Abstract
Quasi-static “push-down” experiments were performed to evaluate the progressive collapse resistance of steel buildings considering multi-hazard extreme loading. A 1:3 scale three-story, two-bay conventional special moment resisting frame (SMRF) and a post-tensioned energy-dissipating frame (PTED) of similar geometry, designed and previously tested for seismic performance on a shaking table, were adapted for quasi static collapse testing. The experiments simulated the structural response of a prototype building after the sudden failure of a base column. An objective of the tests was to evaluate the effectiveness of earthquake resistant design details in enhancing the resistance to progressive collapse. An effort was made to document the sequence of damage in the frames and to correlate observed damage events with changes in the global resisting strength. Significant vertical displacement capacity and the ability of the steel components to redistribute loads after the failure of a single column were demonstrated by both tests. The resistance of the SMRF specimen against progressive collapse depends on the ultimate deformation capacity of the beam-to-column connections including panel zones, while the vertical load carrying capacity of the PTED frame depends primarily on the performance and ultimate strength of the tendons. Numerical simulations, using simplified models of the frames, investigate the capability of structural analysis software to reproduce the experimentally measured response.
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Acknowledgments
This research was supported in part by the National Science Foundation under award ECC-9701471 to the Multidisciplinary Center for Earthquake Engineering Research (MCEER). The first author was financially supported by a Fellowship from the “Alexander S. Onassis” Public Benefit Foundation. The opinions and conclusions expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsors. The authors express their gratitude to the SEESL technicians and to DYWIDAG-Systems International for providing the post-tensioning systems used in the PTED frame and the experimental setup.
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Tsitos, A., Mosqueda, G. (2012). Experimental Investigation of the Progressive Collapse of a Steel Special Moment-Resisting Frame and a Post-tensioned Energy-Dissipating Frame. In: Fardis, M., Rakicevic, Z. (eds) Role of Seismic Testing Facilities in Performance-Based Earthquake Engineering. Geotechnical, Geological, and Earthquake Engineering, vol 22. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1977-4_19
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DOI: https://doi.org/10.1007/978-94-007-1977-4_19
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