Prediction of Collapse from PGV and PGD

We propose a collapse prediction model described in peak ground velocity (PGV) and peak ground displacement (PGD) for steel and reinforced concrete moment-resisting frame buildings. Olsen (2008) simulated the seismic response of eight steel frame buildings to over 60,000 simulated seismic motions; the simulations showed that collapse can be predicted from PGV and PGD. Song and Heaton (2012, also in this proceeding) showed that collapse of the same buildings can also be predicted from the peak amplitude of low-pass Butterworth filtered accelerations (PFA) and knowledge of the pushover curve. This study maps the collapse threshold of PFA’s into the PGD and PGV space. As expected, the PFA-derived curve for PGD and PGV does an excellent job of fitting the collapse data of Olsen.