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논문 기본 정보

자료유형
학술저널
저자정보
Cheng, Xinglei (State Key Laboratory of Hydraulic Engineering Simulation and Safety of Tianjin University, Tianjin University) Wang, Jianhua (State Key Laboratory of Hydraulic Engineering Simulation and Safety of Tianjin University, Tianjin University)
저널정보
테크노프레스 Geomechanics & engineering Geomechanics & engineering 제11권 제3호
발행연도
2016.1
수록면
325 - 343 (19page)

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A total stress-based bounding surface model is developed to predict the undrained behaviour of saturated soft clays under cyclic loads based on the anisotropic hardening modulus field and bounding-surface theories. A new hardening rule is developed based on a new interpolation function of the hardening modulus that has simple mathematic expression and fewer model parameters. The evolution of hardening modulus field is described in the deviatoric stress space. It is assumed that the stress reverse points are the mapping centre points and the mapping centre moves with the variation of loading and unloading paths to describe the cyclic stress-strain hysteresis curve. In addition, by introducing a model parameter that reflects the accumulation rate and level of shear strain to the interpolation function, the cyclic shakedown and failure behaviour of soil elements with different combinations of initial and cyclic stresses can be captured. The methods to determine the model parameters using cyclic triaxial compression tests are also studied. Finally, the cyclic triaxial extension and torsional shear tests are performed. By comparing the predictions with the test results, the model can be used to describe undrained cyclic stress-strain responses of elements with different stress states for the tested clays.

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