Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)
- 2005.05b
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- Pages.21-24
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- 2005
Numerical analysis of high-strength concrete exposed elevated temperature
고온에 노출된 고강도 콘크리트 기둥의 수치해석
Abstract
A computational analysis of hygro-thermal and mechanical behaviour of concrete column at high temperature is presented. The objective of this study is to develop a finite difference model that simulates coupled heat and transport phenomena in reinforced concrete structures exposed to rapid heating conditions such as fires. The theoretical basis for the integrated finite difference method is presented to describe a powerful numerical technique for solving of fluid flow in porous media. The numerical results predict the phenomena of 'moisture clog' and the explosive spalling of concrete under fire. The investigations show that high-strength concrete(HSC) and normal-strength concrete(NSC) exposed to high temperature have different pore pressure buildup dependent on porosity, permeability and moisture contents. HSC has more possibility than NSC on spalling.
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