Effects of welding details on ultra-low cycle fatigue performance of T-welded joint

被引：0
|
作者：
Yu W.-T. [1 ]
Xie X. [1 ]
Cheng C. [1 ]
机构：
[1] College of Civil Engineering and Architecture, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2021年 / 55卷 / 01期
关键词：
Arlequin algorithm; Local plastic strain history; Multi-scale analysis method; Parametric analysis; T-welded joint; Ultra-low cycle fatigue;
D O I：
10.3785/j.issn.1008-973X.2021.01.004
中图分类号：
学科分类号：
摘要：
T-welded joint was adopted as a research object and a structural multi-scale calculation program was proposed based on Arlequin algorithm on the general finite element program Abaqus platform in order to analyze the effects of welding details on ultra-low cycle fatigue performance of steel structures. Local elastic-plastic finite element analysis of T-welded joints were conducted, and the local plastic strain characteristics were analyzed. The effects of welding details, such as weld toe radius, unfused length of thick steel plate and unevenness of weld toe surface on local plastic strain history were compared. The ultra-low cycle fatigue characteristics of T-welded joints were discussed by qualitatively using Coffin-Manson model. The numerical calculation results show that weld toe position is the vulnerable position of T-welded joints, and the influence of the unfused length of the steel plates on the local plastic strain history of the welded part is negligible. The local plastic strain history is more sensitive to the change of the weld toe radius, and the increase of the weld toe radius can significantly improve the ultra-low cycle fatigue performance of the structure under cyclic loading. The flatness of weld surfaces is an important factor on the plastic strain history of welding areas. Sharp dents can significantly reduce the ultra-low cycle fatigue performance of welded joints whereas a smoother welding surface is beneficial to reduce the local plastic strain and improve the ultra-low cycle fatigue strength of joints. Copyright ©2021 Journal of Zhejiang University (Engineering Science). All rights reserved.
引用
收藏
页码：31 / 37and95
页数：3764
相关论文
共 23 条
  • [1] GATES W E, MORDEN M., Professional structural engineering experience related to welded steel moment frames following the Northridge earthquake, Structural Design of Tall and Special Buildings, 5, 1, pp. 29-44, (1996)
  • [2] NAKASHIMA M, INOUE K, TADA M., Classification of damage to steel buildings observed in the 1995 Hyogoken-Nanbu earthquake, Engineering Structures, 20, 4, pp. 271-281, (1998)
  • [3] ZHOU Hui, WANG Yuan-qing, SHI Yong-jiu, Et al., Fracture analyses of welded details in beam-to-column connections using micromechanics-based models, Engineering Mechanics, 32, 5, pp. 37-50, (2015)
  • [4] GE H B, KANG L, TSUMURA Y., Extremely low-cycle fatigue tests of thick-walled steel bridge piers, Journal of Bridge Engineering, ASCE, 18, 9, pp. 858-870, (2013)
  • [5] TATEISHI K, CHEN T, HANJI T., Extremely low cycle fatigue assessment method for un-stiffened cantilever steel columns, Doboku Gakkai Ronbunshuu A, 64, 2, pp. 288-296, (2008)
  • [6] USAMI T, WANG C L, FUNAYAMA J., Low-cycle fatigue tests of a type of buckling restrained braces, Procedia Engineering, 14, 14, pp. 956-964, (2011)
  • [7] LIAO Yan-hua, XIE Xu, TANG Zhan-zhan, Low cycle fatigue properties and fracture mechanism of Q345qC steel and its welded joint, Journal of Zhejiang University: Engineering Science, 52, 1, pp. 73-81, (2018)
  • [8] TATEISH K, HANJI T, MINAMI K., A prediction model for extremely low cycle fatigue strength of structural steel, International Journal of Fatigue, 29, 5, pp. 887-896, (2007)
  • [9] XUE L., A unified expression for low cycle fatigue and extremely low cycle fatigue and its implication for monotonic loading, International Journal of Fatigue, 30, 10, pp. 1691-1698, (2008)
  • [10] KANVINDE A M, DEIERLEIN G G., Cyclic void growth model to assess ductile fracture initiation in structural steels due to ultra-low cycle fatigue, Journal of Engineering Mechanics, 133, 6, pp. 701-712, (2007)
123