| 循环荷载下堆积体残余变形特性 |
| |
| 引用本文： | 孙志亮,孔令伟,郭爱国,田海.循环荷载下堆积体残余变形特性[J].西北地震学报,2015,37(2):481-486. |
| |
| 作者姓名： | 孙志亮 孔令伟 郭爱国 田海 |
| |
| 作者单位： | 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室 |
| |
| 基金项目： | 国家自然科学基金项目(41372314);中国科学院重点部署项目(KZZD-EW-05) |
| |
| 摘 要： | 通过大型动三轴试验研究堆积体在不同应力水平、不同循环荷载幅值下残余应变与振次的关系,同时进行不同初始条件下残余应变的对比。试验发现堆积体在循环荷载下的残余应变与lg(1+N)有较好的线性关系(N≤30),沈珠江经验公式适用于堆积体在循环荷载下累积残余应变的计算。初始条件对堆积体的残余应变有重要影响,饱和不排水条件下残余剪应变最大,饱和排水条件次之,风干排气条件最小。应用沈珠江残余应变公式进行堆积体循环荷载下残余变形计算时应选取与工程实际条件相匹配的参数。
|
| 关 键 词： | 堆积体 大型动三轴试验 残余变形 初始条件 |
| 收稿时间： | 2014/8/20 0:00:00 |
Residual Deformation Behavior of Deposits under Cyclic Loading |
| |
| SUN Zhi-liang,KONG Ling-wei,GUO Ai-guo and TIAN Hai.Residual Deformation Behavior of Deposits under Cyclic Loading[J].Northwestern Seismological Journal,2015,37(2):481-486. |
| |
| Authors: | SUN Zhi-liang KONG Ling-wei GUO Ai-guo and TIAN Hai |
| |
| Institution: | SUN Zhi-liang;KONG Ling-wei;GUO Ai-guo;TIAN Hai;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences; |
| |
| Abstract: | Residual deformation behaviors of deposits under cyclic loading at different stress levels and cyclic loading amplitudes are studied by a large-scale dynamic triaxial test.The residual deformation of the deposits under different initial conditions is also discussed.Residual strains under cyclic loading are found to show a linear relationship with lg(1+N) when N is less than 30.Shen''s empirical equation is suitable for calculating the residual strain of deposits under cyclic loading.The initial conditions have a significant effect on the residual strain of deposits.Residual shear strain is the largest under undrained conditions,medium under drained conditions,and smallest under air dried drainage conditions.When the residual deformation of the deposit under cyclic loading is calculated using Shen ''s equation,the equation''s parameters should match the actual engineering conditions. |
| |
| Keywords: | deposit large-scale dynamic triaxial test residual deformation initial condition |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《西北地震学报》浏览原始摘要信息 |
| 点击此处可从《西北地震学报》下载免费的PDF全文 |
