隔板贯通式钢管混凝土节点有限元分析  

Finite Element Analysis on Concrete-Filled Steel Tubular Column Connections with Through Diaphragm

作　　者：张广泰[1] 韩建红[1] 荣彬[2] 

机构地区：[1]新疆大学建筑工程学院,乌鲁木齐830047 [2]天津大学建筑工程学院,天津300072

出　　处：《建筑钢结构进展》2016年第2期26-33,共8页Progress in Steel Building Structures

基　　金：国家自然科学基金(51268054)

摘　　要：基于ANSYS软件建立了隔板贯通式钢管混凝土梁柱节点有限元模型,研究了剪切破坏模式下节点核心区的传力机制,以及节点核心区组件几何尺寸和楼板作用对节点抗剪承载力的影响。结果表明,在剪切破坏模式下,节点剪力主要由核心区钢管腹板和混凝土承担,隔板和钢管翼缘的作用主要是传递梁端弯矩,核心区混凝土则以斜压杆机制抗剪;隔板厚度和核心区钢管壁厚对节点抗剪承载力有较大影响,而钢梁翼缘厚度和宽度的影响相对较小;楼板能提高节点抗剪承载力,并能影响节点核心区的破坏模式。继而利用优化设计为节点试件的方案设计提供一定参考。Based on finite element model established using ANSYS software,a few issues on concrete-filled steel tubular column connections are studied,including load transfer mechanism of panel zone under shear failure mode,influence of component size in panel zone,and slab effect to the shear capacity of connection.Results show that under shear failure mode the shear capacity is mainly provided by the web of steel tube and core concrete.The contribution of steel tube flange and diaphragm is to transfer the beam-end moment,and the core concrete develops diagonal strut mechanism to resist shear force.The thicknesses of diaphragm and steel tube in panel zone have significant influence on shear capacity,while the influence of thickness and width of beam flange is relatively small.The concrete slab can improve the shear capacity and affect the failure mode of panel zone.At last,this paper provides a reference for future study on connection specimen design through an optimization design.

关 键 词：隔板贯通式节点 有限元分析 剪切破坏 传力机制 

分 类 号：TU398[建筑科学—结构工程]