| 振动频率对LCES动力特性的影响分析及其机理初探 |
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| 引用本文： | 黎冰,高玉峰,丰土根.振动频率对LCES动力特性的影响分析及其机理初探[J].岩土力学,2008,29(10):2731-2734. |
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| 作者姓名： | 黎冰 高玉峰 丰土根 |
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| 作者单位： | 1. 岩土力学与堤坝工程教育部重点实验室,南京,210098;河海大学,岩土工程研究所,南京,210098;东南大学,土木工程学院,南京,210096
2. 岩土力学与堤坝工程教育部重点实验室,南京,210098;河海大学,岩土工程研究所,南京,210098 |
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| 基金项目： | 国家自然科学基金，江苏省教育厅青蓝工程项目，教育部留学回国人员科研启动基金 |
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| 摘 要： | 通过室内动三轴试验研究了0.02 Hz,0.1 Hz,1.0 Hz 3种振动频率对黏土与EPS颗粒混合轻质土(LCES)动力特性的影响.结果表明,振动频率对LCES的动力特性有明显的影响,当振动频率在0.02～1.0 Hz范围内变化时,随着振动频率的降低,试样的轴向动应变和阻尼比增大,动强度和动模量减小.和小频率加载相比,大频率加载情况下的孔压发展较慢,即有效应力相对较大,所以动应变越小而动强度越大.最后,从平均加载速率的概念出发,讨论了振动频率对土动力特性的影响.
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| 关 键 词： | 黏土与EPS颗粒混合轻质土 动三轴试验 振动频率 动力特性 机理 |
| 收稿时间： | 2007-03-14 |
Cyclic loading frequency effect and mechanism of lightweight clay-EPS beads soil |
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| LI Bing,GAO Yu-feng,Feng Tu-gen.Cyclic loading frequency effect and mechanism of lightweight clay-EPS beads soil[J].Rock and Soil Mechanics,2008,29(10):2731-2734. |
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| Authors: | LI Bing GAO Yu-feng Feng Tu-gen |
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| Institution: | 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 3. College of Civil Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | Based on a series of dynamic triaxial tests in which the frequency is equals to 0.02 Hz,0.1 Hz,1.0 Hz,the effect of cyclic loading frequency on the lightweight clay mixed with EPS beads soil(LCES) is investigated.The results of dynamic triaxial tests show that the cyclic loading frequency has obvious effect on the LCES,with the decreasing cyclic loading frequency,axial strain and damping ratio increase,dynamic strength and dynamic modulus decrease when cyclic loading frequency equals to 0.02-1.0 Hz.Compared... |
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| Keywords: | lightweight clay-EPS beads soil dynamic triaxial test cyclic loading frequency dynamic properties mechanism |
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