平面内弯矩作用下环口板加强T型圆钢管节点的承载力分析  

Study on Bearing Capacity of Circular Tubular T-Joints with Collar-Plate Reinforcement Loaded by In-Plane Bending Load

作　　者：陈德胜[1,2] 杨冬平[1] 蔡艳青[3] 龙凤乐[1] 牛更奇[1] 邵永波[3] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,青岛266555 [2]中国石化胜利油田技术检测中心,东营257062 [3]烟台大学土木工程学院,烟台264005

出　　处：《中国造船》2014年第3期84-93,共10页Shipbuilding of China

基　　金：胜利石油管理局博士后资助项目(YKB1208)

摘　　要：环口板加固管节点是一种比较新颖的加固方法,施工方便快捷而且加固效果显著。运用有限元方法对平面内弯矩作用下的环口板加固T型圆钢管节点的极限承载力进行了研究。对环口板加固T型圆钢管节点的面内弯曲承载力进行了参数分析,参数包括支管直径与主管直径比β,主管直径与2倍主管壁厚的比γ,环口板厚度与主管管壁厚之比τc和环口板长度与支管直径之比lc/d1等计算。结果表明,采用适当尺寸的环口板加固后的T型管节点的承载力相对于未加固T型管节点的承载力得到显著提高。改变环口板的厚度相对于改变环口板的长度对静力强度的提高更有效。最后,在参数分析的基础上提出了环口板加强型T型圆钢管节点在平面内弯矩作用下的承载力计算公式。Collar plate reinforcement is a new method for reinforcing tubular joints, and it is of fast fabrication and effective. Finite element method is used to investigate the static strength of collar plate reinforced circular hollow section（CHS） T-joints subjected to in-plane bending load. A study is conducted to analyze the effect of geometrical parameters, i.e. brace-to-chord diameter ratio β, collar-plate to chord wall thickness ratio τc, and collar-plate length to brace diameter ratio lc/d1, on the static strength of tubular T-joints. It is found that significant strength enhancement can be achieved for a collar plate reinforced tubular joint through suitable size design comparing with the un-reinforced one. Compared to the length of the collar plate, the thicknesses of the collar plate is more effective for improving the static strength of the T-joints. Finally, a parametric equation for predicting the load bearing capacity of circular tubular T-joints with collar plate reinforcement subjected to in-plane bending load is presented.

关 键 词：T型圆钢管节点 环口板 平面内弯矩 极限承载力 参数分析 

分 类 号：TU398[建筑科学—结构工程]