Seismic Behavior Of Reinforced Concrete Buildings Under Varying Frequency Contents

Earthquake causes loss of life, damages the built and natural environment. In order to take precaution for the loss of life and damage of structures due to the ground motion, it is important to understand the characteristics of the ground motion. The important dynamic characteristics of earthquake are PGA, frequency content, and duration. These characteristics play predominant role in studying the behaviour of structures under seismic loads. Ground motion has different frequency contents such as low, intermediate and high. Present work deals with study of frequency content of ground motion on RC buildings. Linear time history analysis is performed in structural analysis and design (SAP2000) software. The proposed method is to study the response of low, mid, and high-rise reinforced concrete buildings under low, intermediate, and high frequency content ground motions. The responses of each ground motion for each type of building in terms of floor displacement, floor velocity, floor acceleration, and base shear are studied and compared. The results show that high frequency content ground motions have significant effect on RC buildings.