Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cyclic Strength of Ottawa F-65 Sand: Laboratory Testing and Constitutive Model Calibration
Simulating potential earthquake-induced deformations of slopes requires a detailed understanding of the cyclic strength of the soil, its variation with loading duration, and the cyclic mobility behavior of the soil under a static shear stress. Recent centrifuge tests performed in the framework of the Liquefaction Evaluation and Analysis Project (LEAP) have examined this problem by modeling a submerged slope of uniform Ottawa F-65 sand with an average thickness of 4 m in prototype scale. In such problems, the ability of a constitutive model to capture the response of the sand under the operating conditions is key to our ability to predict the overall response of the slope. Experimental studies on the cyclic behavior of Ottawa F-65 sand in undrained cyclic triaxial compression (TXC) and cyclic direct simple shear tests (DSS), are compiled. Additional undrained DSS tests on Ottawa F-65 were independently performed by the authors under conditions similar to the specified ones. Findings from three experimental studies are reviewed and compared to the newly performed DSS tests, conclusions are drawn with regards to their consistency, and sources of discrepancies are discussed. This study primarily focuses on discrepancies in the estimated cyclic strength and how that strength varies with loading duration, both of which are critical to evaluating the response of a sloping sand deposit. The testing results are followed by independent sets of single-element numerical calibrations of the constitutive model PM4Sand. Conclusions are drawn with regards to the performance of the constitutive model and the range of calibrated constitutive model parameters obtained.
Cyclic Strength of Ottawa F-65 Sand: Laboratory Testing and Constitutive Model Calibration
Simulating potential earthquake-induced deformations of slopes requires a detailed understanding of the cyclic strength of the soil, its variation with loading duration, and the cyclic mobility behavior of the soil under a static shear stress. Recent centrifuge tests performed in the framework of the Liquefaction Evaluation and Analysis Project (LEAP) have examined this problem by modeling a submerged slope of uniform Ottawa F-65 sand with an average thickness of 4 m in prototype scale. In such problems, the ability of a constitutive model to capture the response of the sand under the operating conditions is key to our ability to predict the overall response of the slope. Experimental studies on the cyclic behavior of Ottawa F-65 sand in undrained cyclic triaxial compression (TXC) and cyclic direct simple shear tests (DSS), are compiled. Additional undrained DSS tests on Ottawa F-65 were independently performed by the authors under conditions similar to the specified ones. Findings from three experimental studies are reviewed and compared to the newly performed DSS tests, conclusions are drawn with regards to their consistency, and sources of discrepancies are discussed. This study primarily focuses on discrepancies in the estimated cyclic strength and how that strength varies with loading duration, both of which are critical to evaluating the response of a sloping sand deposit. The testing results are followed by independent sets of single-element numerical calibrations of the constitutive model PM4Sand. Conclusions are drawn with regards to the performance of the constitutive model and the range of calibrated constitutive model parameters obtained.
Cyclic Strength of Ottawa F-65 Sand: Laboratory Testing and Constitutive Model Calibration
Ziotopoulou, Katerina (Autor:in) / Montgomery, Jack (Autor:in) / Bastidas, Ana Maria Parra (Autor:in) / Morales, Brian (Autor:in)
Geotechnical Earthquake Engineering and Soil Dynamics V ; 2018 ; Austin, Texas
07.06.2018
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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