伸臂层处剪力墙的受力与变形研究  

Study on force and deformation of shear wall at outrigger

作　　者：周云[1] 林绍明[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《地震工程与工程振动》2014年第5期108-117,共10页Earthquake Engineering and Engineering Dynamics

基　　金：广东省自然科学基金团队项目(8351009101000001);广州市高校"羊城学者"首席科学家项目(10A026S);广东省教育部产学研项目(20090912);广州市教育系统创新学术团队项目(穗教科[2009]11号)

摘　　要：对带伸臂框架-核心筒结构中伸臂层处剪力墙进行受力分析,推导伸臂层处剪力墙受力层间位移角的计算公式,采用PERFORM-3D有限元软件分别对带减震层伸臂和加强层伸臂框架-核心筒结构模型进行非线性动力时程反应分析,研究普通楼层和伸臂层中各竖向构件的剪力分配与变形规律。结果表明:伸臂层处剪力墙以剪切变形为主,其受力变形的方向与普通楼层处剪力墙受力变形的方向相反,采用弦转角作为伸臂层处剪力墙的变形性能指标较为合理;伸臂层处剪力墙的受力层间位移角计算公式合理可行,其计算结果与数值分析结果吻合较好;与加强层伸臂相比,设置屈曲约束支撑减震层伸臂既能减小结构的侧向变形,又能合理控制伸臂层处剪力墙的受力变形。Based on theoretical analysis of force and deformation,the calculation formula of physical story drift for shear wall on outrigger story was investigated. The nonlinear time history analysis under frequent,basic and rare earthquakes was carried out for a frame-core structure with energy-dissipation story and strengthened story model by the aid of PERFORM-3D program. The force distribution and deformation of vertical components on ordinary story and outrigger story were investigated. The results show that shear wall at outrigger mainly undergoes shearing deformation and its physical story drift could be measured by chord rotation. The physical deformation direction for shear walls on outrigger story and ordinary story are opposite. The reliability and results of calculation formula of physical story drift are proved. Compared to structure with strengthened story,the setting of buckling restraining braces of outrigger plays a major role in reducing the lateral displacement of the structure and the physical deformation of shear walls on energy-dissipation story can be controlled reasonably.

关 键 词：伸臂 框架-核心筒结构 受力层间位移角 屈曲约束支撑 减震层 加强层 

分 类 号：TU973.17[建筑科学—结构工程] TU973.31