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A Study on Fatigue Crack at Coped Stringers of the Plate Girder Subway-Bridge  

Jo, Jae Byung (경기대학교 토목.환경 공학부)
Publication Information
Journal of Korean Society of Steel Construction / v.16, no.5, 2004 , pp. 713-724 More about this Journal
Abstract
A fatigue crack found at the coped stringer of the old dismantled Dangsan Subway Bridge was numerically simulated. A model of a single span of the plate girder bridge with its beam elements was created and analyzed in order to obtain the nominal stress history caused by trains. A detailed FEM analysis of the coped stringer was conducted using a shell element model. A fracture mechanical model was used to estimate crack propagation. The stress intensity factors were calculated using the J-Integral method. The simulation with some reasonable assumptions showed that the calculated crack lengths were comparable to those found on the site.
Keywords
plate girder subway-bridge; coped stringer; fatigue crack; calculation of fatigue crack growth; stress intensity factor;
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