Dynamic Effective Stress Analysis of Staturated Sand Deposits by an Approximate Method
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概要
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Presented is a simplified procedure for performing the dynamic effective stress analysis. The proposed method is an extension of the method of equivalent linear dynamic response analysis which has been used in the total stress analysis. It is assumed, in this method, that the variations of the shear modulus and damping factor due to the magnitude of strain and reduction of the effective stress are independent each other. That is, at first, the total stress analysis is done in order to obtain the shear moduli and damping factors corresponding to the specified strains, called effective strains. Secondly, the effective stress analysis is carried out and the moduli are varied due to the variation of the effective stress only. In this way, by applying the simplified stress-strain relation to the effective stress analysis, it can reduce plenty of calculating time of effective stress analysis. All the material parameters needed for the material model used in this study can be determined from the most common experimental data obtained through undrained cyclic shear tests. The accuracy of the method is assessed by comparing it with nonlinear effective stress method which is a nearly exact numerical solution. For a one-dimensional lumped mass soil system, the result of this method presents a good agreement of the maximum peak shear stress response and the final residual pore water pressure with that of nonlinear analysis. It is concluded that, in lieu of complicated nonlinear effective stress analysis, the proposed method can apply to the practical object.
- 東海大学の論文
著者
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HYODO Masayuki
Department of Civil Engineering
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Hyodo Masayuki
Department Of Civil Engineering Faculty Of Engineering Fukuoka Campus
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- Undrained Cyclic Shear Behaviour of Overconsolidated Clay Subjected to Initial Static Shear Stress
- Dynamic Effective Stress Analysis of Staturated Sand Deposits by an Approximate Method
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