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A Study on the Fatigue Design of Joint Detail of Vertical Stiffener in Two-Girder Bridge  

Kwon, Soon Cheol (한국해양대학교 건설환경공학부 BK21 WIS팀)
Kyung, Kab Soo (한국해양대학교 건서환경공학부)
Park, Jin Eun (한국해양대학교 토목환경공학부)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.1, 2009 , pp. 93-103 More about this Journal
Abstract
Two-girder bridge is composed of primary members such as deck slab and main girder, and secondary member such as cross beam, vertical and horizontal stiffeners etc,. Two-girder bridge is prescribed as a non-redundant load path structure in the ASSHTO and the Korean Highway Bridge Design Code. Such structure is that if one girder is damaged, problems of function and safety of the bridge are caused. From the reasons, fatigue cracks in two-girder bridge can affect safety of the bridge seriously. Therefore, in this paper, fatigue evaluation was performed at connection parts of vertical stiffener and web with radius of curvature of scallop of vertical stiffener and thickness of web as variables. Such joint is known as a detail which has high possibility of fatigue crack in the bridge. Based upon the analytical results, preferable joint detail in terms of fatigue and simple empirical formula for fatigue evaluation of the detail were suggested.
Keywords
Two-Girder Bridge; Fatigue Crack; Vertical Stiffener; Radius of Curvature of Scallop; Thickness of Web;
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