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http://dx.doi.org/10.12652/Ksce.2010.30.2A.113

Hot Spot Stress of Concrete-filled Circular Hollow Section N-joints Subjected to Axial Loads  

Kim, In-Gyu ((주)대우건설 기술연구원)
Chung, Chul-Hun (단국대학교 토목환경공학과)
Kim, Young-Jin ((주)대우건설 기술연구원)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.2A, 2010 , pp. 113-120 More about this Journal
Abstract
The use of Concrete filled circular hollow steel section (CFCHS) members in bridge design is a relatively new concept. The most important part of the design and durability of such structures is the design and the construction of the joints. In the design of recently constructed steel-concrete composite bridges using CFCHS truss girders for the main load carrying structure, the fatigue verification of the tubular spatial truss joints was a main issue. Welded CFCHS joints are very sensitive to fatigue because the geometric discontinuities of the welds lead to a high stress concentration. New research done on the fatigue behaviour of such joints has focused on CFCHS N-joints, directly welded, with finite element analysis method. A commercial software, ABAQUS, is adopted to perform the finite element analysis on the N-joints. This paper is main focused on these topics, including hot spot stress.
Keywords
CFT(concrete filled steel tube); CHS(circular hollow section); tubular section joints; Hot spot stress; SCF(stress concentration factors);
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