Abstract：The variable section part of the right angle mutation type steel crane runway girder is prone to fatigue failure. In order to accurately evaluate the fatigue behavior of crane runway girder, the three-dimensional numerical simulation of crack growth is carried out by using the Paris formula based on linear elastic fracture mechanics. The crack growth characteristics and fatigue life were simulated and the feasibility of this method was verified. According to the failure characteristics of T-shaped fillet weld in crane runway girder with variable section, different values of crack depth and shape in initial state are given. The effects of spacing between end stiffening rib and variable cross section, height of support cross section, length of bottom flange connection, thickness of end seal plate and insertion plate on crack growth and fatigue strength at variable cross section are comprehensively analyzed. In this paper, the recommended range of main influencing parameters is proposed, which can provide reference basis for similar engineering design.
Keywords: Right angle mutation type; Steel crane runway girder; Three-dimensional crack growth; Fatigue life; Influential parameter
胡宝琳1，周磊1，庄继勇2，徐庆1. 直角突变式钢吊车梁裂纹扩展及疲劳寿命研究[J]. 振动与冲击, 2022, 41(14): 135-144.
HU Baolin1,ZHOU Lei1,ZHUANG Jiyong2,XU Qing1. Crack propagation and fatigue life of right angle mutation type steel crane runway girders. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(14): 135-144.
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