节点区柱钢管不连通式钢管混凝土柱-梁节点轴压承载力  

THE AXIAL COMPRESSION BEARING CAPACITY OF THE CONCRETE FILLED STEEL TUBULAR COLUMN-BEAM JOINT WITH THE COLUMN TUBE DISCONTINUOUS IN JOINT ZONE

作　　者：陈庆军[1,2] 蔡健[1,2] 徐刚[3] 吴轶[4] 

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]亚热带建筑科学国家重点试验室,广州510641 [3]广东省建筑设计研究院,广州510010 [4]广州大学土木工程学院,广州510000

出　　处：《工程力学》2008年第9期170-175,共6页Engineering Mechanics

基　　金：广东省自然科学基金项目(020965);广州市教育局科技项目(62063);华南理工大学青年自然科学基金项目(304-E5040510)

摘　　要：对节点区柱钢管不连通式钢管混凝土柱-梁节点在轴压下节点核心区的受力特点进行了分析,指出主要的影响因素为混凝土强度、节点横截面面积与钢管面积的比值、节点环筋的数量、节点高度。在局部承压理论的基础上,根据约束混凝土理论,提出多重箍筋对内核混凝土的约束力逐重叠加的思想,并引入节点高度影响系数,建立该种节点轴压承载力计算公式。计算结果与试验结果比较,两者吻合良好。The mechanics characteristic of the concrete filled steel tubular column-beam joint in which the column tube is discontinuous under axial compression is analyzed. The main influence factors are figured out, which include the strength of concrete, the ratio of the area of the joint section and the area of the steel tube, the amount of the steel ring bars and the height of the joint. Based on the theory of local compression, as well as according to the confined concrete theory, the concept of gradual superposition of the confinement from multilayer steel ring bars to the core concrete is presented, the joint height coefficient is introduced, and then the formula for calculating the ultimate axial capacity is put forward. The comparison between the results of calculation and experiment shows that they are consistent with each other.

关 键 词：钢管混凝土 柱-梁节点 不连通钢管 轴心受压 局部承压 约束混凝土 

分 类 号：TU398[建筑科学—结构工程] TU528.59