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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.36 No.4
- 발행연도
- 2020.1
- 수록면
- 383 - 398 (16page)
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This paper investigates the progressive collapse behavior of 3D steel-framed gravity buildings under fires with a cooling phase. The effect of fire protections and bracing systems on whether, how, and when a gravity building collapses is studied. It is found that whether a building collapses or not depends on the duration of the heating phase, and it may withstand a “short-hot” fire, but collapses under a mild fire or a “long-cool” fire. The collapse time can be conservatively determined by the time when the temperature of steel columns reaches a critical temperature of 550 °C. It is also found that the application of a higher level of fire protection may prevent the collapse of a building, but may also lead to its collapse in the cooling phase due to the delayed temperature increment in the heated members. The tensile membrane action in a heated slab can be resisted by a tensile ring around its perimeter or by tensile yielding lines extended to the edge of the frame. It is recommended for practical design that hat bracing systems should be arranged on the whole top floor, and a combination of perimeter and internal vertical bracing systems be used to mitigate the fire-induced collapse of gravity buildings. It is also suggested that beam-to-column connections should be designed to resist high tensile forces (up to yielding force) during the cooling phase of a fire.
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참고문헌 (50)
참고문헌 신청
AISC(American Institute of Steel Construction) / 2005 / Seismic Provisions for Structural Steel Buildings / AISC 341
Yasser Alashker / 2010 / Progressive Collapse Resistance of Steel-Concrete Composite Floors / Journal of Structural Engineering 136(10):1187~1196
Hosam M Ali / 2004 / Lateral displacement and collapse of single-story steel frames in uncontrolled fires / Engineering Structures 26(5):593~607
ASCE(American Society of Civil Engineers) / 2005 / Minimum Design Loads for Buildings and Other Structures / ASCE 7
CEN(European Committee for Standardization) / 2002 / Actions on structures, Part 1.2: General Actions – Actions on Structures Exposed to Fire / EN 1991-1-2
Yasser Alashker / 2010 / Progressive Collapse Resistance of Steel-Concrete Composite Floors / Journal of Structural Engineering 136(10):1187~1196
Hosam M Ali / 2004 / Lateral displacement and collapse of single-story steel frames in uncontrolled fires / Engineering Structures 26(5):593~607
ASCE(American Society of Civil Engineers) / 2005 / Minimum Design Loads for Buildings and Other Structures / ASCE 7
CEN(European Committee for Standardization) / 2002 / Actions on structures, Part 1.2: General Actions – Actions on Structures Exposed to Fire / EN 1991-1-2
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