Monitoring Estimation and Finite Element Analysis of Thick Plate Steel Beam Joints Welding Process

被引：0
|
作者：
Wang X. [1 ,2 ]
Liu H. [1 ]
Zhou T. [2 ,3 ]
Tong X. [1 ]
机构：
[1] School of Civil Engineering, Tianjin University, Tianjin
[2] Key Laboratory of Coast Civil Structure and Safety of Ministry of Education(Tianjin University), Tianjin
[3] School of Architecture, Tianjin University, Tianjin
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2018年 / 51卷
关键词：
Construction monitor; Finite element analysis; Temperature field; Thick plate welding; Welding residual stress;
D O I：
10.11784/tdxbz201804047
中图分类号：
学科分类号：
摘要：
The study of welding temperature and residual stress of thick plate steel beam joints was based on a project in Tianjin. A set of monitoring programs for different thickness(35 mm, 50 mm, 80 mm, 100 mm)were carried out, including the comprehensive monitoring of different paths of transverse and longitudinal residual stresses, welding temperature and the concrete condition at supports. Further, the influence of thickness on welding temperature and residual stress was studied. Based on the real-time welding parameters, the numerical models of thick steel beam welding were established, and the change of residual stress at the welding center with time was analyzed. The result shows that the welding is a process of heat transfer with non-uniform transient temperature field, and there exists the hysteresis phenomenon. The highest temperature in the direction of the plate width appears in the center of plate, which is the same as the distribution characteristics of transverse residual stress. With the increase of the thickness of welding steel plate, transverse and longitudinal residual stresses increases. When the thickness is over 80 mm, the growth rate of residual stress decreases, which means that the multi-pass welding is an effective method for reducing residual stress. © 2018, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.
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页码：27 / 34
页数：7
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