期刊论文

Analysis of Cutting and Welding Residual Stresses in Joints of Diaphragms and U-Ribs of Steel Box Girder

中文

桥梁建设

1003-4722

2019

49

5

27-32

10.3969/j.issn.1003-4722.2019.05.005

Projects of National Natural Science Foundation of China (51708047, 51778069); Project of Natural Science Foundation of Hunan Province (2019JJ50670); Innovative Project of Key Disciplines with Advantages and Characteristics of Civil Engineering in Changsha University of Science and Technology (18ZDXK11).

本校为第一机构

为研究钢箱梁正交异性桥面板横隔板与U肋交接处的残余应力分布规律,采用Abaqus有限元软件模拟横隔板的热切割和焊接过程,分析横隔板与U肋交接处热残余应力的分布特征,探讨切割速度和焊接速度对横隔板弧形切口处残余应力的影响。结果表明:横隔板弧形切口处产生切向残余拉应力,其值超过钢材屈服强度;焊接在横隔板与U肋焊接区局部范围引起沿焊缝方向的残余拉应力,且焊缝尾端的应力集中更为明显;弧形切口残余应力区宽度随切割速度的增加而减小,残余拉应力随焊接速度的增加而增大;选用较快的横隔板切割速度和较慢的焊接速度可减小弧形切口处残余应力分布宽度和应力值。

To study the distribution of residual stresses in the joints of diaphragms and U-ribs in orthotropic steel deck of steel box girder, the thermal cutting and welding processes of the diaphragms are simulated by using finite element software Abaqus. The distribution of thermal residual stresses in the joints of diaphragms and U-ribs are analyzed, and the effects of cutting and welding speed on the residual stresses in the arc notches of the diaphragm are also explored. The results show that residual tensile stresses in the tangential direction oc...