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Distortion Induced Fatigue Analysis of Steel Bridges
Induced forces in secondary steel bridge members such as diaphragms and cross-bracing can cause out-of-plane distortion in webs that may lead to fatigue cracking. Such cracking is most likely to occur if the distortion must be accommodated in a short length of the web, such as in the gap between the end of transverse stiffeners and girder flanges, thats because the web gap is subject to double curvature. In this paper, the numerical analysis models of the curved continue steel bridges were established using ANSYS software to calculate the fatigue stress at the web gaps. The numerical analysis results show that both the bottom web gap at middle span area and the top web gap at supported were poor fatigue details, and web thickness and web gap depth give the great affection on the out-of-plane distortion fatigue stress at web gaps of curved steel bridges.
Distortion Induced Fatigue Analysis of Steel Bridges
Induced forces in secondary steel bridge members such as diaphragms and cross-bracing can cause out-of-plane distortion in webs that may lead to fatigue cracking. Such cracking is most likely to occur if the distortion must be accommodated in a short length of the web, such as in the gap between the end of transverse stiffeners and girder flanges, thats because the web gap is subject to double curvature. In this paper, the numerical analysis models of the curved continue steel bridges were established using ANSYS software to calculate the fatigue stress at the web gaps. The numerical analysis results show that both the bottom web gap at middle span area and the top web gap at supported were poor fatigue details, and web thickness and web gap depth give the great affection on the out-of-plane distortion fatigue stress at web gaps of curved steel bridges.
Distortion Induced Fatigue Analysis of Steel Bridges
Wang, Chun-Sheng (author) / Yan, Sheng-Long (author) / Cheng, Jun (author)
2012
4 Seiten
Conference paper
English
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