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Effect of Cyclic Soil Model on Seismic Site Response Analysis
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 Title & Authors
Effect of Cyclic Soil Model on Seismic Site Response Analysis
Lee, Jinsun; Noh, Gyeongdo;
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 Abstract
Nonlinear soil behavior before failure under dynamic loading is often implemented in a numerical analysis code by a mathematical fitting function model with Masing`s rule. However, the model may show different behavior with an experimental results obtained from laboratory test in damping ratio corresponding secant shear modulus for a certain shear strain rage. The difference may come from an unique soil characteristics which is unable to implement by using the existing mathematical fitting model. As of now, several fitting models have been suggested to overcome the difference between model and real soil behavior but consequence of the difference in dynamic analysis is not reviewed yet. In this paper, the effect of the difference on site response was examined through nonlinear response history analysis. The analysis was verified and calibrated with well defined dynamic geotechnical centrifuge test. Site response analyses were performed with three mathematical fitting function models and compared with the centrifuge test results in prototype scale. The errors on peak ground acceleration between analysis and experiment getting increased as increasing the intensity of the input motion. In practical point of view, the analysis results of accuracy with the fitting model is not significant in low to mid input motion intensity.
 Keywords
Site response analysis;Numerical analysis;Nonlinear behavior of soil;Damping ratio;Shear modulus;
 Language
Korean
 Cited by
1.
비선형 유효응력해석을 이용한 1995 Kobe 지진시 케이슨 안벽의 거동 평가,이진선;노경도;

한국지진공학회논문집, 2016. vol.20. 6, pp.401-412 crossref(new window)
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