박리를 고려한 지하박스구조물의 화재하중해석 II:내하력
Fire Loading Analysis of Underground Box Structure with Consideringof Concrete Spalling II:Load Carrying Capacity
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
본 논문에서는 1편에서 얻어진 온도분포와 박리시간이력을 이용하여 지하박스구조물의 열응력을 산정하고 이에 기반한 열모멘트를 산청하였다. 또한 이때의 온도분포를 바탕으로 구조물의 열적비선형성을 고려한 극한모멘트를 산정하여 구조물의 내하력을 산정하였다. 그 결과 상부슬래브의 부모멘트 구간은 단면의 온도경사에 의해서 발생하는 열모멘트에 의해 지배받는 것으로 나타났다. 반면 정모멘트 구간은 박리에 의해 화염에 노출된 철근의 항복응력에 의해 지배받는 것으로 나타났다.
Abstract
In this study, based on the temperature distribution and the spalling histories those obtained in the companion paper, the thermal stress and moments of underground box structure were estimated. Additionally, the ultimate sectional moment considering with the thermal nonlinearities of material were estimated and the load carrying capacity of underground box structure was also obtained. As results, the load carrying capacity of negative moment part was dominated by thermal moment that come from thermal gradient of the section. However, the load carrying capacity of the positive moment part was rules by the yield stress of rebar that exposed to the high temperature induced spalling phenomena.
참고문헌 (11)
- "박리를 고려한 지하박스구조물의 화재하중해석 I: 박리해석", 20(4), pp.477~483 (2007)
- "ABAQUS 6.5 User’s Manual" (2005), ABAQUS Inc
- "Analyses of Heated Concrete Spalling due to Restrained Thermal Dilation: Application to the ＂Chunnel＂ Fire", 132(10), pp.1124~1132 (2006)
- "Stability assessment of shallow tunnels subjected to fire load", 40, pp.745~763 (2005)
- "Effect of Force Temperature Paths on Behaviors of Reinforced Concrete Flexural Members", 128(3), pp.365~373 (2002)
- "A new coupling F.E. model for the simulation of thermal hydro- mechanical behaviour of concretes at high temperatures", 37, pp.422~432 (2004)
- "Numerical modeling of transport phenomena in reinforced concrete exposed to elevated temperatures", pp.597~608 (2005)
- "Structural fire performance of concrete and shotcrete tunnel liners", 131(12), pp.1920~1925 (2005)
- "An application of a damage constitutive model to concrete at high temperature and prediction of spalling", 42, pp.6550~6565 (2005)
- "The Chunnel’fire. I: Chemoplastic softening in rapidly heated concrete", 1253, pp.272~282 (1999)
- "The Chunnel’fire. II: Analysis of concrete damage", 1253, pp.283~289 (1999)