Multiscale fatigue crack growth and life prediction for complex details of steel bridges

被引：0
|
作者：
Cui C. [1 ]
Zheng Q. [1 ]
Yuan X. [1 ]
Zhang N. [2 ]
Zhang Q. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd., Shanghai
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2024年 / 54卷 / 03期
关键词：
dislocation dipole model; fatigue damage evolution; long crack propagation; short crack nucleation and growth; steel bridge;
D O I：
10.3969/j.issn.1001-0505.2024.03.008
中图分类号：
学科分类号：
摘要：
Since the traditional macroscopic phenomenology cannot describe the multiscale evolution process of fatigue damage in steel bridges from micro to macro,a method for describing the multiscale fatigue crack growth and life prediction in complex structures of steel bridges is proposed. Firstly,combining with the microscopic crystal plasticity constitutive model,a microscopic short crack nucleation and growth model is established based on the energy dissipation theory. Meanwhile,a model for macro long crack growth is established by combining the linear elastic fracture mechanics. On this basis,taking the welding structure details of typical longitudinal rib and roof plate of steel bridge as the research object,the whole process of nucleation and propagation of micro short crack and macro long crack is simulated and verified using the existing fatigue test. The numerical simulation results are basically in agreement with those of the test. It is shown that the proposed method for predicting multiscale fatigue crack spanning and life has good applicability for fatigue damage evolution and assessment of details of steel bridges with complex structures. © 2024 Southeast University. All rights reserved.
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页码：578 / 585
页数：7
相关论文
共 34 条
  • [1] Zhang Q H, Bu Y Z, Li Q., Review on fatigue problems of orthotropic steel bridge deck[J], China Journal of Highway and Transport, 30, 3, (2017)
  • [2] Zhang Q H, Li J, Yuan D Y, Et al., Fatigue model tests of orthotropic steel bridge deck of Shenzhen-Zhongshan Link[J], China Civil Engineering Journal, 53, 11, (2020)
  • [3] Zhang Q H, Cui C, Bu Y Z, Et al., State-of-the-art review of fatigue of steel bridge in 2019, Journal of Civil and Environmental Engineering, 42, 5, pp. 147-158, (2020)
  • [4] Steel,concrete and composite bridges. Part 10:Code of practice for fatigue:BS 5400, (1980)
  • [5] LRFD bridge design specifications, (2004)
  • [6] Eurocode 3: Design of steel structures. Part 1-9:Fatigue:BS EN http:/ / journal. seu. edu. cn 1993-1-9:2005, (2005)
  • [7] Zhuang M L, Miao C Q., Analysis on structural parameter optimization of orthotropic steel bridge deck based on fatigue performance, Journal of Southeast University (Natural Science Edition), 48, 5, (2018)
  • [8] Liu Y M, Zhang Q H, Cui C, Et al., Numerical simulation method for 3D fatigue crack propagation of orthotropic steel bridge deck[J], China Journal of Highway and Transport, 29, 7, (2016)
  • [9] Sun B., Simulation and analysis method of failure process of engineering structures due to trans-scale damage evolution, (2016)
  • [10] Zhao C F., Analysis method and application of multiscale damage evolution of weld specimen with meso-defects, (2016)
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