Effect of Earth vibrations on Vibration of Structures

Abstract

Research in the field of earthquake phenomenon 1s currently gaining an increasing interest to obtain a full understanding of its aspects, and develop a structural design code for minimizing earthquakes risks. The risks of earthquake can have a wide spectrum of casualties including damage of structures such as dams, nuclear reactors, factories, etc., which result in a great negative social and economical impact on any nation encountering the unfortunate mishap of bemg hit by an earthquake.

This thesis presents an analysis of the dynamic behavior of structures under the effect of vibrations due to earthquakes. The objectives of the presented research are categorized as follows:

• predicting earthquake excitation "intensity and magnitude".

suggesting preventive precautions for structures, before facing unewected casualties of an earthquake

• developmg a technique for reducing the vibration impact of structures due to earthquakes by providing proper isolation of the structure.

• providing computer models of different structures to study the effect of different parameters in controlling structure vibration.