Analysis on Coupled Propagation Characteristics of Two Collinear Cracks on Steel Bridge Deck to-U Rib Welding Seam

被引：0
|
作者：
Lu N. [1 ]
Wang H. [1 ]
Chen F. [2 ]
Wang K. [1 ]
Liu Y. [1 ]
机构：
[1] School of Civil Engineering, Changsha University of Science and Technology, Changsha
[2] School of Civil Engineering, Hunan University of Technology, Zhuzhou
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2022年 / 49卷 / 11期
基金：
中国国家自然科学基金;
关键词：
coupling effect; fatigue cracks propagation; multiple cracks; orthotropic steel bridge deck; stress intensity factors;
D O I：
10.16339/j.cnki.hdxbzkb.2022129
中图分类号：
学科分类号：
摘要：
Due to the aging of the in-service steel bridge deck, the size and density of widely distributed fatigue cracks at the weld gradually increase, leading to the interaction between the near-source multiple cracks. The coupling propagation and combination of multiple fatigue cracks are also promoted. In order to study the coupling propagation effect between multiple fatigue cracks, a numerical analysis model of two collinear fatigue cracks on steel bridge deck plate cover-U rib welding seam is established. Based on the theory of linear elastic fracture mechanics, ABAQUS-FRANC3D technology is used to calculate the stress intensity factor of single crack and two collinear cracks. The influence of crack spacing and size of interference crack on the propagation characteristics of the foundation crack is revealed, and the simulation conclusion is verified by a full-scale segmental test. The analysis results showed that the stress strengthening effect of collinear cracks cannot be ignored, compared with single crack. When all cracks have the same size, it is the most unfavorable case for multi-crack propagation. If the ratio of crack spacing to crack length s/c is less than 0.5, the stress intensity factor and crack growth rate are significantly affected by the coupling effect. © 2022 Hunan University. All rights reserved.
引用
收藏
页码：180 / 188
页数：8
相关论文
共 23 条
  • [1] ZHANG Q, LI Q．, Review on fatigue problems of orthotropic steel bridge deck［J］, China Journal of Highway and Transport, 30, 3, pp. 14-30, (2017)
  • [2] YUAN Z Z Y，, JI B H, YANG M Y，, Et al., Study on fatigue performance of welded joints for out-of-plane gusset in orthotropic steel bridge decks［J］, China Civil Engineering Journal, 49, 2, pp. 69-76, (2016)
  • [3] CHENG B, YE X H, CAO X E，, Et al., Experimental study on fatigue failure of rib-to-deck welded connections in orthotropic steel bridge decks［J］, International Journal of Fatigue, 103, pp. 157-167, (2017)
  • [4] ZHONG X, WANG J., Detection and treatment technology for Junshan Yangtze River Bridge steel bridge panel cracks［J］, MW Metal Forming, 4, pp. 40-43, (2018)
  • [5] LIU R, LIU Y Q, JI B H，, Et al., Hot spot stress analysis on rib-deck welded joint in orthotropic steel decks［J］, Journal of Constructional Steel Research, 97, pp. 1-9, (2014)
  • [6] LUO P J, ZHANG Q H, BAO Y, Et al., Fatigue evaluation of rib-to-deck welded joint using averaged strain energy density method［J］, Engineering Structures, 177, pp. 682-694, (2018)
  • [7] CHEN M W，, LI M, CHEN W M., Analysis of crack growth based on interaction integral method［J］, Journal of Hunan University （Natural Sciences）, 45, 4, pp. 74-81, (2018)
  • [8] ZHANG Q H, JIN Z K, LIU Y M，, Et al., 3-D simulation method for fatigue crack propagation in rib-to-deck welded joints of orthotropic steel bridge deck［J］, China Journal of Highway and Transport, 31, 1, pp. 57-66, (2018)
  • [9] WANG C S, TANG Y M，, Et al., Numerical fracture mechanical simulation of fatigue crack coupled propagation mechanism for steel bridge deck［J］, China Journal of Highway and Transport, 30, 3, pp. 82-95, (2017)
  • [10] KONOSU S, KASAHARA K., Multiple fatigue crack growth prediction using stress intensity factor solutions modified by empirical interaction factors［J］, Journal of Pressure Vessel Technology, 134, 1, (2012)
123