411201 [3]湖南大学土木工程学院,长沙410082

出　　处：《土木建筑与环境工程》2012年第5期1-5,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：湖南省教育厅优秀青年项目(10B035);国家标准砌体结构设计规范管理组资助课题

摘　　要：针对现行《建筑抗震设计规范》(GB 50011-2010)和《砌体结构设计规范》(GB 50003-2001)中关于混凝土空心砌块砌体抗震抗剪设计强度取值上存在的问题,在砌体剪压破坏区理论的基础上,结合中国已有58片混凝土砌块砌体墙的剪压试验结果,提出了具有下降段的剪压复合作用下混凝土空心砌块砌体抗震抗剪强度平均值曲线公式,并推导出具有可靠度保证的混凝土砌块砌体抗震抗剪强度设计值公式。与现行规范相比,提出的抗震抗剪强度设计值公式不仅解决了现行规范间的不统一,而且较好的实现了剪压复合作用下混凝土空心砌块砌体剪摩、剪压和斜压3类破坏形态的模拟,避免了现行规范中混凝土砌块砌体抗震抗剪设计强度取值的不合理和不安全,可运用于高层配筋砌块砌体结构设计。According to some problems existed in current Chinese codes for design of seismic shear strength of concrete hollow block masonry,the curve of shear strength of concrete hollow block masonry under shear-compression loading,including descent segment,was presented by theory of failure region and test results of 58 concrete block masonry walls under shear-compression loading.And the design seismic shear strength formula of concrete hollow block masonry,which has reliability guarantee,was deduced.Compared with current Chinese codes,the design seismic shear strength formula of concrete hollow block masonry not only can perfectly simulate the shear-friction,shear-compression and diagonal compression failure modes,but also avoid unreasonable and unsafe calculation of seismic shear strength of concrete hollow block masonry,which can be applied to design of tall reinforced concrete masonry structures.

关 键 词：剪压复合作用 混凝土空心砌块砌体 抗震抗剪强度 下降段 破坏形态 

分 类 号：TU398[建筑科学—结构工程]