Limit load-carrying capacity of two-way concrete slabs with clamped edges in fire

Dong Yuli; Zhang Dashan; Fang Yuanyuan

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Limit load-carrying capacity of two-way concrete slabs with clamped edges in fire

Dong Yuli 1 *,Zhang Dashan 2 #,Fang Yuanyuan 2

1.College of civil engineering, Huaqiao University, Xiamen 361021

2.College of civil engineering, Huaqiao University, Xiamen, 361021

*Correspondence author

#Submitted by

Subject:

Funding: Research Fund for the Doctoral Program of Higher Education of China （No.Grant No. 20102302110043）, National Natural Science Foundation of China （No.Grant No. 51178143）

Opened online:23 August 2013

Accepted by: none

Citation: Dong Yuli,Zhang Dashan,Fang Yuanyuan.Limit load-carrying capacity of two-way concrete slabs with clamped edges in fire[OL]. [23 August 2013] http://en.paper.edu.cn/en_releasepaper/content/4555736

The experimental description of full-scale two-way concrete slabs with clamped edges under furnace environment is presented in this paper. The details of clamped support conditions, arrangements of reinforcement, positions of displacement transducers and thermocouple trees are described. The experimental results including temperature distribution, central vertical deflection and the edge horizontal deflection of the concrete slabs are given. A segment equilibrium method to calculate the limit load-carrying capacity of concrete slabs in fire conditions is presented. The model considers the tensile membrane action contributing to the vertical component of reinforcement tensile forces after the formation of mechanism of plastic hinge line. Comparison between the developed model and test results shows good correlation.

Keywords:Design of civil engineering; two-way concrete slabs; tensile membrane action; fire; yield line theory; segment equilibrium

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