循环荷载作用下软土计算模型初探  

Discussion on Calculation Model for Soft Soil under Cyclic Loading

作　　者：郭中华[1] 余湘娟[1] 严蕴[1] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2002年第1期109-112,共4页Journal of Hohai University(Natural Sciences)

摘　　要：根据循环三轴试验 ,得到了上海某地区粘土永久应变有效应力加荷周数的关系 .对上海某地区三类软土的共振柱试验进行了分析研究 ,结果表明 ,三种土类的动剪切模量剪应变、阻尼比剪应变关系具有一定规律性 .文章最后给出了上海某地区三类软土的动剪切模量比剪应变、阻尼比—剪应变的数学表达式 ,并与实测值进行了对比 ,得到满意的验证 .Based on triaxial test results, the relationship between permanent strain, effective stress, and loading cycles is obtained for clay in shanghai . Analysis of the cyclic triaxial test results of three kinds of soft soils in Shanghai shows that a certain regularity exists between the dynamic shear modulus and the shear strain, and between the damping ratio and the shear strain of the three kinds of soils. In addition, mathematical expressions of the dynamic shear modulus ratio shear strain and the damping ratio shear strain are presented for soils in Shanghai. Compared with measured data, the calculated result is satisfactory.

关 键 词：软土 弹塑性模型 动剪切模量比 阻尼比 循环荷载 

分 类 号：TU447[建筑科学—岩土工程]