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Effects of different test methods on the seismic dynamic response in inclined liquefiable soil
Abstract According to horizontal liquefiable free-field shaking table test carried out by the research group, a finite element numerical model of horizontal liquefiable free-field is established based on OpenSees finite element platform, and the influence of the model box on dynamic response of soil is considered in this numerical model, and the reliability of numerical model is verified by comparing with the shaking table test results. The inclined liquefiable free-field finite element calculation model is established based on the horizontal numerical model, and three different numerical models of inclined shear box model, inclined soil in shear box model and inclined soil in rigid box model are established to simulate the different test methods adopted in the shaking table test. Through comparison, the dynamic response results of free-field soil calculated by three numerical models under the action of 0.3g Wenchuan earthquake Wolong wave are analyzed, and the influences of three different test methods on the calculation results are discussed, and the results showed that the response of the lateral displacement of soil by two test methods of inclined shear box and inclined soil in shear box have great differences, and the maximum difference value can reach 45%; the response obtained by the two test methods of inclined soil in rigid box and in layer shear box have more obvious differences in pore water pressure lateral displacement and acceleration of soil.
Highlights The influence of the model box on soil response is considered in this numerical model. The inclined liquefiable free-field finite element calculation model is established. Three different numerical models are established to simulate the different test methods. The responses of soil displacement by two test methods in shear box have great differences. The soil responses in rigid box and in shear box have more obvious differences.
Effects of different test methods on the seismic dynamic response in inclined liquefiable soil
Abstract According to horizontal liquefiable free-field shaking table test carried out by the research group, a finite element numerical model of horizontal liquefiable free-field is established based on OpenSees finite element platform, and the influence of the model box on dynamic response of soil is considered in this numerical model, and the reliability of numerical model is verified by comparing with the shaking table test results. The inclined liquefiable free-field finite element calculation model is established based on the horizontal numerical model, and three different numerical models of inclined shear box model, inclined soil in shear box model and inclined soil in rigid box model are established to simulate the different test methods adopted in the shaking table test. Through comparison, the dynamic response results of free-field soil calculated by three numerical models under the action of 0.3g Wenchuan earthquake Wolong wave are analyzed, and the influences of three different test methods on the calculation results are discussed, and the results showed that the response of the lateral displacement of soil by two test methods of inclined shear box and inclined soil in shear box have great differences, and the maximum difference value can reach 45%; the response obtained by the two test methods of inclined soil in rigid box and in layer shear box have more obvious differences in pore water pressure lateral displacement and acceleration of soil.
Highlights The influence of the model box on soil response is considered in this numerical model. The inclined liquefiable free-field finite element calculation model is established. Three different numerical models are established to simulate the different test methods. The responses of soil displacement by two test methods in shear box have great differences. The soil responses in rigid box and in shear box have more obvious differences.
Effects of different test methods on the seismic dynamic response in inclined liquefiable soil
Zhang, Xiao-ling (author) / Zhao, Xian-hui (author) / Xu, Cheng-shun (author) / Jia, Ke-min (author) / Han, Yan (author)
2023-03-07
Article (Journal)
Electronic Resource
English
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