ABSTRACT
This paper presents the results of a study on the seismic behaviour of a well-instrumented 52-storey steel frame building in downtown Los Angeles, California. This building has been subjected to ground motions from several earthquakes. The records obtained during the 1991 Sierra Madre earthquake and the 1994 Northridge earthquake were selected to calibrate a detailed 3-D dynamic computer model of the building. Non-linear dynamic computer analyses were then employed to investigate the possible inelastic responses of the structure during more severe ground shaking than that experienced by the building so far. A number of distinctive ground motions from recorded earthquakes were applied to the computer model and the responses were evaluated and compared. The results of the comparison between maximum inelastic responses in terms of story displacement, story drift ratio, story shear and overturning moments are presented here.
