FraMCoS 7 2010 Jeju, South Korea

3D FE analysis of fasteners at elevated temperatures

In the present paper the results of 3D FE investigation on headed studs at elevated temperatures are presented. For modeling of concrete under fire conditions a thermo-mechanical model (Ožbolt et al. 2005, 2008) is used. In the parametric FE analysis…

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Year 2010
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Abstract

In the present paper the results of 3D FE investigation on headed studs at elevated temperatures are presented. For modeling of concrete under fire conditions a thermo-mechanical model (Ožbolt et al. 2005, 2008) is used. In the parametric FE analysis of single headed stud anchors loaded in tension, the influence of embedment depth, heating time, edge distance and number of surfaces exposed to heating was investigated. In case of anchor groups the influence of embedment depth, anchor spacing and heating time was examined. The results of the FE analysis show that the resistance of single anchors and anchor groups with large edge dis- tance under fire conditions are primarily dominated by embedment depth. Anchors with small embedment depth are very sensitive to fire and may even fail under design load. In case of small edge distance and multi- ple sides heating of the concrete body the anchor resistance is additionally affected by edge distance.