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Lead Author: Jin Ho Lee Co-author(s): Hieu Van Nguyen, nvh10chelsea@gmail.com, Jung Han Kim, jhankim@pusan.ac.kr
Probabilistic Site Response Analysis Considering Variability of Soil Properties
Because seismic waves are influenced by variability at local soil sites, their effects on site responses are studied by means of a probabilistic site response analysis based on the random vibration theory. Monte Carlo simulations are employed to take into consideration the effects of variability of the layer thickness, low-strain shear-wave velocity, and nonlinear dependence of the shear modulus and hysteretic damping on shear strain at soil sites. The probabilistic approach is applied to generic soil sites to evaluate their soil-amplification functions. Seismic hazard curves and uniform hazard response spectra (UHRS) can be obtained using the amplification functions and the hazard curves of outcropping bedrock motions. Then, the seismic risk for structures at the sites is calculated to produce ground motion response spectra (GMRS) for a seismic design. It can be observed from the simulations that the variability in the layer thickness and the low-strain shear-wave velocity influences the soil-amplification functions and the resulting UHRS and GMRS values for the soil sites significantly.
Paper JH103 Preview
Author and Presentation Info
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Lead Author Name: Jin Ho Lee (jholee0218@pknu.ac.kr)
Bio:
Country: South Korea Company: Pukyong National University Job Title: Associate Professor