Abstract

Earthquake is one of the destructive events in the world. Prediction of earthquake is not feasible at all. In the horizon, earthquakes of different intensities and magnitudes occurred. So it is a threat to all especially the tall structures of the mega cities. Due to shaking of ground surface, the substructure as well as the superstructure is vibrated. During earthquake, there will be a drift on the high rise structures. Then it can be included that the more the height, the more the drift. The drift of the structure decreases with increase in the width of the structure. So our concern is to calculate the drift of tall structures due to the vibration of ground. Hand calculation and programming with C (version C++ 4.5) is used to calculate the drift.

Key words: Earthquake, drift, tall building, lateral deflection, laterals forces.