摘要： This paper presents a pre-shaking technique for measuring the V s profile of sand deposits and determining the natural frequencies of the sand bed and soil-structure system in a centrifuge model at an acceleration of 80 g. The pre-shaking technique is a non-destructive test. It uses a shaker as a wave generation source and a vertical array of accelerometers embedded in the sand bed and the accelerometers attached to the pile head as receivers. The pre-shaking method can be easily used for in-flight subsurface exploration ( V s profile measurements) and in-flight system identification of soil-structure systems (natural frequency measurements). A soil–pile centrifuge model is used to demonstrate the versatility of pre-shaking during a routine centrifuge shaking table test. This paper discusses the testing setup, testing procedures, related SI techniques, and signal processing for the soil–pile system. The natural frequencies measured by the pre-shaking tests are consistent with theory-based results. This technique can be conducted at any time before and after major earthquake events occur in a test. 其他題名： Bull Earthquake Eng 出版者： Dordrecht: Springer Netherlands 出版日期： 2014-04-01 出處： Bulletin of earthquake engineering, 2014-04, Vol.12 (2), p.717-734 資源來源： Agricultural & Environmental Science Collection 版權： Springer Science+Business Media Dordrecht 2013 版權： 2015 INIST-CNRS 版權： Springer Science+Business Media Dordrecht 2014 識別號： ISSN: 1570-761X 識別號： EISSN: 1573-1456 識別號： DOI: 10.1007/s10518-013-9545-1
