高速铁路泡沫轻质土路基动力响应分析
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摘要
高速铁路路基长期受到列车动荷载作用,其动力响应直接关系到列车正常运营及铁路的平顺性,泡沫轻质土作为新型路基填料能够较好控制路基沉降并降低后期养护运营成本.利用Abaqus软件建立CRH3高速列车、CRTS Ⅱ板式无砟轨道和泡沫轻质土路基耦合的三维竖向动力分析模型,对泡沫轻质土路基的动应力和动位移分布进行有限元模拟分析,分析结果表明:由于泡沫轻质土路基对于应力波具有吸收和分散作用,等效应力幅值与竖向动位移均沿轨道中心线对称分布且随着距离轨道中新线距离的增大以及路基深度的增加而逐渐衰减.
The dynamic response of high-speed railway subgrade is affected by the dynamic load of trains for a long time.Its dynamic response is directly related to the normal operation of trains and the ride comfort of railways.As a new type of roadbed filling,foamed lightweight soil can better control the settlement of subgrade and reduce the maintenance and operation cost.In this paper,the software is built by Abaqus.The vertical dynamic analysis model of CRH3 high-speed train,CRTS Ⅱ slab ballastless track and foam lightweight soil roadbed is coupled.The dynamic stress and dynamic displacement distribution of foamed lightweight soil roadbed are simulated by finite element method.The analysis results show that due to the absorption and dispersion of the stress wave,the equivalent stress amplitude and vertical dynamic displacement are symmetrically distributed along the centerline of the track,and gradully decay along with the increase of the distance between the new lines in the distance track and the increase of the roadbed depth.
The dynamic response of high-speed railway subgrade is affected by the dynamic load of trains for a long time.Its dynamic response is directly related to the normal operation of trains and the ride comfort of railways.As a new type of roadbed filling,foamed lightweight soil can better control the settlement of subgrade and reduce the maintenance and operation cost.In this paper,the software is built by Abaqus.The vertical dynamic analysis model of CRH3 high-speed train,CRTS Ⅱ slab ballastless track and foam lightweight soil roadbed is coupled.The dynamic stress and dynamic displacement distribution of foamed lightweight soil roadbed are simulated by finite element method.The analysis results show that due to the absorption and dispersion of the stress wave,the equivalent stress amplitude and vertical dynamic displacement are symmetrically distributed along the centerline of the track,and gradully decay along with the increase of the distance between the new lines in the distance track and the increase of the roadbed depth.
引文
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[9]陈忠平,汪建斌,刘吉福,等.泡沫轻质土动力工程特性试验研究[J].公路,2019(2):77-80.CHEN Zhongping,WANG Jianbin,LIU Jifu,et al.Experimental study on dynamic engineering properties of foamed lightweight soil[J].Highway,2019(2):77-80.(in Chinese)
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[14]ZHANG F R,YANG D G,ZHANG L J.Research on filling scheme and deformation properties of wide subgrade of foamed lightweight soil on soft ground[J].IOP Conference Series:Earth and Environmental Science,2018,108:022051.
[15]JENKINS H H.The effect of track and vehicle parameters on wheel/rail vertical dynamic forces[J].Railway Engineering Journal,1974,3(1):2-16.
[16]ROMERO A,GALVIN P,DOMINGUEZ J.A time domain analysis of train induced vibrations[J].Earthquakes and Structures,2012,3(3/4):297-313.
[17]GALVN P,ROMERO A,DOMNGUEZ J.Fully three-dimensional analysis of high-speed train-tracksoil-structure dynamic interaction[J].Journal of Sound and Vibration,2010,329(24):5147-5163.
[18]高培培.高速铁路列车-无砟轨道-路基耦合动力特性的有限元仿真方法研究[D].南京:东南大学,2014.GAO Peipei.Analysis of dynamic response of trainrail track-roadbed coupling system with finite element simulation model[D].Nanjing:Southeast University,2014.(in Chinese)
[19]苏谦,赵文辉,王亚威,等.泡沫轻质混凝土力学特性试验研究[J].铁道建筑,2016(4):144-148.SU Qian,ZHAO Wenhui,WANG Yawei,et al.Experimental research on mechanical properties of foam lightweight concrete[J].Railway Engineering,2016(4):144-148.(in Chinese)
[20]孙璐,段雨芬,赵磊,等.高速铁路CRTSⅡ型板式无砟轨道结构动力特性分析[J].东南大学学报(自然科学版),2014,44(2):406-412.SUN Lu,DUAN Yufen,ZHAO Lei,et al.Dynamic response analysis of CRTSⅡballastless track structure of high-speed railway[J].Journal of Southeast University(Natural Science Edition),2014,44(2):406-412.(in Chinese)
[21]魏金彩.无缝线路状态对高速铁路轨道结构动力学性能的影响[D].北京:北京交通大学,2013.WEI Jincai.Effect of CWR state on dynamic performance of track structure in high-speed railway[D].Beijing:Beijing Jiaotong University,2013.(in Chinese)
[22]陈丽英.高速铁路无砟轨道基础结构的动力响应分析[D].重庆:重庆交通大学,2015.CHEN Liying.Analysis on dynamic response of ballastless track subgrade of high-speed railway[D].Chongqing:Chongqing Jiaotong University,2015.(in Chinese)
[23]杜衍庆,白明洲,倪守睿.列车相向运行对双线无砟轨道高速铁路路基动应力响应分析[J].北京工业大学学报,2014,40(4):580-585.DU Yanqing,BAI Mingzhou,NI Shourui.Analysis of the subgrade dynamic stress under the trains opposite running on double-track high-speed railway[J].Journal of Beijing University of Technology,2014,40(4):580-585.(in Chinese)
[24]马学宁,梁波,高峰.高速铁路板式无砟轨道-路基结构动力特性研究[J].铁道学报,2011,33(2):72-78.MA Xuening,LIANG Bo,GAO Feng.Study on the dynamic properties of slab ballastless track and subgrade structure on high-speed railway[J].Journal of the China Railway Society,2011,33(2):72-78.(in Chinese)
[25]SONG X L,ZHAI W M.Dynamic stress distribution of high-speed railway non-ballasted track infrastructure[J].Journal of Sichuan University,2011,43(S2):156-160.
