Seismic Performance Assessment of High—rise Buildings Subjected to Near—Fault Ground Motion with Fling Effects

Abstract:

Near fault ground motion with characteristics of fling step and forward directivity is significantly different from far fault ground motion, during which fling step with permanent static displacement offset resulting in one sided velocity pulses could be very effective in causing damage to longer period structures. The record with fling step was selected from the 1999 Turkey earthquake at station SKR. Based on the elastic and elastoplastic response spectrum, a single degree of freedom system with different linear fundamental periods and yield strengths was used to investigate the fling effects. At the same time, a typical reiforced concrete shear wall high rise building was adopted to assess the seismic performance subjected to near fault groud motion with fling effects. Results show that near fault ground motion with fling step significantly affects the performance of high risen structure with longer period, at the same time, for the shorter period structure, fling effects can not be ignored once structure goes to remarkable nonlinear state.