路基上CRTSⅡ型板式轨道纠偏作业损伤扩展规律
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摘要
基于纠偏作业工艺,建立了路基上中国铁路轨道系统(CRTS)Ⅱ型板式轨道有限元模型,研究轨道板宽窄接缝离缝、轨道板砂浆层离缝、支承层裂纹在纠偏作业中的扩展规律.结果表明:宽窄接缝离缝会减弱轨道板宽窄接缝粘结界面抵抗损伤的能力;砂浆层离缝对轨道板砂浆层粘结界面损伤的影响较小;支承层裂纹在纠偏作业过程中会进一步向支承层内部扩展.
Based on the displacement correcting method, the China railway track system(CRTS)Ⅱ slab track was modelled in a finite element software. The damage propagation laws of wide and narrow joint separation, mortar-layer separation and supporting-layer cracks during the correction process are studied. The results show that the wide and narrow joint separation would decrease the ability to resist damage of the bonding interface; the mortar-layer separation made little influence on bonding interface; the supporting-layer cracks would grow deeper into the inside of the supporting-layer during the correction process.
Based on the displacement correcting method, the China railway track system(CRTS)Ⅱ slab track was modelled in a finite element software. The damage propagation laws of wide and narrow joint separation, mortar-layer separation and supporting-layer cracks during the correction process are studied. The results show that the wide and narrow joint separation would decrease the ability to resist damage of the bonding interface; the mortar-layer separation made little influence on bonding interface; the supporting-layer cracks would grow deeper into the inside of the supporting-layer during the correction process.
引文
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[8] 刘学毅,苏成光,刘丹,等.轨道板与砂浆粘结试验及内聚力模型参数研究[J].铁道工程学报,2017,34(3):22.LIU Xueyi,Su Chenguang,LIU Dan,et al.Research on the bond properties between slab and CA mortar and the parameters study of cohesive mode[J].Journal of Railway Engineering Society,2017,34(3):22.
[9] ZHANG Z,PAULINO G H.Cohesive zone modeling of dynamic failure in homogeneous and functionally graded materials[J].International Journal of Plasticity,2005,21(6):1195.
[10] HU N,ZEMBA Y,OKABE T,et al.A new cohesive model for simulating delamination propagation in composite laminates under transverse loads[J].Mechanics of Materials,2008,40(11):920.
[11] 董佳佳.CRTSⅡ型板式轨道宽窄接缝温度荷载下受力及损伤行为研究[D].成都:西南交通大学,2017.DONG Jiajia.Research on damage mechanism of wide and narrow joints in CRTSⅡ slab track structure under temperature load[D].Chengdu:Southwest Jiaotong University,2017.
[12] 刘钰,赵国堂.CRTSⅡ型板式无砟轨道结构层间早期离缝研究[J].中国铁道科学,2013,34(4):1.LIU Yu,ZHAO Guotang.Analysis of early gap between layers of CRTSⅡ slab ballastless track structure[J].China Railway Science,2013,34(4):1.
[13] 张广义.砂浆充填层劣化对CRTSⅡ型板式无砟轨道力学特性影响的研究[D].长沙:中南大学,2013.ZHANG Guangyi.Study of the effect of cement asphalt mortar disease on mechanical properties of CRTS II slab ballastless Track[D].Changsha:Central South University,2013.
[14] 朱胜阳,蔡成标.温度和列车动荷载作用下双块式无砟轨道道床板损伤特性研究[J].中国铁道科学,2012,33(1):6.ZHU Shengyang,CAI Chengbiao.Research on the damage characteristics of double-block ballastless rack bed slab under temperature and vehicle dynamic loads[J].China Railway Science,2012,33(1):6.
[2] 徐伟昌,许玉德,谭社会,等.高速铁路无砟轨道线路质量等级管理[M].北京:中国铁道出版社,2016.XU Weichang,XU Yude,TAN Shehui,et al.Track quailty grade management of high-speed railway ballastless track[M].Beijing:China Railway Press,2016.
[3] 肖军华,王炳龙,王长丹,等.高速铁路路基不均匀沉降及其控制[M].上海:同济大学出版社,2015.XIAO Junhua,WANG Binglong,WANG changdan,et al.Uneven settlement of high-speed railway subgrade and its control[M].Shanghai:Tongji University Press,2015.
[4] 徐伟昌,李振廷,王永华,等.WJ-7型大调量扣件地段轨道动力响应测试及分析[J].铁道标准设计,2014(10):26.XU Weichang,LI Zhenting,WANG Yonghua,et al.Test and analysis of track dynamic response on the sections with WJ-7 fastenings of large adjustment[J].Railway Standard Design,2014(10):26.
[5] 谭社会.高速铁路无砟轨道线形纠偏技术进展研究[J].铁道科学与工程学报,2018(2):310.TAN Shehui.State of lifting and inclination correction technique of high-speed railway ballastless track[J].Journal of Railway Science and Engineering,2018(2):310.
[6] 邢小墨.高速铁路无砟轨道抬升纠偏新技术研究[J].铁道建筑技术,2016(4):107.XING Xiaomo.New technology for lifting and inclination correction of the high-speed railway ballastless track[J].Railway Construction Technology,2016(4):107.
[7] 温希华.高速铁路CRTSⅡ型板式无砟轨道纠偏技术研究[J].铁道勘察,2017,43(1):6.WEN Xihua.Research on the deviation rectification technology for high-speed railway of CRTSⅡ slab ballastless track[J].Railway Investigation and Surveying,2017,43(1):6.
[8] 刘学毅,苏成光,刘丹,等.轨道板与砂浆粘结试验及内聚力模型参数研究[J].铁道工程学报,2017,34(3):22.LIU Xueyi,Su Chenguang,LIU Dan,et al.Research on the bond properties between slab and CA mortar and the parameters study of cohesive mode[J].Journal of Railway Engineering Society,2017,34(3):22.
[9] ZHANG Z,PAULINO G H.Cohesive zone modeling of dynamic failure in homogeneous and functionally graded materials[J].International Journal of Plasticity,2005,21(6):1195.
[10] HU N,ZEMBA Y,OKABE T,et al.A new cohesive model for simulating delamination propagation in composite laminates under transverse loads[J].Mechanics of Materials,2008,40(11):920.
[11] 董佳佳.CRTSⅡ型板式轨道宽窄接缝温度荷载下受力及损伤行为研究[D].成都:西南交通大学,2017.DONG Jiajia.Research on damage mechanism of wide and narrow joints in CRTSⅡ slab track structure under temperature load[D].Chengdu:Southwest Jiaotong University,2017.
[12] 刘钰,赵国堂.CRTSⅡ型板式无砟轨道结构层间早期离缝研究[J].中国铁道科学,2013,34(4):1.LIU Yu,ZHAO Guotang.Analysis of early gap between layers of CRTSⅡ slab ballastless track structure[J].China Railway Science,2013,34(4):1.
[13] 张广义.砂浆充填层劣化对CRTSⅡ型板式无砟轨道力学特性影响的研究[D].长沙:中南大学,2013.ZHANG Guangyi.Study of the effect of cement asphalt mortar disease on mechanical properties of CRTS II slab ballastless Track[D].Changsha:Central South University,2013.
[14] 朱胜阳,蔡成标.温度和列车动荷载作用下双块式无砟轨道道床板损伤特性研究[J].中国铁道科学,2012,33(1):6.ZHU Shengyang,CAI Chengbiao.Research on the damage characteristics of double-block ballastless rack bed slab under temperature and vehicle dynamic loads[J].China Railway Science,2012,33(1):6.