Limitations on point-source stochastic simulations in terms of ground-motion models

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2009

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Yenier, Emrah

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In this study, the limitations of point-source stochastic simulations are investigated in terms of fundamental geophysical parameters. Within this context, a total of 6000 synthetic ground motions are generated for various magnitude (5.0 ≤ Mw ≤ 7.5), source-to-site distance (less than 100 km), faulting style (shallow dipping and strike-slip) and site class (soft, stiff and rock) bins. The simulations are performed in two main stages: (1) the acceleration time series at outcropping very hard rock sites are simulated based on the stochastic method proposed by Boore (1983, 2003) and (2) they are modified through 1-D equivalent linear site response analysis to generate the free-field motions at soft, stiff and rock sites. Thus, as a part of this study, a probability-based soil profile model that considers the random variation of S-wave slowness as a function of depth is derived. The synthetic ground motions are assessed with several recent empirical ground-motion models to constitute the limitations of the simulation procedure. It is believed that the outcomes of this study will realistically describe the limitations of stochastic point-source simulation approach that can be employed further for the studies on improvements of this simulation technique.

Subject Keywords

Civil engineering.

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http://etd.lib.metu.edu.tr/upload/3/12610308/index.pdf
https://hdl.handle.net/11511/18359

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Yenier, “Limitations on point-source stochastic simulations in terms of ground-motion models,” M.S. - Master of Science, Middle East Technical University, 2009.