【摘要】 饱和粘土在不排水循环荷载作用下强度会发生衰减,建立在粘土地基上的建筑物和填土道路在地震过程中有时会遭受破坏。传统有效应力摩尔-库仑强度理论不能正确确定循环荷载作用下粘土的不排水强度。在超固结粘土不排水强度计算的基础上,引入循环荷载作用损伤因子,提出循环荷载作用下饱和粘土不排水强度计算方法以及参数的确定方法。通过试验验证,所提出的方法是合理的。该方法为循环荷载作用下粘土地基的不排水强度和稳定性预测提供有效的途径。更多还原

【Abstract】 The un drained strength of saturated clay will decrease under cyclic loading. Sometimes serious damages to structures sited on clay layers and filled road pavements were occurred in earthquakes. It is unable to calculate the undrained strength of saturated clay correctly under cyclic loading by the Mohr-Coulomb criterion for effective stress. Based on the over-consolidated un drained strength, a cyclic–loading-induced degradation parameter is introduced and the calculation methods for determining un drained strength of saturated clay and the parameters have been proposed. According to the un drained tri axial tests under cyclic loading, the proposed method is verified available. The method will be an effective tool to predict the un drained strength and stability of clay layers. cuder cyclic loading.更多还原