Structural Drift Corresponding to the Critical Excitations

Although the probability of the occurrence of a critical earthquake is low, the consequences of the critical excitation events are beyond the disaster. Therefore, there is a need to consider the critical excitation analysis for important structures such as power plants, infrastructure, and buildings. Indeed, one of the important criteria in the seismic design of the structures using the critical excitation is to control the maximum structural displacement. However, the required characteristics of the analysis and design of the structures are generally random variables and have many uncertainties. Therefore, the probability-based analysis should be accomplished to determine the most probable structural responses. The main objective of this research is to investigate the reliability level of steel frame buildings subjected to critical excitations. In due course, the wide range of the SDOF structures investigated subjected to real ground motions of the critical excitations. Eventually, the reliability index of structural displacement for extreme events limit state function concerning the critical excitations were computed.