The undrained strength of saturated clay will decrease during undrained cyclic loading. Sometimes serious damages to structures sited on clay layers and filled road pavements are occurred in earthquakes. In this paper, based on the over-consolidated undrained strength, a cyclic loading-induced degradation parameter is introduced, and the calculation methods for cyclic shear strength of saturated clay and the parameters are proposed. Meamwhile, the effect of reconsolidation index to the post cyclic shear strength increment is analyzed. According to the undrained cyclic triaxial tests, the proposed method is verified available. The method will be effective to predict the cyclic shear strength and stability of clay layers.
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顾中华,高广运.循环荷载下饱和粘土强度等效计算探讨[J].地震工程学报,2005,27(1):13-16. GU Zhong-hua, GAO Guang-yun. Discussion on Equivalent Calculation for Shear Strength of Saturated Clay under Cyclic Loading[J]. China Earthquake Engineering Journal,2005,27(1):13-16.