|本期目录/Table of Contents|

[1]傅一晟,刘永健,姜 磊,等.焊接工艺对钢管混凝土拱桥拱肋相贯节点残余应力的影响[J].建筑科学与工程学报,2024,41(06):121-139.[doi:10.19815/j.jace.2022.11108]
　FU Yisheng,LIU Yongjian,JIANG Lei,et al.Effect of welding process on residual stress of intersecting joint of arch rib of concrete-filled steel tube arch bridge[J].Journal of Architecture and Civil Engineering,2024,41(06):121-139.[doi:10.19815/j.jace.2022.11108]
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
41卷
期数:
2024年06期
页码:
121-139
栏目:
桥隧工程
出版日期:
2024-11-30

文章信息/Info

Title:
Effect of welding process on residual stress of intersecting joint of arch rib of concrete-filled steel tube arch bridge
文章编号:
1673-2049(2024)06-0121-19
作者:
傅一晟1,刘永健1,2,3,姜 磊1,2,3,霰建平3,4,李昊天3,4,肖 军3,4
(1. 长安大学 公路学院,陕西 西安 710064; 2. 长安大学 公路大型结构安全教育部工程研究中心,陕西 西安 710064; 3. 长安大学 陕西省“四主体一联合”桥梁工程智能建造技术校企联合研究中心,陕西 西安 710064; 4. 中交二公局工程设计研究院,陕西 西安 710199)
Author(s):
FU Yisheng1, LIU Yongjian1,2,3, JIANG Lei1,2,3, XIAN Jianping3,4, LI Haotian3,4, XIAO Jun3,4
关键词:
桥梁工程;  钢管混凝土拱桥;  焊接残余应力;  预热处理;  焊后热处理
Keywords:
bridge engineering;  concrete-filled steel tube arch bridge;  welding residual stress;  preheating treatment;  post-weld heat treatment
分类号:
U441.4
DOI:
10.19815/j.jace.2022.11108
文献标志码:
A
摘要:
为研究焊接工艺对钢管混凝土拱桥拱肋相贯节点残余应力的影响,基于建立的热力顺序间接耦合的有限元分析方法,对拱肋相贯节点的焊接温度场和残余应力场进行数值模拟,结合文献试验结果验证了有限元分析方法的准确性。然后对湘渝高速双堡桥拱脚处拱肋相贯节点进行焊接温度场和残余应力场的数值模拟。在此基础上,通过参数分析研究对比了不同焊接热输入和焊接速度以及进行焊前预热和焊后热处理等不同焊接工艺对拱肋相贯节点不同位置的残余应力影响。结果表明:不同焊接热输入和焊接速度下拱肋相贯节点的焊接残余应力分布规律基本一致,变化规律表现为焊接残余应力与焊接热输入呈正相关关系,与焊接速度呈负相关关系; 随着焊接热输入的减小和焊接速度的提高,拉压残余应力整体减小,拱肋相贯节点经过焊前预热150～200 ℃以后,残余应力的峰值应力总体降低4%以上,但焊前预热对残余应力分布基本没有影响,更高的焊前预热温度能更有效地降低残余应力的峰值应力; 拱肋相贯节点经过550～650 ℃保温温度下保温4 h的焊后热处理以后,焊接残余应力总体降低幅度在40%以上,更高的保温温度能更有效地降低焊接残余应力; 钢管混凝土拱桥拱肋相贯节点可通过减小焊接热输入和提高焊接速度的焊接工艺、焊前预热处理和焊后热处理来减小焊接残余应力。
Abstract:
In order to study the effect of welding process on residual stress of intersecting joint of arch rib of concrete-filled steel tube arch bridge, an indirectly sequential coupled thermal-mechanical finite element analysis method was established to numerically simulate the temperature field and residual stress field of intersecting joint of arch rib, and the accuracy of the finite element analysis method was verified by comparing with the experimental results in literatures. Furthermore, the intersecting joint of arch rib at arch foot of Shuangbao bridge on Xiangyu expressway was numerically simulated to analyze the temperature field and residual stress field. On the basis, the effect of different welding process parameters such as welding heat input, welding speed, preheating treatment and post-weld heat treatment on welding residual stress changing at different positions of the intersecting joint of arch rib were compared and analyzed. The result shows that the distribution of welding residual stress is basically the same in different welding heat input and welding speed. Welding residual stress is positively correlated with welding heat input, and is negatively correlated with welding speed. With the decrease of welding heat input and the increase of welding speed, residual stress in tension and compression reduces in general. When the intersecting joint of arch rib is subjected to the preheating treatment at the temperatures of 150-200 ℃, the decrease of total residual peak stress is above 4%. But the preheating treatment has little effect to the distribution of welding residual stress. Increasing the preheating temperature reduces the residual peak stress efficiently. When the intersecting joint of arch rib was subjected to the post-weld heat treatment at the temperatures of 550-650 ℃ for a holding period of 4 h, the decrease of total welding residual stress is above 40%. Increasing the post-weld heat treatment temperature reduces residual stress efficiently. The intersecting joint of arch rib of the concrete-filled steel tube arch bridge can reduce welding residual stress by decreasing welding heat input, increasing welding speed, preheating treatment and post-weld heat treatment.

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备注/Memo

备注/Memo:
收稿日期:2023-11-29 投稿网址:http://jace.chd.edu.cn
基金项目:国家自然科学基金项目(52478125); 陕西省留学人员科技活动择优资助项目(2021-11); 中央高校基本科研业务费专项资金项目(300102213207)
通信作者:刘永健(1966-),男,工学博士,教授,博士生导师,E-mail:liuyongjian@chd.edu.cn。
Author resume: LIU Yongjian(1966-),male,PhD,professor,E-mail:liuyongjian@chd.edu.cn.
更新日期/Last Update: 2024-12-10