Study of aseismic retrofit of a flexible steel frame

Aiming at seeking the weak positions of a flexible steel frame structure used for industrial purpose and enhancing its aseismic capacity by taking some measures,firstly,the weak positions of the steel frame structure are analyzed;and then the validity of the proposed measures is verified by using numerical simulation.The seismic response of the retrofitted structure is compared with that of the original one in simulation duration.The results obtained show that the supplementary lateral bracings can improv the aseismic performance of the initial structure significantly.