K型、KK型间隙方钢管节点静力工作性能的试验研究  

Experimental research on static behavior of square hollow section K- and KK-joints

作　　者：武振宇[1] 张壮南[1] 丁玉坤[1] 张耀春[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《建筑结构学报》2004年第2期32-38,共7页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50108006);哈尔滨工业大学校基金资助(HIT.2001.48)。

摘　　要：为研究多平面直接焊接方钢管节点性能,本文对6个K型和8个KK型直接焊接方钢管节点进行了静力试验研究。通过对节点破坏模式和极限承载力的分析,研究了几何参数(β、g)、支杆作用位置和空间作用对节点极限承载力的影响。采用ANSYS程序中四节点板壳单元对试验节点进行了弹塑性、大挠度有限元分析。将试验数据、CIDECT公式计算结果及有限元计算结果进行了比较。研究结果表明,采用ANSYS分析方钢管节点是可行的。空间作用对KK型方钢管节点承载力有明显的影响,支杆偏离弦杆纵向轴线作用使节点承载力有一定程度的提高。In order to investigate the static behavior of directly welded rectangular hollow section (RHS) joints, a static test program on directly welded K and KK joints made of square hollow section (SHS) was carried out, 6 K joints and 8 KK joints were tested. The effect of geometric parameters (β、g), branch position and multi planar action on the limit capacity of RHS KK joints was studied by analyzing the failure modes and limit capacity of the joints. Making use of finite element package program ANSYS, in which four nodes shell element was employed, elastic plastic large deflection finite element analysis of the experimental joints was conducted. The experimental data were compared with the results acquired by CIDECT formula and finite element analysis. It was proved that ANSYS is feasible to analyze the static behavior of RHS joints. Multi planar action between branch planes has significant effect on the load carrying capacity of RHS joints. The branch position deviating from the longitudinal axes of the chord can improve the load carrying capacity of RHS joints.

关 键 词：K型方钢管节点 KK型方钢管节点 极限承载力 支杆 方钢管结构 

分 类 号：TU392.3[建筑科学—结构工程]