|
|||||
|
|
| 初始中主应力系数对中密粉煤灰动模量阻尼比影响的试验研究 | |
| 引用本文： | 郭莹,张小玲,栾茂田,刘洋,张吉宏.初始中主应力系数对中密粉煤灰动模量阻尼比影响的试验研究[J].岩土力学,2008,29(3):591-596. |
| 作者姓名： | 郭莹 张小玲 栾茂田 刘洋 张吉宏 |
| 作者单位： | 1. 大连理工大学,海岸和近海工程国家重点试验室,大连,116024;大连理工大学,土木水利学院岩土工程研究所,大连,116024 2. 大连理工大学,土木水利学院岩土工程研究所,大连,116024 3. 大连理工大学,海岸和近海工程国家重点试验室,大连,116024;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试验室,武汉,430071 |
| 基金项目： | 国家自然科学基金 , 国家自然科学基金 |
| 摘 要： | 利用土工静力-动力液压三轴-扭转多功能剪切仪,开展了在三向非均等固结状态下的饱和中密粉煤灰循环扭剪试验.着重探讨了初始中主应力系数对饱和中密粉煤灰的动模量和阻尼比特性的影响.试验结果表明:初始中主应力系数对粉煤灰动剪切模量有一定的影响,对阻尼比没有影响.根据仪器量测系统的特点,采用了大小位移计联合测量角位移的方法,不仅能够提高测试精度,而且能够获得完整的动模量和阻尼比随动剪应变幅值的变化过程. |
| 关 键 词： | 初始中主应力系数 循环扭剪试验 粉煤灰 动模量 阻尼比 中主应力系数 粉煤灰 动模量 阻尼比 影响 循环扭剪试验 研究 fly ash damping ratio dynamic shear modulus coefficient intermediate principal stress initial effect study 变化过程 应变幅值 随动 测试精度 方法 |
| 文章编号： | 1000-7598-(2008)03-0591-06 |
| 收稿时间： | 2006-09-27 |
| 修稿时间： | 2006年9月27日 |
Experimental study on effect of initial intermediate principal stress coefficient on dynamic shear modulus and damping ratio of medium-dense fly ash |
|
| GUO Ying,ZHANG Xiao-ling,LUAN Mao-tian,LIU Yang,ZHANG Ji-hong.Experimental study on effect of initial intermediate principal stress coefficient on dynamic shear modulus and damping ratio of medium-dense fly ash[J].Rock and Soil Mechanics,2008,29(3):591-596. | |
| Authors: | GUO Ying ZHANG Xiao-ling LUAN Mao-tian LIU Yang ZHANG Ji-hong |
| Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| Abstract: | The soil static and dynamic universal triaxial and torsional shear apparatus recently facilized in Dalian University of Technology is employed to perform experimental tests on flyash with relative density of Dr = 60 % under three-directional anisotropic consolidation subjected to cyclic torsional shear loading. Through a series of soil tests, the effects of initial intermediate principal stress coefficient on dynamic shear modulus and damping ratio of medium-dense fly ash are investigated systematically. Based on the specialty of the apparatus, not only the precision of experiment can be improved by using the small angle displacement sensors and large angle displacement sensor installed in the triaxial cell, but also the whole changes of dynamic modulus and damping ratio with amplitude of dynamic shear strain can be obtained continuously. |
| Keywords: | initial intermediate principal stress coefficient cyclic torsional shear tests fly ash dynamic modulus damping ratio |
| 本文献已被 维普 万方数据 等数据库收录！ | |
| 点击此处可从《岩土力学》浏览原始摘要信息 | |
| 点击此处可从《岩土力学》下载免费的PDF全文 | |