Strengthening and Retrofitting of RC Flat Slabs to Mitigate Progressive Collapse by Externally Bonded CFRP Laminates
Publication: Journal of Composites for Construction
Volume 17, Issue 4
Abstract
Previous studies indicated that RC flat slabs, especially without drop panels, are of high vulnerability to progressive collapse because no beams could assist in redistributing the axial force previously carried by the lost columns. In order to reduce the likelihood of progressive collapse, necessary strengthening schemes should be applied. Six specimens of similar dimensions and reinforcement details were prepared, two of which were unstrengthened and served as control specimens, while the remaining four were strengthened with two different schemes: orthogonally (Scheme 1) or diagonally (Scheme 2) bonded carbon-fiber-reinforced polymer (CFRP) laminates on the top surface of the slab. The progressive collapse performance of the strengthened specimens was studied in terms of their load-displacement relationships, first peak strength, initial stiffness, and energy dissipation capacities. The dynamic ultimate strength and corresponding dynamic effects of flat slabs after the sudden removal of a corner column was also discussed due to the dynamic nature of progressive collapse. Test results indicated that both schemes were effective in improving the performance of RC flat slabs in resisting progressive collapse.
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Acknowledgments
This research was made possible through the support of and collaboration with FYFE Asia Private Limited in Singapore. The significant assistance from Jeslin Quek of FYFE Asia is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 17 • Issue 4 • August 2013
Pages: 554 - 565
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 4, 2012
Accepted: Dec 14, 2012
Published online: Dec 17, 2012
Discussion open until: May 17, 2013
Published in print: Aug 1, 2013
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