Prediction of Inelastic Displacement Demands

摘要

The objective of this study is to directly predict inelastic displacement spectra. An analysis of more than 3100 inelastic spectra of ground motions recorded in 64 worldwide shallow crustal earthquakes is carried out. A ground motion prediction equation for inelastic response spectra is developed and used for seismic hazard analyses to predict inelastic displacement demands. This study reveals that over a wide period range, if the structure needs to sustain large level of ductility in a large magnitude event, it is generally unconservative to use equal displacement rule to estimate inelastic displacement demand from elastic displacement spectra. This is especially the case for ductility levels greater than 2 and magnitudes greater than 6.5. The results of the deterministic and probabilistic seismic hazard analyses of inelastic displacement demands are presented in this paper.