Abstract: The current study investigates the seismic response of reinforced concrete moment resisting-frame multi-story buildings with soft story or open story located at different levels and designed according to the Egyptian Code. Different building models as (1) bare frame, (2) frame with fully infill wall panels and (3) frame models with infill panels and soft storey at base level, 3rd level, 6th level, 9th level, and 12th level have been built. In order to simulate the stiffness and structural action of masonry infill walls, single equivalent strut method has been used. The seismic responses of the considered models are obtained using dynamic response spectrum analysis. The obtained response quantities are storey displacements, drifts, shear and overturning moments. In addition, the fundamental natural periods in both longitudinal and transverse directions of bare frame, frame with masonry infill, and a variety of building frame models with soft storeys have also been computed. The results obtained from the analysis for bare frame model tend to highly deviate from the results of other models confirming the usefulness and necessity of considering masonry infill wall action. Moreover, the absence of masonry infill action, i.e. existence of open or soft storey, causes significant and substantial changes in the obtained storey responses.
Keywords: masonry infill walls, single diagonal strut, soft storey, response spectrum analysis, moment resisting frame, ETABS program.
Title: Seismic Response Evaluation of Moment-Resisting-Frame Multi-Story Buildings with Soft Story
Author: Magdy Genidy, Nagy Hanna, Hesham Tahoon, Sayed Mahmoud
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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