A new mitigation scheme to resist progressive collapse of RC structures

Alogla, KD; Weekes, L; Augusthus Nelson, L

Abstract

Reinforced concrete structures may be vulnerable to progressive collapse due to lack of sufficient continuous reinforcement. In most guidelines, general structural integrity requirements to reduce progressive collapse have been introduced, but the design of structures against progressive collapse has not been a major consideration. A mitigation scheme is proposed to increase resistance against progressive collapse. This involves the provision of additional reinforcement bars in the mid-layer of reinforced concrete beams. In the research reported here, four specimens were designed and tested subject to quasi-static loading conditions for a column removal scenario. One test specimen was made with conventional steel reinforcement and three specimens were made with additional steel reinforcement at the mid depth of the beam. The quasi-static behaviour of the test specimens were converted to a dynamic representation using an energy balance approach to obtain the progressive collapse load. Test results show that the proposed scheme significantly improves the ductility and collapse load of concrete beams subject to a column removal scenario.

• Journal Article Type: Article
• Acceptance Date: Aug 22, 2016
• Online Publication Date: Aug 26, 2016
• Publication Date: Oct 30, 2016
• Deposit Date: Aug 31, 2016
• Publicly Available Date: Aug 26, 2017
• Journal: Construction and Building Materials
• Print ISSN: 0950-0618
• Publisher: Elsevier
• Volume: 125
• Pages: 533-545
• DOI: https://doi.org/10.1016/j.conbuildmat.2016.08.084
• Publisher URL: http://dx.doi.org/10.1016/j.conbuildmat.2016.08.084
• Related Public URLs: http://www.journals.elsevier.com/construction-and-building-materials/
• Additional Information: Funders : Iraqi cultural attaché in London-UK