摘要
通过对杭州市正常团结饱和软粘土进行应力控制的循环三轴试验，从应变的角度出发研究了循环荷载作用下土体的软化情况。通过研究不同循环应力比、不同超固结比、不同频率下轴向周期应变的软化情况分析了土体的软化，同时建立了一个合理反映土体应变软化的数学模型并确定了参数。
The pore pressure is occurred in the soft clay under cyclic loading, then lead to the degradation of soil strength and the collapse of structure. The soften of a normally consolidated soil under cyclic loading is studied by cyclic triaxial tests with stress-controlled. There are many factors on soil soften. These factors are the cyclic stress ratio, the overconsideration ratio (OCR), and the frequency of cyclic loading. According to test results the degradation index is redefined. A proper math- ematics model reflecting strain soften is Proposed. The Proposed model is verified by the comparison of the result of test with that of the calculation.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第5期75-78,82,共5页
China Civil Engineering Journal
关键词
循环荷载
饱和软粘土
应变软化
数学模型
cyclic loading, saturated soft soil, strain soften, mathematics model
