Computers and Concrete

  • 제1권1호
  • /
  • Pages.31-46
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  • 2004
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Numeric simulation of near-surface moisture migration and stress development in concrete exposed to fire

  • Consolazio, Gary R. (Department of Civil & Coastal Engineering, University of Florida) ;
  • Chung, Jae H. (Department of Civil & Coastal Engineering, University of Florida)
  • 투고 : 2003.05.06
  • 심사 : 2003.09.15
  • 발행 : 2004.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

A methodology is presented for computing stresses in structural concrete members exposed to fire. Coupled heat and moisture migration simulations are used to establish temperature, pore pressure, and liquid-saturation state variables within near-surface zones of heated concrete members. Particular attention is placed on the use of coupled heat and multiphase fluid flow simulations to study phenomena such as moisture-clogging. Once the state variables are determined, a procedure for combining the effects of thermal dilation, mechanical loads, pore pressure, and boundary conditions is proposed and demonstrated. Combined stresses are computed for varying displacement boundary conditions using data obtained from coupled heat and moisture flow simulations. These stresses are then compared to stresses computed from thermal analyses in which moisture effects are omitted. The results demonstrate that moisture migration has a significant influence on the development of thermal stresses.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation

참고문헌

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피인용 문헌

  1. Numerical modeling of transport phenomena in reinforced concrete exposed to elevated temperatures vol.35, pp.3, 2005, https://doi.org/10.1016/j.cemconres.2004.05.037
  2. An anisotropic thermomechanical damage model for concrete at transient elevated temperatures vol.363, pp.1836, 2005, https://doi.org/10.1098/rsta.2005.1589