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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.27 No.4
- 발행연도
- 2018.1
- 수록면
- 509 - 523 (15page)
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This paper presents experimental results on the residual bond-slip behavior of high strength concrete-filled square steel tube (HSCFST) after elevated temperatures. Three parameters were considered in this test: (a) temperature (i.e., 20°C, 200°C, 400°C, 600°C, 800°C); (b) concrete strength (i.e., C60, C70, C80); (c) anchorage length (i.e., 250 mm, 400 mm). A total of 17 HSCFST specimens were designed for push-out test after elevated temperatures. The load-slip curves at the loading end and free end were obtained, in addition, the distribution of steel tube strain and the bond stress along the anchorage length were analyzed. Test results show that the shape of load-slip curves at loading ends and free ends are similar. With the temperature constantly increasing, the bond strength of HSCFST increases first and then decreases; furthermore, the bond strength of HSCFCT proportionally increases with the anchoring length growing. Additionally, the higher the temperature is, the smaller and lower the bond damage develops. The energy dissipation capacity enhances with the concrete strength rasing, while, decreases with the temperature growing. What is more, the strain and stress of steel tubes are exponentially distributed, and decrease from the free end to loading end. According to experimental findings, constitutive formula of the bond slip of HSCFST experienced elevated temperatures is proposed, which fills well with test data.
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참고문헌 (28)
참고문헌 신청
AIJ / 1997 / Recommendations for design and construction of concrete filled steel tubular structure
Farhad Aslani / 2015 / Predicting the axial load capacity of high-strength concrete filled steel tubular columns / Steel and Composite Structures, An International Journal 19(4):967~993
2005 / BS 540025, Steel concrete and composite bridges: Part 5: Code of Practice for the Design of Composite Bridges / British Standard Institute
2004 / BS EN 1994-1-1, Eurocode 4: Design of composite steel and concrete structures: Part1.1, General rules and rules for buildings / British Standards Institution
Chiang, C.H. / 2003 / Time-temperature analysis of bond strength of a rebar after fire exposure / J. Cement Concrete Res. 33(10):1651~1654
Farhad Aslani / 2015 / Predicting the axial load capacity of high-strength concrete filled steel tubular columns / Steel and Composite Structures, An International Journal 19(4):967~993
2005 / BS 540025, Steel concrete and composite bridges: Part 5: Code of Practice for the Design of Composite Bridges / British Standard Institute
2004 / BS EN 1994-1-1, Eurocode 4: Design of composite steel and concrete structures: Part1.1, General rules and rules for buildings / British Standards Institution
Chiang, C.H. / 2003 / Time-temperature analysis of bond strength of a rebar after fire exposure / J. Cement Concrete Res. 33(10):1651~1654
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