Performance of Flat Slab Structure with Different Ground Storey Height

Abstract

Flat slab systems in current construction practice are commonly used for relatively light residential
loads and for spans from 4.5m to 6m. Earthquakes have the potential for causing the greatest damages amongst all
natural hazards. Since earthquake forces are random in nature & unpredictable, the engineering tools needs to be
sharpened for analysing structures under the action of these forces. When subjected to earthquake action, the
unbalanced moments can produce high shear stresses in the slab. Hence it is necessary to study the performance of flat
slab when subjected to earthquake. The pushover analysis is becoming popular method of predicting seismic force and
deformation demands for the purpose of performance evaluation of existing and new structure. Now a day, according to
demand of structure variation in height of ground storey is seen. In this study, 3 flat slab models with different ground
storey height are analysed using design software ETABs (version 9.7.4) by pushover analysis. Results are shown in form
of pushover curves, base shear, storey drifts, plastic hinges mechanism of flat slab building. Effect of increase and
decrease in ground storey height is studied.