Resilience of Flat Slab Structures in Different Phases of Progressive Collapse
Date of Issue2016
School of Civil and Environmental Engineering
With a spate of high-profile structural collapses leading to severe casualties and economic loss in recent history, there has been a growing interest in understanding the behavior of building structures in resisting progressive collapse. While many experimental and analytical studies have been conducted, they have mainly been focused on beam-column or beam-column-slab frames. This study, on the other hand, focuses on the behavior of reinforced concrete (RC) flat slab structures, as they are also highly vulnerable to collapse. This is especially so given that: 1) flat slab structures may have insufficient stiffness to redistribute the loads initially resisted by the lost column; and 2) the residual load-resisting capacity of remaining structures may not be able to sustain existing service loads after removal of several columns. Two series of multi-panel RC flat slab substructures were tested with two different loading rigs to study the load redistribution behavior and residual resisting capacities of flat slab structures when two different phases of collapse are concerned. The main test results such as load displacement response, crack pattern, failure modes, and local strain gauge readings were presented and discussed. Based on test results, a series of further analyses were carried out to elucidate the effects of each design parameter.
ACI Structural Journal
© 2016 American Concrete Institute. This paper was published in ACI Structural Journal and is made available as an electronic reprint (preprint) with permission of American Concrete Institute. The published version is available at: [http://dx.doi.org/10.14359/51688619]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.