钢桁架(钢梁)与混凝土墙间单剪板连接的约束弯矩研究  

Research on restraining moment of single-plate connection between RC wall and steel truss(steel girder)

作　　者：黄嘉[1] 苗启松[1] 侯光瑜[1] 

机构地区：[1]北京市建筑设计研究院,北京100045

出　　处：《建筑结构学报》2006年第2期15-19,共5页Journal of Building Structures

基　　金：北京市科委科技项目(953300801);北京市规委科研项目(199802001)

摘　　要：钢-混凝土组合结构设计中,通常钢梁或钢桁架与混凝土墙体之间的单剪板连接是按照铰接计算的,实际上,这种连接中存在不可忽略的约束弯矩。该约束弯矩可表示为钢桁架(钢梁)端部的剪力和折算偏心距的乘积。本文以北京LG大厦为背景,针对钢桁架和实腹钢梁与混凝土墙体之间的单剪板连接进行了大量有限元模拟分析,发现折算偏心距随连接板厚度和螺栓群惯性矩的增大而增大,但不呈线性关系,此外,当连接板进入弹塑性后,折算偏心距随荷载增大而减小。本文根据分析结果拟合得到了适用于钢桁架或实腹钢梁与混凝土墙体之间连接约束弯矩的计算公式。Single-plate connection is usually considered as pin connection in the design of SRC composite structure. In fact, restraining moment exists in the connection. This restraining moment can be defined as the shear force of truss（girder） end multiplied by the equivalent eccentricity. Using the Beijing LG Building design as an example, finite element analyses of single-plate connection between steel truss （steel girder） and RE wall are carried out. Results show that the equivalent eccentricity increases as the plate thickness and the moment of inertia of the bolt group increase, but the relationship is not linear. The equivalent eccentricity decreases as the load increases when the shear plate reaches the plastic stage. Based on analysis results, a formula for the calculation of restraining moment of single-plate connection between steel truss （ steel girder） and RC wall is derived.

关 键 词：钢桁架与混凝土墙连接节点 单剪板连接 约束弯矩 有限元 

分 类 号：TU973.257[建筑科学—结构工程]