1 Abstract

. The major problem of structural engineering is estimating the behavior of a structure subject to ground motion. Many factors affect EQ loads, including, among other things: the nature of the soil, building heights, relative differences between building heights, spaces between adjacent buildings, the structural system resisting lateral loads, the location of collision points, and the peak ground acceleration of the earthquake at the building site.
Therefore, understanding the spectrum response is the basic input for introducing earthquake loads on structural structures. Therefore, this research focused on spectral response, the history of its origin, and its philosophy. It was presented through some symbols and the factors, variables, and equations they stipulated, within the framework of the same goal, which is to formulate a deep idea about the spectrum response curve.
Therefore, understanding the spectrum response is the basic input for introducing earthquake loads on structural structures. Therefore, this research focused on spectral response, the history of its origin, and its philosophy. It was presented through some symbols and the factors, variables, and equations they stipulated, within the framework of the same goal, which is to formulate a deep idea about the spectrum response curve.