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Fire Resistance Of High Strength Concrete Columns Subjected To Moderate Axial Restraint

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Ali, Faris and Nadjai, Ali (2008) Fire Resistance Of High Strength Concrete Columns Subjected To Moderate Axial Restraint. Journal of Applied Fire Science, 18 (1). pp. 79-103. [Journal article]

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Abstract

The first part of this article presents the results of an experimental researchexecuted on 42 high strength concrete columns. The parametric experimental study investigates the performance of high strength concrete columns under three loading levels 0.2, 0.4, and 0.6 subjected to moderate axial restraint degree = 0.1 and exposed to two heating rates. The second part of the article presents a three-dimensional finite element model of the reinforced concrete columns taking into account exposure to high temperatures. The effects of tension softening is included in the model and based on Hordijik, Cornelissen,and Rienhardt curve. The concrete columns were modeled taking into account the embedded reinforcement, and cracks formation using smeared cracks model which allowed a non-linear transient structural analysis to be conducted.The comparison of the results of the FEM and the performed tests showed a reasonable agreement and divergence in some cases due to concrete spalling. An assessment of the compressive stresses generated due to axial restraint under fire is also presented in the article. The experimental and the FEM study showed that imposing axial restraint against concrete columns expansion may reduce explosive spalling of concrete in fire.

Item Type:Journal article
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Fire Safety and Engineering Research and Technology Centre (FireSERT)
ID Code:15170
Deposited By:Professor Faris Ali
Deposited On:22 Aug 2010 21:33
Last Modified:24 Jun 2011 11:08

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