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Simplified reliability analysis of punching in reinforced concrete flat slab buildings under accidental actions

Olmati, P, Sagaseta, J, Cormie, D and Jones, A (2017) Simplified reliability analysis of punching in reinforced concrete flat slab buildings under accidental actions Engineering Structures, 130. pp. 83-98.

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Abstract

Flat slab concrete buildings are widely found in infrastructure such as office and residential buildings or industrial facilities. The susceptibility of progressive collapse of such structures due to accidental loads is highly dependent on the structural performance of the slab-column connections. This paper presents a framework for a simplified reliability analysis and derivation of safety factors for computing the probability of punching of flat slab concrete buildings subjected to accidental loads such as column removal, slab falling from above or blast load. The main advantage of the proposed approach is that it considers in a simple manner, the uncertainty in the gravity load applied in the slab before the accidental event, which affects the inertial effects and demand/capacity ratio in the slab-column connections. Eurocode 2 and the Critical Shear Crack Theory for punching are used and extended to dynamic cases for the assessment of the demand/capacity ratio using computer-based time history finite element simulations. The proposed reliability method is applied to a case study of an existing building showing that the column removal situation is not always critical whereas the slab falling from above is much more detrimental.

Item Type: Article
Subjects : Civil Engineering
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
AuthorsEmailORCID
Olmati, PUNSPECIFIEDUNSPECIFIED
Sagaseta, JUNSPECIFIEDUNSPECIFIED
Cormie, DUNSPECIFIEDUNSPECIFIED
Jones, AUNSPECIFIEDUNSPECIFIED
Date : 1 January 2017
Funders : EPSRC
Identification Number : https://doi.org/10.1016/j.engstruct.2016.09.061
Copyright Disclaimer : 0141-0296/Crown Copyright 2016 Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords : flat slabs, reliability analysis, progressive collapse, dynamic amplification factor, finite element analysis, column failure, floor impact, explosion load, Punching
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 03 Oct 2016 10:22
Last Modified : 18 Oct 2016 11:58
URI: http://epubs.surrey.ac.uk/id/eprint/812322

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