Quantification of Slab Influences on the Dynamic Performance of RC Frames against Progressive Collapse
Publication: Journal of Performance of Constructed Facilities
Volume 29, Issue 1
Abstract
Numerous studies have indicated that the practice of ignoring the contribution of reinforced concrete (RC) slab in resisting progressive collapse is overconservative; however, the extent of influence of a slab, especially in terms of dynamic responses, have been rarely studied. To quantify this effect, two series of RC beam–column substructures (named DS and DF in this paper), with and without slab respectively were subjected to a series of dynamic tests involving the sudden removal of a corner support. To further elucidate the dynamic response of RC frames against progressive collapse, the experimental data acquired in this study were compared with their respective static responses derived in a previous series of tests published in another paper. The dynamic effects were evaluated by the newly defined term dynamic load increase factor (DLIF), which was defined as the ratio of static ultimate strength (SUS) to dynamic ultimate strength (DUS). The SUS of the test specimens had been captured in their respective static tests; however, the DUS of each specimen could not be determined based on a single dynamic test. Thus, a single-degree-freedom (SDOF) model was validated and used to conduct incremental dynamic analyses for each specimen.
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Acknowledgments
This research was supported by a research grant provided by the Defense Science & Technology Agency (DSTA), Singapore. Any opinions, findings, and conclusions expressed in this paper are those of the authors and do not necessarily reflect the view of DSTA, Singapore.
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Published In
Journal of Performance of Constructed Facilities
Volume 29 • Issue 1 • February 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Nov 20, 2012
Accepted: Jun 12, 2013
Published online: Jun 15, 2013
Discussion open until: Nov 12, 2014
Published in print: Feb 1, 2015
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