[1]曹宝雅,丁幼亮.板件厚度对钢桥面板顶板纵肋焊接残余应力的影响分析[J].东南大学学报(自然科学版),2016,46(3):565-571.[doi:10.3969/j.issn.1001-0505.2016.03.018]
 Cao Baoya,Ding Youliang.Influence analysis of plate thickness on welding residual stress of steel deck deck-rib[J].Journal of Southeast University (Natural Science Edition),2016,46(3):565-571.[doi:10.3969/j.issn.1001-0505.2016.03.018]
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板件厚度对钢桥面板顶板纵肋焊接残余应力的影响分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第3期
页码:
565-571
栏目:
土木工程
出版日期:
2016-05-20

文章信息/Info

Title:
Influence analysis of plate thickness on welding residual stress of steel deck deck-rib
作者:
曹宝雅丁幼亮
东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Cao Baoya Ding Youliang
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
钢桥 焊接残余应力 疲劳 板件厚度 顶板-纵肋 统一分布模型
Keywords:
steel bridge welding residual stress fatigue plate thickness deck-rib unified distribution model
分类号:
TU318;U442
DOI:
10.3969/j.issn.1001-0505.2016.03.018
摘要:
为考察板件厚度变化对正交异性钢桥面板顶板-纵肋焊接残余应力的影响规律,采用ANSYS有限元软件的生死单元技术和热-结构耦合分析方法,对顶板-纵肋焊接细节进行了数值模拟,得到其焊接残余应力分布,并重点分析了板件厚度变化对焊接残余应力的影响规律.研究结果表明,横向残余应力在焊趾和焊根附近达到最大值,其数值约为材料屈服强度的2/3;纵向残余应力在焊缝中心处达到最大值,其数值已超过材料屈服点.板件厚度变化对纵向残余应力影响不明显,对横向残余应力影响较大,当顶板件厚度由12 mm增大到20 mm时,横向残余应力最大值增加45%.基于分析结果,建立了不同板件厚度的焊接残余应力统一分布模型,为顶板-纵肋焊接残余应力的研究与设计提供参考.
Abstract:
In order to study the influence rule of the plate thickness variation on the welding residual stress of the deck-rib of the orthotropic steel bridge, the element birth and death technology in the finite element software ANSYS and the thermal-structure coupling analysis method are used to simulate the welding details of the deck-rib, and the distribution of the welding residual stress is obtained. The influence rule of the plate thickness variation on the residual stress is mainly analyzed. The results show that the transverse residual stress reaches the maximum near the weld toe and the weld roof, and the corresponding value is about two-thirds of the material yield strength. The longitudinal residual stress reaches the maximum in the weld center, and the corresponding value is larger than the material yield strength. The plate thickness variation has little effect on the longitudinal residual stress, but large effect on the transverse residual stress. The maximum transverse residual stress increases by 45% when the thickness of the top plate increases from 12 to 20 mm. According to these results, the unified distribution model for the welding residual stress with different plate thicknesses is established, providing a reference for research and design of the welding residual stress.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2015-12-03.
作者简介: 曹宝雅(1988—),女,博士生;丁幼亮(联系人),男,博士,教授,博士生导师,civilding@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)青年科学家专题资助项目(2015CB060000)、国家自然科学基金资助项目(51578138)、中央高校基本科研业务费专项资金资助项目(2242016K41066).
引用本文: 曹宝雅,丁幼亮.板件厚度对钢桥面板顶板纵肋焊接残余应力的影响分析[J].东南大学学报(自然科学版),2016,46(3):565-571. DOI:10.3969/j.issn.1001-0505.2016.03.018.
更新日期/Last Update: 2016-05-20