| Title |
Hot Spot Stress of Concrete-filled Circular Hollow Section N-joints Subjected to Axial Loads |
| Keywords |
CFT(concrete filled steel tube);CHS(circular hollow section);tubular section joints;Hot spot stress;SCF(stress concentration factors);콘크리트 충전강관;N형 이음부;핫스폿 응력;응력집중계수 |
| 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. |