[26]宋小林,翟婉明.高速移动荷载作用下CRTSⅡ型板式无砟轨道基础结构动应力分布规律[J].中国铁道科学,2012,33(4):1-7.SONG Xiaolin,ZHAI Wanming.Dynamic stress distribution of the infrastructure of CRTSⅡslab ballastless track under high speed moving load[J].China Railway Science,2012,33(4):1-7.(in Chinese)
[27]王启云,张家生,孟飞,等.高速铁路轨道路基模型及动力加载研究[J].铁道学报,2012,34(12):90-95.WANG Qiyun,ZHANG Jiasheng,MENG Fei,et al.Study on track-subgrade model of high-speed railway and dynamical loading[J].Journal of the China Railway Society,2012,34(12):90-95.(in Chinese)
[2]HOU T S.Prescription formula of foamed particles in lightweight soil[J].Geotechnical and Geological Engineering,2015,33(1):153-160.
[3]朱俊杰,刘鑫,洪宝宁,等.气泡混合轻质土路堤最佳浇筑厚度的确定方法[J].岩土力学,2016,37(12):3642-3649.ZHU Junjie,LIU Xin,HONG Baoning,et al.Amethod for determining optimum casting thickness of foamed mixture lightweight soil embankment[J].Rock and Soil Mechanics,2016,37(12):3642-3649.(in Chinese)
[4]杨春风,庄灿,李洪亮,等.泡沫轻质土用于软基路基拓宽时应力应变分析[J].广西大学学报(自然科学版),2016,41(1):234-245.YANG Chunfeng,ZHUANG Can,LI Hongliang,et al.A-nalysis on stress-strain relationship of foamed lightweight soil in widening of freeway on soft soil foundation[J].Journal of Guangxi University(Natural Science Edition),2016,41(1):234-245.(in Chinese)
[5]王立军,叶阳升,张千里,等.泡沫轻质土的浸水性能试验研究[J].铁道建筑,2017(1):103-106.WANG Lijun,YE Yangsheng,ZHANG Qianli,et al.Experimental study on behavior of foamed light soil in water immersion[J].Railway Engineering,2017(1):103-106.(in Chinese)
[6]裘友强,李永良,张留俊,等.泡沫轻质土的性能试验研究[J].路基工程,2017(6):90-93.QIU Youqiang,LI Yongliang,ZHANG Liujun,et al.Experimental study on performance of foamed lightweight soil[J].Subgrade Engineering,2017(6):90-93.(in Chinese)
[7]周平,王志杰,张家瑞,等.高速铁路新型路基材料的动响应减振研究[J].振动与冲击,2017,36(13):230-237.ZHOU Ping,WANG Zhijie,ZHANG Jiarui,et al.Vibration reduction effects of new-type roadbed material of high-speed railway[J].Journal of Vibration and Shock,2017,36(13):230-237.(in Chinese)
[8]杨琪,张友谊,刘华强,等.一种气泡轻质土路基受载-破坏模型试验[J].岩土力学,2018,39(9):3121-3129.YANG Qi,ZHANG Youyi,LIU Huaqiang,et al.Model test on load-failure of a foamed lightweight soil subgrade[J].Rock and Soil Mechanics,2018,39(9):3121-3129.(in Chinese)
[9]陈忠平,汪建斌,刘吉福,等.泡沫轻质土动力工程特性试验研究[J].公路,2019(2):77-80.CHEN Zhongping,WANG Jianbin,LIU Jifu,et al.Experimental study on dynamic engineering properties of foamed lightweight soil[J].Highway,2019(2):77-80.(in Chinese)
[10]JONES R,MCCARTHY A,KHARIDU S,et al.Foamed concrete developments and applications[J].Concrete,2005,39(8):41-43.
