高性能混凝土剪力墙恢复力模型研究  

Study on restoring force model of high-performance concrete shear walls

作　　者：李响[1] 梁兴文[1] 

机构地区：[1]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《地震工程与工程振动》2010年第5期42-48,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50678146;50908187;51078305);高等学校博士学科点专项科研基金项目(20070703002);陕西省重点学科建设专项资金(E01001;E01003)

摘　　要：高性能混凝土剪力墙的侧向刚度较大,变形能力较差。为了增强其侧向变形能力,通常在剪力墙截面两端设置约束边缘构件。根据15个设置边缘约束构件的高性能混凝土剪力墙弯曲(弯曲剪切)破坏的试验结果,以屈服点、峰值点和极限点将此种剪力墙的力-位移骨架曲线简化为三线型模型;基于平截面假定,分别推导了屈服荷载、峰值荷载及极限荷载的表达式;公式推导中考虑了边缘约束构件的影响。根据理论分析和试验数据,建立了骨架曲线各阶段的刚度计算公式。从理论值与试验值的比较可以看出,基于平截面假定所得到的屈服荷载和峰值荷载的计算值均与试验值接近。考虑了卸载时的刚度退化,并建立了适合高性能混凝土剪力墙的恢复力模型。High-performance concrete shear wall structure has great lateral stiffness,and poor deformation capacity.In order to increase its lateral deformation capacity,we usually set constraints in the end-zones of the cross-section.According to the test results of 15 high-performance concrete shear wall＇s bending（bending shear） failure,the force-displacement skeleton curve of shear wall is reduced to the three linear model by yield point,peak point and limit point.Based on the plane-section assumption,we derived the formula of yield load,peak load and limit load respectively.The formulas consider the impact of the edge constraint component.From the comparison between the theoretical value and the experimental value,both yield load and peak load values are close to the experimental values respectively.We considered the unloading stiffness degradation,and established the suitable restoring force model for high-performance concrete shear walls.

关 键 词：高性能混凝土剪力墙 骨架曲线 刚度退化 滞回规则 

分 类 号：P315.97[天文地球—地震学]