Abstract
Dept. of Architectural Engineering, Hanyang University, Seoul 133-791, KoreaABSTRACT This study evaluates the seismic performance of reinforced concrete (RC) flat plate structures relation to the gravity shearratio. For this purpose, 3 and 7 story framed buildings were designed for gravity loads only. Subsequently, a nonlinear static pushover anal-ysis and a nonlinear time history analysis for the prototype buildings were carried out. In the nonlinear analysis, newly propose analyticalslab-column joint model was utilized to capture punching shear failure and fracture mechanism in the analysis. The analytical resultsshowed that seismic performance of RC flat plate frame is strongly influenced by the gravity shear ratio. In particularly, in the RC flatplate frame with a large gravity shear ratio the lateral strength and maximum drift capacity decreased significantly.Keywords : reinforced concrete flat plate, gravity shear ratio, static pushover analysis, lateral strength, maximum drift capacity
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