The Open Construction & Building Technology Journal




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Rotations of RC Members of Infilled Frames at Yielding and Ultimate


The Open Construction and Building Technology Journal, 2012, 6: 50-62

D. J. Kakaletsis

Reinforced Concrete Laboratory, Technological Educational Institution of Serres, 62124 Serres, Greece.

Electronic publication date 31/10/2012
[DOI: 10.2174/1874836801206010050]




Abstract:

The influence of masonry infills with openings on the rotations of RC members of infilled frames at yielding and ultimate under seismic loading is investigated. Fifteen 1/3-scale, single-story, single-bay frame specimens were tested under reversed cyclic, quasi-static, horizontal loading up to a drift level of 40‰. The parameters investigated include the shape, the size, the location of the opening and the infill compressive strength. Relative hinge rotation at the ends of the beams and columns were calculated by a pair of displacement transducers placed on the surface of the frame members. Based on the load against rotation envelope curves of each cross-section, the deformation at yielding, θy, and the ultimate deformation capacity, θu, corresponding to a lateral force response equal to 85% of the maximum, were measured and compared with the values given by FEMA reports. Consequently, a reduction factor is proposed for FEMA values.


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