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Title: Cyclic Loading Test of Reinforced Concrete Frame with Precast-Prestressed Flooring System

Author(s): Rajesh P. Dhakal, Brian H. H. Peng, Richard C. Fenwick, Athol J. Carr, and Des K. Bull

Publication: Structural Journal

Volume: 111

Issue: 4

Appears on pages(s): 777-788

Keywords: effective flange width; elongation; moment-resisting frame; plastic hinge; precast floor; slab contribution

DOI: 10.14359/51686732

Date: 7/1/2014

Abstract:
A one-story, two-bay reinforced concrete (RC) frame-floor subassembly typical of a (half-scale) midstory of a high-rise RC moment frame building in New Zealand is tested under quasi static reversed cyclic loading to investigate the effect of precast prestressed floor units and transverse beams on the seismic performance of RC moment-resisting frames. This paper reports in detail the design, fabrication, instrumentation, and structural behavior of the three-dimensional specimen tested. The results show that the damage to external plastic hinges (closer to the corner columns) is significantly more severe than the internal hinges (adjacent to the intermediate columns), and that the elongation measured in the external hinges was more than double of that in the internal plastic hinges. The results also indicate that the flexural strength of RC beams is likely to be significantly underestimated by current code provisions, which is undesirable, as it might result in nonductile failure modes in a major earthquake.