Time-history dynamic analysis requires proper selections of earthquake records based on the design earthquake and site-specific... Show moreTime-history dynamic analysis requires proper selections of earthquake records based on the design earthquake and site-specific characteristics. The selected earthquake records, most of the time, must be scaled to match the design response spectrum. The design response spectrum was a derivation of a seismic hazard model with consideration of site-specific effect. The hazard model was developed by combining the deterministic seismic hazard analysis (DSHA) and the probabilistic seismic hazard analysis (PSHA). Considering that the observed structure in this study is an embankment dam located at seismically active region, the deterministic hazard model was represented by the 84th percentile (median-plus-one standard deviation) spectra while the probabilistic hazard model provided a uniform hazard spectrum (UHS) with 1% probability of being exceeded in 100 years of structure’s lifetime. The combined hazard model shows the response at the bedrock, thus, the propagation to ground surface was also analyzed by assuming several scenarios of soil deposit. The study assumed four scenarios of site-specific classes A&B, C, D, and E, with three ground motion records were selected for each scenario were selected. Each ground motion was scaled to meet the design response spectrum of each scenario. Performance of the dam against each ground motion was analyzed to evaluate parameters such as stability by using factor of safety, and deformation at the crest to check the freeboard status after earthquake event. The results show that the model remains stable after experiencing seismic force on site class C or lower, while site class D yielded nearly fail condition (average FOS 1.06) and all motions in site class E have failed the dam. M.S. in Civil Engineering, May 2017 Show less
