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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.18 No.4
- 발행연도
- 2015.1
- 수록면
- 1,045 - 1,062 (18page)
이용수
초록· 키워드
오류제보하기
Concrete-filled circular t steel tubular joints (CFSTJs) in practice are frequently subjected to fluctuated loadings caused by wind, earthquake and so on. As fatigue crack is sensitive to such cyclic loadings, assessment on performance of CFSTJs with crack-like defect attracts more concerns because both high stress concentration at the brace/chord intersection and welding residual stresses along weld toe cause the materials in the region around the intersection to be more brittle. Once crack initiates and propagates along the weld toe, tri-axial stresses in high gradient around the crack front exist, which may bring brittle fracture failure. Additionally, the stiffness and the load carrying capacity of the CFSTJs with crack may decrease due to the weakened connection at the intersection. To study the behaviour of CFSTJs with initial crack, experimental tests have been carried out on three full-scale CFCST T-joints with same configuration. The three specimens include one uncracked joint and two corresponding cracked joints. Load-displacement and load-deformation curves, failure mode and crack propagation are obtained from the experiment measurement. According to the experimental results, it can be found that he load carrying capacity of the cracked joints is decreased by more than 10% compared with the uncracked joint. The effect of crack depth on the load carrying capacity of CFCST T-joints seems to be slight. The failure mode of the cracked CFCST T-joints represents as plastic yielding rather than brittle fracture through experimental observation.
목차
등록된 정보가 없습니다.
참고문헌 (23)
참고문헌 신청
Burdekin, F. M. / 2002 / The fracture behaviour of welded tubular joint-an ESIS TC1-3 round robin on failure assessment methods Part III-UK BS7910 methodology / Eng. Fract Mech 69(10):1119~1127
Chen, B.C. / 2009 / Experimental study on ultimate bearing capacity of CFST directly-welded K-joints / China Ci 42(12):91~98
Chiew, S. P. / 2004 / Fatigue performance of cracked tubular T joints under combined loads. I: Experimental / Struct. Eng 130(4):562~571
Chiew, S. P. / 2007 / Fatigue behaviors of square-to-square hollow section T-joint with corner crack. I: Experimental studies / Eng. Fract Mech 74(5):703~720
Chiew, S. P. / 2009 / Fatigue study of partially overlapped circular hollow section K-joints Part 2: Experimental study and validation of numerical models / Eng. Fract. Mech 76(15):2408~2428
Chen, B.C. / 2009 / Experimental study on ultimate bearing capacity of CFST directly-welded K-joints / China Ci 42(12):91~98
Chiew, S. P. / 2004 / Fatigue performance of cracked tubular T joints under combined loads. I: Experimental / Struct. Eng 130(4):562~571
Chiew, S. P. / 2007 / Fatigue behaviors of square-to-square hollow section T-joint with corner crack. I: Experimental studies / Eng. Fract Mech 74(5):703~720
Chiew, S. P. / 2009 / Fatigue study of partially overlapped circular hollow section K-joints Part 2: Experimental study and validation of numerical models / Eng. Fract. Mech 76(15):2408~2428
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