Mohsen Hajikazemian - MS Student, Dept of Civil Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran
Reza Saleh Jalali - Assistant Professor, Dept of Civil Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran

In this paper a simple model of three and seven-storey adjacent buildings excited by the horizontal component of fault-normal pulse with different magnitudes and time lags hasbeen considered. In the considered model each storey consist of a rigid beam connected to two axially rigid mass-less columns by linear rotational springs and dashpots. Fordetermination of the pounding force the non-linear viscoelastic model has been chosen.The system of coupled equations of motion has been solved by the fourth-order Runge-Kutta method. For the considered models the results indicate that the pounding effectstends to increase in the maximum drift of all stories of both buildings, but its effect become more significant for the seven-storey building, specially, in the stories upper thanthe contact levels. The time delay tends to increase to many times the maximum impact force and the minimum necessary gap size to prevent pounding.

wave-passage, pounding, near-fault earthquake, seismic response, adjacent buildings