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http://dx.doi.org/10.4334/IJCSM.2011.5.1.019

Dynamic Response of Reinforced Concrete Beams Following Instantaneous Removal of a Bearing Column  

Tian, Ying (Dept. of Civil Engineering, University of Nevada Las Vegas)
Su, Youpo (Hebei Earthquake Engineering Research Center, Hebei United University)
Publication Information
International Journal of Concrete Structures and Materials / v.5, no.1, 2011 , pp. 19-28 More about this Journal
Abstract
This paper documents an experimental study of dynamic response of reinforced concrete beams following instantaneous removal of a bearing column. Four half-scale specimens representing two-span beam bridging across the removed column were tested. The test boundary conditions simulated rotational and longitudinal restraints imposed on a frame beam by the neighboring structural components. The gravity loads were simulated by attaching mass blocks on the beams at three locations. Dynamic loading effects due to sudden removal of a column were simulated by quickly releasing the supporting force at the middle of the specimens. The experimental study investigated the load-carrying capacity of beams restrained longitudinally at the boundaries and dynamic impact on forces. The tests confirmed the extra flexural strength provided by compressive arch action under dynamic loading. The tests also indicated that the dynamic amplification effects on forces were much lower than that assumed in the current design guideline for progressive collapse.
Keywords
compressive arch action; dynamic impact factor; dynamic response; progressive collapse; reinforced concrete beam;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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