边缘约束构件配箍特征值对剪力墙轴压比限值影响的分析  

INFLUENCE OF THE CHARACTERISTIC VALUE OF STIRRUP CONTENT IN BOUNDARY ELEMENTS ON ALLOWABLE AXIAL LOAD RATIO FOR CONCRETE STRUCTURAL WALLS

作　　者：白亮[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,西安710055

出　　处：《工业建筑》2009年第4期44-48,共5页Industrial Construction

基　　金：国家自然科学基金资助项目(05678146);高等学校博士学科点专项科研基金项目(20070703002)

摘　　要：轴压比是影响剪力墙抗震性能的主要因素,我国现行规范规定的剪力墙轴压比限值未考虑边缘约束构件配箍特征值、延性比需求等因素的影响。通过研究剪力墙的延性比、边缘约束构件配箍特征值等因素对剪力墙轴压比限值的影响,得到了三者之间的关系。研究结果表明,适当增加约束区约束钢筋的配筋率可以提高剪力墙的轴压比限值。给出了满足具体的延性需求、对应不同约束钢筋配箍特征值的剪力墙轴压比限值。Axial load ratio is a main factor affecting the seismic performance of concrete structural walls. However, the influences of ductility demand and the characteristic value of stirrup content in boundary elements are not considered in the allowable axial load ratio specified by the current codes in China. The influence of the characteristic value of stirrup content λ on the displacement ductility ratio μ△ and allowable axial load ratio, n, for concrete structural walls is studied. It is obtained that the relationships among the ductility ratio, axial load ratio and the characteristic value of stirrup content. The results show that increasing the boundary confinement ratio of the walls can raise allowable axial load ratio. At last, allowable axial load ratio is proposed with various confinement ratios, which is satisfied for certain ductility demand.

关 键 词：延性 剪力墙 配箍率 轴压比 

分 类 号：TU318[建筑科学—结构工程]