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Conditional Spectrum-Based Ground Motion Selection. Part Ii: Intensity-Based Assessments And Evaluation Of Alternative Target Spectra, Ting Lin, Curt B. Haselton, Jack W. Baker
Conditional Spectrum-Based Ground Motion Selection. Part Ii: Intensity-Based Assessments And Evaluation Of Alternative Target Spectra, Ting Lin, Curt B. Haselton, Jack W. Baker
Civil and Environmental Engineering Faculty Research and Publications
In a companion paper, an overview and problem definition was presented for ground motion selection on the basis of the conditional spectrum (CS), to perform risk-based assessments (which estimate the annual rate of exceeding a specified structural response amplitude) for a 20-story reinforced concrete frame structure. Here, the methodology is repeated for intensity-based assessments (which estimate structural response for ground motions with a specified intensity level) to determine the effect of conditioning period. Additionally, intensity-based and risk-based assessments are evaluated for two other possible target spectra, specifically the uniform hazard spectrum (UHS) and the conditional mean spectrum (CMS, without variability).It …
Conditional Spectrum-Based Ground Motion Selection. Part I: Hazard Consistency For Risk-Based Assessments, Ting Lin, Curt B. Haselton, Jack W. Baker
Conditional Spectrum-Based Ground Motion Selection. Part I: Hazard Consistency For Risk-Based Assessments, Ting Lin, Curt B. Haselton, Jack W. Baker
Civil and Environmental Engineering Faculty Research and Publications
The conditional spectrum (CS, with mean and variability) is a target response spectrum that links nonlinear dynamic analysis back to probabilistic seismic hazard analysis for ground motion selection. The CS is computed on the basis of a specified conditioning period, whereas structures under consideration may be sensitive to response spectral amplitudes at multiple periods of excitation. Questions remain regarding the appropriate choice of conditioning period when utilizing the CS as the target spectrum. This paper focuses on risk-based assessments, which estimate the annual rate of exceeding a specified structural response amplitude. Seismic hazard analysis, ground motion selection, and nonlinear dynamic …