Fifth International Conference On Advances in Civil, Structural and Mechanical Engineering -ACSM 2016
Author(s) : MOHAMED ABDEL-MOOTY, MOHAMED RAAFAT, NASSER ZAKI AHMED
Insufficient separation distance between adjacent buildings may lead to their pounding resulting in damage or failure during strong earthquakes. Accordingly, most of the design codes specify a minimum separation or gap distance between adjacent buildings to prevent this pounding phenomenon. This research studies the seismic pounding between adjacent reinforced concrete buildings under various ground motions. It also investigates the factors affecting pounding and proposes a technique to mitigate it. Buildings are modeled as two-dimensional frames to idealize the adjacent buildings. The total of 10 different cases of adjacent frames with different height combinations. Nonlinear time history analysis is utilized using finite element computer program ETABS. Real earthquake records are scaled and used to simulate ground motion. Gap element is used to model pounding between buildings. The effect of variation of some design parameters on seismic pounding is investigated. Different parameters are studied including the separation distance, dynamic characteristic of the buildings and the number of the floor of the adjacent buildings. A technique for mitigation of pounding effect based on rigidly connecting selected floors in adjacent buildings is proposed and numerically tested. The results of the study are analyzed and the effect of the different factors are evaluated.