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논문 기본 정보

자료유형
학술저널
저자정보
Teachavorasinskun, Supot (Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University) Pongvithayapanu, Pulpong (Department of Civil Engineering, Faculty of Engineering at Si Racha, Kasetsart University)
저널정보
테크노프레스 Geomechanics & engineering Geomechanics & engineering 제11권 제5호
발행연도
2016.1
수록면
713 - 723 (11page)

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Shear wave velocities of three selected sandy soils subject to drained triaxial compression test were continuously measured using the bender elements. The shear wave velocity during isotropic compression, as widely recognized, increased as confining pressure increased and they were correlated well. However, during drained shearing, the mean effective stress could no further provide a suitable correlation. The shear wave velocity during this stage was almost constant with respect to the mean effective stress. The vertical stress was found to be more favorable at this stage (since confining stress was kept constant). When sample was attained its peak stress, the shear wave velocity reduced and deviated from the previously existed trend line. This was probably caused by the non-uniformity induced by the formation of shear band. Subsequently, void ratios computed based on external measurements could not provide reasonable fitting to the initial stage of post-peak shear wave velocity. At very large strain levels after shear band formation, the digital images revealed that sample may internally re-arrange itself to be in a more uniform loose stage. This final stage void ratio estimated based on the proposed correlation derived during pre-peak state was close to the value of the maximum void ratio.

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