循环荷载下饱和粘土不排水强度计算方法

英文篇名：A calculation method for un drained strength of saturated clay under cyclic loads
中文刊名：岩土力学
英文刊名：Rock and Soil Mechanics
作者：高广运 ; 顾中华 ; 杨宏明
英文作者：GAO Guang-yun ; GU Zhong-hua ; Yang Hong-ming (1.Depattment of Geotechnical Engineering ; Tongji University ; Shanghai 200092 ; China ; 2.Ningibo Xincheng Architectural Design Co.Ltd. ; Ningbo 315800 ; China)
中文关键词：循环荷载 ; 不排水强度 ; 超固结 ; 损伤因子
英文关键词：cyclic load ; un drained strength ; over consolidated ; degradation parameter
出版日期：2004-12-30
机构：同济大学地下建筑与工程系,同济大学地下建筑与工程系,宁波新城建筑设计有限公司上海,200092 ,上海,200092 ,宁波,315800
年：2004
期：S2
出版单位：岩土力学

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。
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.

引文

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