焊接方钢管T型节点的初始刚度分析  

Initial stiffness analysis of T-joints of welded square steel tube

作　　者：郭华 肖建春[1,2] 盛夏 张瀚铭 刘聪 陈扬 GUO Hua;XIAO Jianchun;SHENG Xia;ZHANG Hanming;LIU Cong;CHEN Yang(Research Center of Space Structures,Guizhou University,Guiyang 550025,China;Key Laboratory of Structural Engineering of Guizhou Province,Guiyang 550025,China)

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550025 [2]贵州省结构工程重点实验室,贵州贵阳550025

出　　处：《山东理工大学学报（自然科学版）》2025年第2期55-61,共7页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：节点的初始转动刚度对构件之间的内力分布影响显著,然而现有计算角焊缝焊接方钢管T型节点初始转动刚度的组件法并未考虑角焊缝的影响,造成对初始转动刚度的低估。本文基于原始组件法,提出修正组件法来计算该类节点的初始转动刚度,重点考虑角焊缝尺寸的影响,并将修正组件法与原始组件法和试验进行对比以验证其可靠性。结果表明:本研究提出的修正组件法计算得到的节点初始转动刚度与试验中节点初始转动刚度之比的平均值为0.997,协方差为0.013;对于原始组件法,节点初始转动刚度的计算值与试验值之比的平均值为0.679,协方差为0.016。本文提出的修正组件法比较精确,且与原始组件法相比具有更佳的预测性能。The initial rotational stiffness of joints significantly affects the distribution of internal forces between structural members.However,the existing component method for calculating the initial rotational stiffness of T-joints of welded square steel tubes made by fillet welds does not take into account the effect of fillet welds,which often results in underestimation of the initial rotational stiffness.Therefore,this study proposes a modified component method based on the original component method to calculate the initial rotational stiffness of such joints,with emphasis on the influence of the fillet weld size.The modified component method is compared with both the original component method and tests to verify its reliability.The results show that the average ratio of the initial rotational stiffness calculated by the proposed modified component method to that measured in the test is 0.997,with a coefficient of variation of 0.013.In contrast,the average ratio obtained by the original component method is only 0.679,with a coefficient of variation of 0.016.Thus,the modified component method proposed in this paper demonstrates greater accuracy and better predictive performance over the original component method.

关 键 词：角焊缝焊接 T型节点 初始转动刚度 组件法 

分 类 号：TU391[建筑科学—结构工程]