Analytical model for predicting the load–deflection curve of post-fire reinforced-concrete slab

Publication date: Available online 21 September 2018

Source: Fire Safety Journal

Author(s): Yong Wang, Wenxuan Guo, Zhaohui Huang, Bangyun Long, Guanglin Yuan, Weinan Shi, Yajun Zhang

Abstract

This paper firstly presents the experimental results of two simply supported full-scale reinforced-concrete (RC) slabs (unheated and fire-damaged). Thereafter, an analytical model for predicting the load–deflection curves of post-fire RC slabs is described in detail. The model can predict ultimate loads and displacements in both post-fire RC slabs and those at ambient temperature. The developed model has been validated using test data generated in this research and previous research and compared with a few analytical models developed by other researchers; some of the proposed model's advantages are highlighted in this paper. Results indicate that the model can be employed to determine the residual strength of post-fire RC slabs with reasonable accuracy. It is evident that steel strain differences and vertical shear forces in the slab have considerable effects on the load-carrying capacities of unheated and fire-damaged RC slabs.

https://ift.tt/2I6i7jq