Wave absorbing-boundary method in seismic centrifuge simulation of vertical free-field ground motion |
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| Affiliation: | 1. Key Laboratory of Deep Underground Science and Engineering (Ministry of Education), School of Architecture and Environment, Sichuan University, Chengdu, PR China;2. Research Centre, Shenzhen Municipal Engineering Design and Research Institute Co. Ltd, Shenzhen, PR China;3. School of Architecture and Civil Engineering, Chengdu University, Chengdu, PR China;4. School of Civil Engineering, Tianjin University, Tianjin, PR China;5. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, PR China;1. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, Jiangsu Province 210009, China;2. Department of Mechanical Engineering, Wuhan Institute of Technology, Wuhan, Hubei Province 430070, China;3. Key Lab of Design and Manufacture of Extreme Pressure Equipment, Jiangsu Province, China;1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;3. Department of Civil and Environmental, National University of Singapore, 117576, Singapore;1. Environmental and Analytical Chemistry Division, School of Advanced Sciences, Vellore Institute of Technology University, Vellore-632 014, India;2. Aquaculture Biotechnology Laboratory, School of Bioscience and Technology, Vellore Institute of Technology University, Vellore-632 014, India |
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| Abstract: | In this paper, an evaluation of the method of experimental seismic simulation of vertical free-field ground motion by wave-absorbing boundary and centrifuge modeling is presented. By means of a large soil container with Ductseal lining and an in-box shake-table system, a series of seismic tests on a sand stratum model of uniform density and a large width-to-depth ratio was conducted at multiple g-levels. With a focus on the vertical motion produced, the time-domain data was processed using the transfer function approach. By examining the measured resonant regimes for the vertical mode as a function of the g-level or length scale over the frequency spectrum, the capability of the Ductseal boundary approach in simulating vertical free-field motions in one-dimensional inhomogeneous site response theory is highlighted. In seeking a comprehensive basis of synthesis for the modeling methodology, the benefits of using the three-dimensional elastodynamic model in the interpretation of the vertical free-field measurements are demonstrated. |
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