辽西风积土动剪切模量与阻尼比特性试验研究
|
摘要
研究辽西风积土的动力特性离不开其动剪切模量与阻尼比这两个最基本的参数.通过一系列动三轴试验,分析了围压、固结比、振动频率对原状风积上的动剪切模量与阻尼比的影响情况,并探讨了其产生的机理.通过试验数据分析表明,风积土的动剪切模量随围压的增大而增大,但阻尼比随围压的增大而减小;动剪切模量随固结比的增大而增大,阻尼比随固结比的增大而减小;动剪切模量和阻尼比均随振动频率的增大而增大,但影响较小,不如前两个因素明显.
Dynamic shear modulus and damping ratio are two main parameters when dynamic performance of aeolian soil in west Liaoning province is researched.This paper analyses the influence of confining pressure, consolidation ratio and frequency of vibration on dynamic shear modulus and damping ratio of aeolian soil though a series of dynamic triaxial tests.Experimental results show that the dynamic shear modulus of aeolian soil increases with the confining pressure and the consolidation ratio up,just the opposite,the damping ratio decreases;the dynamic shear modulus and the consolidation ratio decreases with the frequency of vibration up, but unlike the two factors above,the influence is small.
Dynamic shear modulus and damping ratio are two main parameters when dynamic performance of aeolian soil in west Liaoning province is researched.This paper analyses the influence of confining pressure, consolidation ratio and frequency of vibration on dynamic shear modulus and damping ratio of aeolian soil though a series of dynamic triaxial tests.Experimental results show that the dynamic shear modulus of aeolian soil increases with the confining pressure and the consolidation ratio up,just the opposite,the damping ratio decreases;the dynamic shear modulus and the consolidation ratio decreases with the frequency of vibration up, but unlike the two factors above,the influence is small.
引文
1张向东,冯胜洋,潘宇.二灰改良风积上动力特性试验.中国地质灾害与防治学报,2010,21(2):89-93(Zhang Xiangdong, Feng Shengyang,Pan Yu.Experimental study on dynamic performance for lime-flyash-improved aeolian soil The Chinese Journal of Geological Hazard and Control, 2010,21(2):89-93(in Chinesr))
2谢定义.中国土力学的发展现状与存在的问题.西北地震学报, 2007,29(1):94-95(Xie Dingyi.Developing situation and problems of soil dynamics in China.Northwest Seismol Gical Journal,2007,29(1):94-95(in Chinese))
3 Hardin BO,Black WL.Vihration modulars of normal consolidated clay.J Soil Meth Found Div,ASCE,1968, 94(SM2)
4 Hnrdin BO.Drnevich VP.Shear modulus and damping in soils design equation curves.J Soil Mech Found Div, ASCE,1972,98(7):279-287
5 Hardin BO,Black WL.Closure to vibration modulus of normally consolidated clay:design equations and curves.J Soil Mech Found Div,ASCE,1969,95(6):1531-1537
6 Hardin BO,Drnevich VP.Shear modulus and damping in soil:measurement and parameter effects.J Soil Mech Found Div,ASCE,1972,98(6):603-624
7翟瑞彩.软黏土动剪切模量的研究.力学与实践,1996,18(6): 42-44(Zhai Ruicai.Research of dynamic shear modulus of soft clay.Mechanics in Engineering,1996,18(6):42-44(in Chinese))
8梁旭,蔡袁强.复合地基动弹性模量和阻尼比的试验研究.土木工程学报,2004,37(1):96-101(Liang Xu,Cai Yuangqang. Study on the elastic modulus and the damping ratio of compostie foundation.China Civil Engineering Journal, 2004,37(1):96-101(in Chinese))
9 Eshelby JD.The determination of the elastic field of an ellipsoidal inclusion and related problems.Proceedings of the Royal Society of London(Series A),1957,241(1226): 376-396
