Effect of loss of bond on flat-slab building collapses

Author:

Kotsovos Gerasimos1ORCID,Vougioukas Emmanouil2ORCID,Kotsovos Michael D.3ORCID

Affiliation:

1. Consultant Engineer, Department of Civil Engineering, National Technical University of Athens, Athens, Greece

2. Assistant Professor, Department of Civil Engineering, National Technical University of Athens, Athens, Greece

3. Former Professor, Department of Civil Engineering, National Technical University of Athens, Athens, Greece (corresponding author: )

Abstract

Between 1997 and 2010, there was a small, yet unexpected, number of flat-slab car park buildings that collapsed under service loading. In all the cases, the collapse was preceded by loss of bond (LoB) between the concrete and flexural reinforcement. All investigations of the causes of these collapses have since been inconclusive, particularly as regards the effect of LoB. Yet, LoB due to yielding of the flexural reinforcement in tension had already been proposed as the main cause of punching, and failure criteria derived on the basis of this proposal were found to produce predictions that correlated closely with experimentally established values of the punching failure load. The aim of the present work was to extend the range of application of these criteria to the case of LoB due to steel corrosion and test their validity against the available information on the car park building collapses.

Publisher

Thomas Telford Ltd.

Subject

Building and Construction,Civil and Structural Engineering

Reference16 articles.

1. ACI (American Concrete Institute) (2006) ACI 318-06: Building code requirements for structural concrete and commentary (ACI 318R-06). ACI, Farmington Hills, MI, USA.

2. Anon (1997) Shock collapse sparks lift slab fears and safety experts urge car park review. New Civil Engineer, 27 March–3 April: pp. 3–4.

3. Anon (2021) The balcony of a multi-storey residential building in Halandri collapsed. Athens News, 15 October. See https://en.rua.gr/2021/10/15/the-balcony-of-a-multi-storey-residential-building-in-halandri-collapsed/ (accessed 20/10/2021).

4. Effects of Simulated Corrosion and Delamination on Response of Two-Way Slabs

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