Determination of Inelastic Seismic response of multistory irregular frames with different beam – column connections using ANN

The dynamic behavior of multistorey steel frames under earthquake excitations has been the subject of intense research for decades. In most of the analytical studies, connections were assumed to be rigid. Most connections, including fully restrained or moment connections, exhibit some degree of flexibility which, if ignored, may cause noticeable errors in frame response. The literature review showed the negligence of the aspect of connection flexibility and irregularity in determining the seismic response. In the present study building models with different beam-column connections have been modeled and analyzed using E-Tabs software. The analysis results have been tabulated to create a seismic response databank. Regression analysis has been done on the seismic response databank to propose new equations to estimate the fundamental time period. The proposed equations have been validated for building models with input data different from those adopted in the analytical study to demonstrate the efficiency of the proposed approach.