无加劲冷成型方钢管-H形钢梁翼缘板焊接节点管壁变形初始刚度分析  

Analysis on initial stiffness of weld-up assemblage composed of no-diaghragm cold-formed tube and flange plate of H-shaped beam

作　　者：张梁[1] 陈以一[1] 王拓[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《建筑结构学报》2011年第5期32-38,共7页Journal of Building Structures

基　　金：同济大学与宝山钢铁股份有限公司合作课题:宝钢节能环保型钢结构住宅体系研究

摘　　要：对于无加劲方钢管柱-H形钢梁节点,在H形梁端部弯矩作用下方钢管柱壁变形是节点变形的主要组成部分。为考察无加劲方钢管柱-H形钢梁连接节点的管壁变形特性,在11个试件试验研究基础上,依据单调拉伸荷载作用得到各个试件的管壁变形值。基于经典弹性板壳理论推导管壁变形解答,得到管壁变形的解析表达式,并以此计算管壁变形刚度。通过管壁变形刚度的试验值、拟合式计算值以及理论解答值的比较,验证了利用板壳理论推导解析解答方法的可行性。研究结果表明:影响管壁变形刚度的主要因素是钢管管壁宽厚比;由于冷成型钢管截面存在弯角,管壁计算宽厚比变小,冷成型钢管柱管壁变形刚度较焊接组合截面柱明显提高。The deformation of tube wall under the moment at the H-shaped beam end is the main component of the total joint deformation.In order to establish a mathematical answer of prediction formula for the initial stiffness of the joint,the test data of 11 weld-up assemblages composed of cold-formed tube and flange plate of H-shaped beam were used.After compared with the result of tests and fitting formula,it is reasonable to deduce the resolution of tube wall stiffness based on the elastic theory.The main parameter affecting the tube wall stiffness is the ratio of width to thickness of tube.Because of the existence of round corner of cold-formed tube,the true ratio of width to thickness of tube flange will be smaller,so the tube wall stiffness of specimens composed of cold-formed tube will be quite larger than that composed of weld-up box section.

关 键 词：梁柱节点 冷成型方钢管 管壁面外变形 应力分布 弹性刚度 三角级数解答 

分 类 号：TU391.01[建筑科学—结构工程]