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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.38 No.2
- 발행연도
- 2021.1
- 수록면
- 121 - 139 (19page)
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초록· 키워드
오류제보하기
Ultra-high strength concrete (UHSC) encased steel columns are receiving growing interest in high-rise buildings owing to their economic and architectural advantages. However, UHSC encased steel columns are not covered by the modern fire safety design code. A total of 14 fire tests are conducted on UHSC (120 MPa) encased steel columns under constant axial loads and exposed to ISO-834 standard fire. The effect of load ratio, slenderness, stirrup spacing, cross-section size and concrete cover to core steel on the fire resistance and failure mode of the specimens are investigated. The applicability of the tabulated method in EC4 (EN 1994-1-2-2005) and regression formula in Chinese code (DBJ/T 15-81-2011) to fire resistance of UHSC encased steel columns are checked. Generally, the test results reveal that the vertical displacement-heating time curves can be divided into two phases, i.e. thermal expansion and shortening to failure. It is found that the fire resistance of column specimens increases with the increase of the cross-section size and concrete cover to core steel, but decreases with the increase of the load ratio and slenderness. The EC4 method overestimates the fire resistance up to 186% (220 min), while the Chinese code underestimates it down to 49%. The Chinese code has a better agreement than EC4 with the test results since the former considers the effect of the load ratio, slenderness, cross section size directly in its empirical formula. To estimate the fire resistance precisely can improve the economy of structural fire design of ultra-high strength concrete encased steel columns.
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등록된 정보가 없습니다.
참고문헌 (23)
참고문헌 신청
2016 / ASTM E 8M/E8M Standard test method for tension testing of metallic materials / ASTM International
Eun Gyu Choi / 2012 / Performance of fire damaged steel reinforced high strength concrete (SRHSC) columns / Steel and Composite Structures, An International Journal 13(6):521~537
2011 / DBJ/T 15-81-2011 Code for fire resistance design of concrete structures in buildings / Department of Housing and UrbanRural Development of Guangdong Province
Yong Du / 2019 / Application of the Non-Contact Video Gauge on the Mechanical Properties Test for Steel Cable at Elevated Temperature / Applied Sciences 9(8):1670
Yong Du / 2020 / Experimental study on the spalling behaviour of ultra-high strength concrete in fire / Construction and Building Materials 258:120334
Eun Gyu Choi / 2012 / Performance of fire damaged steel reinforced high strength concrete (SRHSC) columns / Steel and Composite Structures, An International Journal 13(6):521~537
2011 / DBJ/T 15-81-2011 Code for fire resistance design of concrete structures in buildings / Department of Housing and UrbanRural Development of Guangdong Province
Yong Du / 2019 / Application of the Non-Contact Video Gauge on the Mechanical Properties Test for Steel Cable at Elevated Temperature / Applied Sciences 9(8):1670
Yong Du / 2020 / Experimental study on the spalling behaviour of ultra-high strength concrete in fire / Construction and Building Materials 258:120334
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