Determination of appropriate intensity measures for probabilistic seismic demand modeling of single-story precast RC industrial building

This study aims to determine appropriate intensity measures (IMs) used in linear probabilistic seismic demand models (PSDMs) for single-story precast RC industrial buildings. To this end, a methodology based on correlation, efficiency, practicality, proficiency, and sufficiency criteria is presented for selecting optimal IMs. The 29 IMs commonly used in seismic vulnerability and risk assessment are categorized as acceleration-related, velocity-related, displacement-related, and compound. The non-linear analyses were performed by applying the Incremental Dynamic Analysis (IDA) method to 50 earthquake ground motion records compatible with the target spectrum. Park and Ang Damage Index (DI(P&A)) and Maximum Drift Ratio (MDR) were used as damage parameters to measure the structure response. Numerous PSDMs were developed and a large number of regression analyses between damage parameters and IMs were performed. Following detailed analysis and evaluation, Housner Intensity (HI) and Velocity Spectrum Intensity (VSI) were identified as the optimum IM parameters. Finally, fragility curves were developed as a function of appropriate IMs that are considered to give reasonable results in addition to the optimum IMs.