Vector and Scalar IMs in Structural Response Estimation and Risk Assessment: Part I - Hazard Analysis

A realistic assessment of building economic losses and collapse induced by 7 earthquakes requires monitoring several response measures both story-specific and 8 global. The prediction of such response measures benefits from using multiple 9 ground motion intensity measures (IMs) that are, in general, correlated. To allow 10 the inclusion of multiple IMs in the risk assessment process it is necessary to have 11 a practical tool that computes the vector-valued hazard of all such IMs at the 12 building site. In this paper, Vector-valued Probabilistic Seismic Hazard Analysis 13 (VPSHA) is implemented here as a post processor to scalar PSHA results. A group 14 of candidate scalar and vector IMs based on spectral acceleration values, ratios of 15 spectral acceleration values, and spectral accelerations averaged over a period range 16 are defined and their hazard evaluated. These IMs are used as structural response 17 predictors of 3D models of reinforced concrete buildings described in a companion 18 paper (Kohrangi et al., 2015b).