[11]路通,杨平,李美霞,等.软土地基泡沫轻质土路基变形性状分析[J].路基工程,2018(1):38-41.LU Tong,YANG Ping,LI Meixia,et al.Analysis of deformation behavior of foamed lightweight soil subgrade on soft soil foundation[J].Subgrade Engineering,2018(1):38-41.(in Chinese)
[12]李硕,杨军宏.泡沫轻质土在高速公路改扩建工程中的应用[J].公路交通科技,2018,35(增1):1-6.LI Shuo,YANG Junhong.Application of foamed lightweight soil in expressway reconstruction and extension project[J].Journal of Highway and Transportation Research and Development,2018,35(S1):1-6.(in Chinese)
[13]LI Z L,ZHANG K F.Application and research on new technology of foam lightweight soil in treatment of soft soil foundation of railway engineering[J].Applied Mechanics and Materials,2012,204/205/206/207/208:1622-1625.
[14]ZHANG F R,YANG D G,ZHANG L J.Research on filling scheme and deformation properties of wide subgrade of foamed lightweight soil on soft ground[J].IOP Conference Series:Earth and Environmental Science,2018,108:022051.
[15]JENKINS H H.The effect of track and vehicle parameters on wheel/rail vertical dynamic forces[J].Railway Engineering Journal,1974,3(1):2-16.
[16]ROMERO A,GALVIN P,DOMINGUEZ J.A time domain analysis of train induced vibrations[J].Earthquakes and Structures,2012,3(3/4):297-313.
[17]GALVN P,ROMERO A,DOMNGUEZ J.Fully three-dimensional analysis of high-speed train-tracksoil-structure dynamic interaction[J].Journal of Sound and Vibration,2010,329(24):5147-5163.
[18]高培培.高速铁路列车-无砟轨道-路基耦合动力特性的有限元仿真方法研究[D].南京:东南大学,2014.GAO Peipei.Analysis of dynamic response of trainrail track-roadbed coupling system with finite element simulation model[D].Nanjing:Southeast University,2014.(in Chinese)
[19]苏谦,赵文辉,王亚威,等.泡沫轻质混凝土力学特性试验研究[J].铁道建筑,2016(4):144-148.SU Qian,ZHAO Wenhui,WANG Yawei,et al.Experimental research on mechanical properties of foam lightweight concrete[J].Railway Engineering,2016(4):144-148.(in Chinese)
[20]孙璐,段雨芬,赵磊,等.高速铁路CRTSⅡ型板式无砟轨道结构动力特性分析[J].东南大学学报(自然科学版),2014,44(2):406-412.SUN Lu,DUAN Yufen,ZHAO Lei,et al.Dynamic response analysis of CRTSⅡballastless track structure of high-speed railway[J].Journal of Southeast University(Natural Science Edition),2014,44(2):406-412.(in Chinese)
[21]魏金彩.无缝线路状态对高速铁路轨道结构动力学性能的影响[D].北京:北京交通大学,2013.WEI Jincai.Effect of CWR state on dynamic performance of track structure in high-speed railway[D].Beijing:Beijing Jiaotong University,2013.(in Chinese)
[22]陈丽英.高速铁路无砟轨道基础结构的动力响应分析[D].重庆:重庆交通大学,2015.CHEN Liying.Analysis on dynamic response of ballastless track subgrade of high-speed railway[D].Chongqing:Chongqing Jiaotong University,2015.(in Chinese)
[23]杜衍庆,白明洲,倪守睿.列车相向运行对双线无砟轨道高速铁路路基动应力响应分析[J].北京工业大学学报,2014,40(4):580-585.DU Yanqing,BAI Mingzhou,NI Shourui.Analysis of the subgrade dynamic stress under the trains opposite running on double-track high-speed railway[J].Journal of Beijing University of Technology,2014,40(4):580-585.(in Chinese)
[24]马学宁,梁波,高峰.高速铁路板式无砟轨道-路基结构动力特性研究[J].铁道学报,2011,33(2):72-78.MA Xuening,LIANG Bo,GAO Feng.Study on the dynamic properties of slab ballastless track and subgrade structure on high-speed railway[J].Journal of the China Railway Society,2011,33(2):72-78.(in Chinese)
[25]SONG X L,ZHAI W M.Dynamic stress distribution of high-speed railway non-ballasted track infrastructure[J].Journal of Sichuan University,2011,43(S2):156-160.
[26]宋小林,翟婉明.高速移动荷载作用下CRTSⅡ型板式无砟轨道基础结构动应力分布规律[J].中国铁道科学,2012,33(4):1-7.SONG Xiaolin,ZHAI Wanming.Dynamic stress distribution of the infrastructure of CRTSⅡslab ballastless track under high speed moving load[J].China Railway Science,2012,33(4):1-7.(in Chinese)
[27]王启云,张家生,孟飞,等.高速铁路轨道路基模型及动力加载研究[J].铁道学报,2012,34(12):90-95.WANG Qiyun,ZHANG Jiasheng,MENG Fei,et al.Study on track-subgrade model of high-speed railway and dynamical loading[J].Journal of the China Railway Society,2012,34(12):90-95.(in Chinese)
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