全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

低震多频高烈度区黄土的动弹性模量和阻尼比特性

Keywords: 道路工程,动弹性模量,动三轴试验,边坡黄土,阻尼比

Full-Text   Cite this paper   Add to My Lib

Abstract:

在调查山西地震动历史事件的基础上,对山西汾渭地堑带上高速公路边坡黄土进行了动力特性参数的试验研究。首先,选取典型黄土边坡进行现场爆破试验获取了边坡黄土介质的地震动时程曲线;接着,以这些动力特性作为动三轴试验的模拟加载方式和参数,对不同路段边坡的30组马兰黄土(Q3)和离石黄土(Q2)进行了室内动三轴试验,获得了边坡黄土在低震多频动荷载下动力特性的一些规律冲击地震荷载作用下加速度幅值比正弦循环波幅值较大;相同的动荷载作用下,动弹性模量(Ed)越大,黄土的动黏聚力(Cd)越高,动摩擦角(φd)则越低,离石黄土(Q2)与马兰黄土(Q3)的初始动弹性模量(Ed0)分别为80~150kPa、25~100kPa;动弹性模量均值(Eda)分别为10~20kPa,10~30kPa;对二者的动应变(εd)-动阻尼比(λd)曲线拟合得动阻尼比(λd)的增长速率分别为马兰黄土(Q3)0.1998,离石黄土(Q2)为0.1285。

References

[1]  山西原平 4.2 级地震现场工作队.2009 年 3 月 28 日山西原平 4.2 级地震现场考察报告 [J].山西地震,2009 (3): 1-7.Field Work Group of Yuanping Earthquake of Ms4.2 inShanxi.Field Survey Report of the Mar.28,2009Yuanping Earthquake of Ms4.2 in Shanxi [J].Earthquake Research in Shanxi ,2009 (3): 1-7.
[2]  孟晓琴,刘林飞,吕睿.山西河津大同阳曲地震与速报技术探讨 [J].山西地震,2012 (3): 13-16.MENG Xiao- qin,LIU Lin- fei ,L Rui.Discussion onthe Hejin,Datong and Yangqu,Shanxi Earthquake andRapid Report Technology [J].Earthquake Research inShanxi,2010,2012 (3): 13-16.
[3]  ZHANG J F,ANDRUS R D,JUANG C H.NormalizedShear Modulus and Material Damping Ratio Relationships[J].Journal of Geotechnical and GeoenvironmentalEngineering,2005,131 (4): 453-464.
[4]  王峻,王兰民,李兰.不同地震荷载对黄土动模量和阻尼比的影响 [J].自然灾害学报,1992,1 (4) :75-79.WANG Jun,WANG Lan- min,LI Lan.The Effect ofDifferent Seismic Loadings on Dynamic Modulus andDamping Ratio of Loess [J].Journal of NaturalDisasters,1992,1 (4) : 75-79.
[5]  胡仲有,骆亚生,李焱.不同地区黄土阻尼比变化特性试验研究 [J].地震工程与工程振动,2010,30(2): 167-172.HU Zhong- you,LUO Ya- sheng,LI Yan.ExperimentalStudy on Damping Ratio Variation Characteristics of Loessin Different Areas [J].Journal of Earthquake Engineeringand Engineering Vibrition,2010,30 (2) : 167-172.
[6]  王志杰,骆亚生,王瑞瑞,等.不同地区原状黄土动剪切模量与阻尼比试验研究 [J].岩土工程学报,2010,32 (9): 1464-1469.WANG Zhi- jie,LUO Ya- sheng,WANG Rui- rui,et al.Experimental Study on Dynamic Shear Modulus andDamping Ratio of Undisturbed Loess in Different Regions[J].Chinese Journal of Geotechnical Engineering,2010,32 (9): 1464-1469.
[7]  骆亚生,田堪良.非饱和黄土的动剪模量与阻尼比[J].水力学报,2005,36 (7): 830-834.LUO Ya- sheng,TIAN Kan- liang.Dynamic Shear Modulusand Damping Ratio of Unsaturated Loess [J].JournalHydraulic Engineering,2005,36 (7): 830-834.
[8]  何昌荣.动模量和阻尼的动三轴试验研究 [J].工程地质学报,1997 (2): 39-48.HE Chang- rong.Dynamic Triaxial Test on Modulus andDamping
[9]  [J ].Chinese Journal of GeotechnicalEngineering,1997 (2): 39-48.
[10]  李兰,王兰民,王峻.随机振动荷载与等幅荷载作用下黄土动弹性模量和阻尼比的试验研究 [J].甘肃科学学报,1992 (4): 74-79.LI Lan,WANG Lan- min,WANG Jun.Test of LoessDynamic Elastic Modulus and Damping Ratio underRandom Vibration Loads with Constant Amplitude Loading[J].Journal of Gansu Sciences,1992 (4): 74-79.
[11]  陈存礼,何军芳,高鹏.不同含水量下原状黄土的动力变形特性 [J].西安理工大学学 报,2006,22(4): 390-394.CHEN Cun- li,HE Jun- fang,GAO Peng.DynamicDeformation Characteristic of Intact Loess under DifferentWater Content [J].Journal of Xi'an University ofTechnology,2006,22 (4): 390-394.
[12]  万战胜,杨喆,王家鼎.列车振动荷载作用下原状黄土动力特性试验 [J].煤田地质与勘探,2011,39(2): 47-51.WAN Zhan- sheng,YANG Zhe,WANG Jia- ding.Experimental Study on Dynamic Properties of Intact Loessunder Train Vibrating Load [J].Coal Geology andExploration,2011,39 (2): 47-51.
[13]  谢定义.动荷截下土的强度特性 [J].水利学报,1987,(12): 17-32.XIE Ding- yi.Strength Characteristic of Loess underDynamic Load [J].Journal of Hydraulic Engineering,1987,(12): 17-32.
[14]  陈国兴.岩土工程地震学 [M].北京: 科学出版社,2007.CHEN Guo- xing.Geotechnical Engineering Seismology[M].Beijing: Science Press,2007.
[15]  李萍,王秉纲,李同录,等.陕西地区黄土路堑高边坡可靠度研究 [J].中国公路学报,2009,22 (6):18-25.LI Ping ,WANG Bing- gang,LI Tong- lu,et al.Study ofReliability for Loess Cutting High Slopes in ShaanxiProvince [J].China Journal of Highway and Transport,2009,22 (6): 18-25.
[16]  王念秦,罗东海,姚勇,等.马兰黄土动强度及其微结构变化实验 [J].工程地质学报,2011,19 (4):467-471.WANG Nian- qin,LUO Dong- hai,YAO Yong,et al.Dynamic Strength and Micro Structure Change of MalanLoess under Triaxial Cyclic Loading [J].Journal ofEngineering Geology,2011,19 (4): 467-471.
[17]  栗润德,张鸿儒,白晓红,等.不同含水量下原状黄土动强度和震陷的试验研究 [J].工程地质学报,2007,15 (5): 694-699.LI Run- de,ZHANG Hong- ru,BAI Xiao- hong,et al.Dynamic Shear Strength and Seismic Subsidence of IntactLoess with Different Water Contents from Dynamic TriaxialTesting [J].Journal of Engineering Geology,2007,15(5): 694-699.
[18]  刘海松,倪万魁,颜斌.地质结构模型在公路黄土边坡设计中的作用 [J].中国公路学 报,2007,15(5): 1-6.LIU Hai- song,NI Wan- kui,YAN Bin.Effect of GeologicStructure Model in Highway Loess Slope [J].ChinaJournal of Highway and Transport,2007,15 (5): 1-6.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133