Seismic Response of Dual Systems Consisted of Steel Moment-Resisting Frames with Shear Wall under Influencing Pulse Type Ground Motion

The seismic responses of dual systems consisted of steel moment-resisting frames with shear wall (which is used in steel structures as seismic lateral load resistant system) under influencing pulse type ground motion have been evaluated in this paper. This aim is obtained Based on conducting a number of non-linear dynamic time history analyses which were executed on designed structural models by the chosen big ground motions. The designed structural models are consisted four 10- and 20-story frames which are classified in groups of; special moment-resisting frame with sideshear wall and special moment-resisting frame with middle shear wall. The selected models were designed for seismic lateral load by the Iranian seismic code 2800 (3rd Edition). The non-linear analyses have been conducted according to three different groups of earthquake records which are classified based on the type of velocity pulse or pulses in theirtime history. According to the analytical results, it is important to consider the effects of the kinematic energy imposed by strong earthquakes on response parameters of shear wall lateral load resistant system of steel structures. Consequently, it should be noted that the velocity parameter of recorded ground motions can be considered as a design criterion for the structures that must be constructed in near fault areas.

Keywords:

Non-linear response , Dual system (SMRF plus to shear wall) , Near-field , Velocity pulse