10袁晓铭,孙锐,孙静等.常规土类动剪切模量比和阻尼比试验研究.地震工程与工程振动.2000,20(4):133-139(Yuan Xiaoming, Sun Yue,Sun Jing,et al.Laboratory experimental study on dynamic shear modulus ratio and damping ratio of soils.Earthquake Engineering and Engineering Vibration, 2000,20(4):133-139(in Chinese))
11袁聚云.土工试验规范.上海:同济大学出版社,2003(Yuan Juyun.Soil Test Standard.Shanghai:Tongji University Press,2003(in Chinese))
12张向东,刘功勋,于崇等.辽西地区风积土结构特性试验研究.岩土力学,2008,29(3):691-695(Zhang Xiangdong,Liu Gongxun,Yu Cong,et al.Testing study on structural character of aeolian soil in western area of Liaoning Province. Rock and Soil Mechanics,2008,29(3):691-695(in Chinese))
13尚守平,卢华喜,任慧等.粉质黏土动剪切模量的试验对比研究.岩土工程学报,2006,28(3):410-414(Shang Shouping, Lu Huaxi,Ren Hui,et al.Comparative study on dynamic shear modulus of silty clay.Chinese Journal of Geotechnical Engineering,2006,28(3):410-414(in Chinese))
14 Lambe TW,Robert VW.Soil Mechanics.New York:John-Wiley and Sons,Inc.1969
2谢定义.中国土力学的发展现状与存在的问题.西北地震学报, 2007,29(1):94-95(Xie Dingyi.Developing situation and problems of soil dynamics in China.Northwest Seismol Gical Journal,2007,29(1):94-95(in Chinese))
3 Hardin BO,Black WL.Vihration modulars of normal consolidated clay.J Soil Meth Found Div,ASCE,1968, 94(SM2)
4 Hnrdin BO.Drnevich VP.Shear modulus and damping in soils design equation curves.J Soil Mech Found Div, ASCE,1972,98(7):279-287
5 Hardin BO,Black WL.Closure to vibration modulus of normally consolidated clay:design equations and curves.J Soil Mech Found Div,ASCE,1969,95(6):1531-1537
6 Hardin BO,Drnevich VP.Shear modulus and damping in soil:measurement and parameter effects.J Soil Mech Found Div,ASCE,1972,98(6):603-624
7翟瑞彩.软黏土动剪切模量的研究.力学与实践,1996,18(6): 42-44(Zhai Ruicai.Research of dynamic shear modulus of soft clay.Mechanics in Engineering,1996,18(6):42-44(in Chinese))
8梁旭,蔡袁强.复合地基动弹性模量和阻尼比的试验研究.土木工程学报,2004,37(1):96-101(Liang Xu,Cai Yuangqang. Study on the elastic modulus and the damping ratio of compostie foundation.China Civil Engineering Journal, 2004,37(1):96-101(in Chinese))
9 Eshelby JD.The determination of the elastic field of an ellipsoidal inclusion and related problems.Proceedings of the Royal Society of London(Series A),1957,241(1226): 376-396
10袁晓铭,孙锐,孙静等.常规土类动剪切模量比和阻尼比试验研究.地震工程与工程振动.2000,20(4):133-139(Yuan Xiaoming, Sun Yue,Sun Jing,et al.Laboratory experimental study on dynamic shear modulus ratio and damping ratio of soils.Earthquake Engineering and Engineering Vibration, 2000,20(4):133-139(in Chinese))
11袁聚云.土工试验规范.上海:同济大学出版社,2003(Yuan Juyun.Soil Test Standard.Shanghai:Tongji University Press,2003(in Chinese))
12张向东,刘功勋,于崇等.辽西地区风积土结构特性试验研究.岩土力学,2008,29(3):691-695(Zhang Xiangdong,Liu Gongxun,Yu Cong,et al.Testing study on structural character of aeolian soil in western area of Liaoning Province. Rock and Soil Mechanics,2008,29(3):691-695(in Chinese))
13尚守平,卢华喜,任慧等.粉质黏土动剪切模量的试验对比研究.岩土工程学报,2006,28(3):410-414(Shang Shouping, Lu Huaxi,Ren Hui,et al.Comparative study on dynamic shear modulus of silty clay.Chinese Journal of Geotechnical Engineering,2006,28(3):410-414(in Chinese))
14 Lambe TW,Robert VW.Soil Mechanics.New York:John-Wiley and Sons,Inc.1969
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心