无约束边缘构件混凝土剪力墙的轴压比限值研究  

THE STUDY ON THE ALLOWABLE AXIAL LOAD RATIO OF CONCRETE SHEAR WALL WITHOUT CONFINED BOUNDARY ELEMENTS

作　　者：梁兴文[1] 杨鹏辉[1] 邓明科[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,西安710055

出　　处：《工业建筑》2009年第9期67-70,共4页Industrial Construction

基　　金：国家自然科学基金资助项目(50678146);高等学校博士学科点专项科研基金资助项目(20070703002)

摘　　要：混凝土剪力墙轴压比限值的确定方法是目前尚未很好解决的问题之一。通过理论分析和数值计算,研究不设置约束边缘构件时矩形截面剪力墙的轴压比限值。研究结果表明:在混凝土极限压应变给定时,影响无约束边缘构件混凝土剪力墙轴压比限值的主要因素为剪力墙的高宽比和顶点目标位移角值,混凝土强度、竖向分布钢筋强度和配筋率的影响较小。据此提出了根据剪力墙的高宽比和顶点目标位移角值确定其轴压比限值的方法。方法简单实用,可供修订规范时参考。The problem of determining the allowable axial load ratio of concrete shear wall has not been completely solved. Through theoretical analysis and numerical calculation, the allowable axial load ratio of the rectangular cross-section shear wall without confined boundary elements has been studied. The results show that, to the given compre, ssive ultimate strain of concrete, the aspect ratio and the target top displacement ratio are main factors which influence the allowable axial load ratio of the shear wall, the concrete strength, the strength and the ratio of vertical distribution reinforcement are less. Accordingly, a method of determining allowable axial load ratio in accordance with the aspect ratio and the target top displacement ratio is proposed. The method is simple and practical, it can also be used for revising the design code.

关 键 词：钢筋混凝土剪力墙 轴压比限值 混凝土极限压应变 

分 类 号：TU398.2[建筑科学—结构工程]