Twenty-Four Centrifuge Tests to Quantify Sensitivity of Lateral Spreading to Dr and PGA
| Autor: | S. Escoffier, Kai Liu, Mitsu Okamura, Wen Yi Hung, Tarek Abdoun, Gopal Madabhushi, Mourad Zeghal, Evangelia Korre, Stuart K. Haigh, Nicholas Stone, Yan Guo Zhou, Andreas G. Gavras, Ting-Wei Liao, Ruben R. Vargas, Dong-Soo Kim, Trevor J. Carey, Asri Nurani Sjafuddin, Tetsuo Tobita, Kyohei Ueda, Hikaru Yatsugi, Srikanth S. C. Madabhushi, Seong Nam Kim, Majid T. Manzari, Bruce L. Kutter, Bao Li Zheng, Jeong Gon Ha |
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| Rok vydání: | 2018 |
| Předmět: |
Centrifuge
0211 other engineering and technologies Liquefaction Soil science 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences Displacement (vector) Model test Environmental science Relative density Sensitivity (control systems) Objective evaluation Intensity (heat transfer) 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Geotechnical Earthquake Engineering and Soil Dynamics V. |
| DOI: | 10.1061/9780784481486.040 |
| Popis: | Twenty-four centrifuge model tests have been conducted at nine different geotechnical centrifuge facilities around the world as part of the international LEAP effort (liquefaction experiments and analysis projects). All of the centrifuge models represent a 4 m deep 5 degree sloping submerged sand deposit. The mean effective PGA of the input motion for all of the experiments was approximately 0.15 g and the mean relative density was approximately 65%, but the effective PGA's varied between about 0.07 g and 0.3 g, and the relative densities varied between about 40% and 75%. The test matrix was designed to enable experimental quantification of not only the median response but also the trend and sensitivity of the model response to density and shaking intensity. Quantification of the sensitivity of the response to initial conditions is a prerequisite for objective evaluation of the quality of the model test data. In other words, a discrepancy between two experiments should be evaluated after accounting for the uncertainty in the initial conditions and the sensitivity of the response to initial conditions. For the first time, a sufficient number of experiments has been performed on a similar problem to provide meaningful quantitative evaluation of the trend between PGA, density, and displacement. The sensitivity is quantified by the gradient of the trend and the uncertainty of the trend is quantified from the residuals between the fitting data and the trend. |
| Databáze: | OpenAIRE |
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