钢筋网约束矩形钢管混凝土柱-混凝土梁节点的核心区受压极限承载力研究  

BEARING CAPACITY OF CONCRETE-FILLED RECTANGULAR STEEL TUBE COLUMN-BEAM JOINTS CONFINED BY STEEL MESHES IN JOINT ZONE

作　　者：汤序霖[1] 陈庆军[1,2] 蔡健[1,2] 张津[1] 左志亮[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]亚热带建筑科学国家重点试验室,广东广州510641

出　　处：《工程力学》2016年第7期167-175,183,共10页Engineering Mechanics

基　　金：华南理工大学中央高校基本科研业务费专项项目(2014ZZ0026);华南理工大学亚热带建筑科学国家重点实验室自主研究课题项目(2015ZC18);国家自然科学基金青年基金项目(51408230);广东省自然科学基金项目(S2013040015140)

摘　　要：为研究钢筋网约束矩形钢管混凝土柱-梁节点的核心区受压极限承载力,对8个带上下短柱的弱节点试件进行了加载试验,探讨节点区的破坏形态、峰值承载力以及节点内钢筋的应变特点。试验结果表明:轴压和偏压试件的节点区破坏形态不同;随着初始偏心与节点高度的增大,试件的峰值承载力明显降低,但节点宽度对极限承载力影响不明显。在规范配筋混凝土局压承载力计算公式的基础上,引入节点高度影响系数,并考虑荷载的偏心作用,建立节点区受压承载力计算公式。该公式与试验结果较为符合。To investigate the compression bearing capacity of concrete filled rectangular steel tubular column-beam joints confined by multi-layer steel meshes in the joint zone, eight specimens designed to adhere to the ＂weak connection＂ scenario were tested. The failure modes, bearing capacity, and characteristics of steel strain in the joint were studied. The results indicate that the specimens under axial and eccentric compression had different failure modes. With increasing eccentricity or height of the joint, the bearing capacity of the specimen decreased. However, the influence of joint width on bearing capacity was minimal. Based on the formula from GBS0010-2010, a formula for calculating the compression bearing capacity is put forward in which a joint height coefficient is introduced. The comparison between the results of the calculation and experiments shows that they are consistent with each other.

关 键 词：钢管混凝土 柱-梁节点 不贯通钢管 钢筋网 偏压 

分 类 号：TU398.9[建筑科学—结构工程]