Seismic Response of Dual Systems in Tall Buildings Under Influencing Pulse Type Earthquake Records

In this paper characteristics of the seismic response of dual systems used in tall buildings as earthquake resistant systems are presented. The results are discussed based on conducting a number of non-lineardynamic time history analyses which were executed according to some chosen strong earthquake records.The tall building structural models are consisted four 30-story frames; steel Special Moment-Resisting Frame with Shear Wall and steel Special Moment-Resisting Frame with Concentric Braced Frame. The structural models have been designed for lateral seismic load according to the Iranian seismic code 2800 (3rd Edition). To evaluate the aseismic response properties of all structural models, 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 would be appeared in their time history. It is totally concluded that both general parameters i.e. the structural systems and the distinct characteristics of strong earthquakes, especially coherent velocity pulses can obviously affect the seismic responses of tall buildings. Hence it is important to taking into account the effects of the kinematic energy imposed by the near field strong earthquakes on response parameters of tall buildings

Keywords:

Seismic response , Dual system , Tall building , Near-field , Velocity pulse