板式无砟轨道CA砂浆黏弹性特征
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摘要
为研究砂浆在列车荷载作用下、不同初始弹性模量时的黏弹性变形规律,以黏弹性理论与时间硬化率分析方法为基础,拟合得到砂浆的时间硬化率特征参数,通过ABAQUS建立基于时间硬化率的CRTS I型板式无砟轨道实体模型。研究结果表明:基于时间硬化率的分析模型能很好地模拟砂浆变形行为,拟合得到的特征参数较为合理;若砂浆初始弹性模量增大,则砂浆在黏弹性变形前、后应变差值逐渐减小,位移差值逐渐增大,位移差值集中于0.2～0.6 mm,变形敏感部位约在板端2.5个扣件间距处。砂浆本身黏弹性特征引起的不可恢复变形是导致砂浆与轨道板层间离缝的重要原因之一。
To study the viscoelastic deformation laws of CA mortar with different initial Young's modulus under cyclic train loads, the viscoelastic parameters of mortar were fitted according to the equation of time hardening rate, and the model of CRTS I slab track was established through ABAQUS, based on the viscoelasticity theory and the strain analysis of time hardening rate. The results show that the viscoelastic performance of mortar can be described well with the model of time hardening rate, and the fitted viscoelastic parameters are reasonable. With the increase of the initial Young's modulus of mortar, the strain difference of mortar before and after its deforming gradually decreases, while its displacement difference increases gradually ranging from 0.2 mm to 0.6 mm. The deformation is mainly distributed on the slab end, which is about 2.5 times of the fastening spacing longitudinally. The viscoelastic performance of mortar produces an irreversible deformation, which plays a significant role in leading to the contact loss between the mortar layer and the track slab.
To study the viscoelastic deformation laws of CA mortar with different initial Young's modulus under cyclic train loads, the viscoelastic parameters of mortar were fitted according to the equation of time hardening rate, and the model of CRTS I slab track was established through ABAQUS, based on the viscoelasticity theory and the strain analysis of time hardening rate. The results show that the viscoelastic performance of mortar can be described well with the model of time hardening rate, and the fitted viscoelastic parameters are reasonable. With the increase of the initial Young's modulus of mortar, the strain difference of mortar before and after its deforming gradually decreases, while its displacement difference increases gradually ranging from 0.2 mm to 0.6 mm. The deformation is mainly distributed on the slab end, which is about 2.5 times of the fastening spacing longitudinally. The viscoelastic performance of mortar produces an irreversible deformation, which plays a significant role in leading to the contact loss between the mortar layer and the track slab.
引文
[1]LI Guoqiang,ZHAO Y Z,PANG Suseng,et al.Experimental study of cement-asphalt emulsion composite[J].Cement&Concrete Research,1998,28(5):635-641.
[2]王涛.高速铁路板式无碴轨道CA砂浆的研究与应用[D].武汉:武汉理工大学土木工程与建筑学院,2008:76-98.WANG Tao.Research and application on CA mortar in ballastless slab track of high speed railway[D].Wuhan:Wuhan University of Technology.School of Civil Engineering&Architecture,2008:76-98.
[3]刘哲.温度荷载对CRTS I型板式轨道CA砂浆充填层影响规律研究[D].成都:西南交通大学土木工程学院,2016:79-85.LIU Zhe.Effect of temperature load on CA mortar filling layer of CRTS I slab track[D].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2016:79-85.
[4]MONISMITH C L,SECOR K E.Viscoelastic behavior of asphalt concrete pavements[C]//Ann Arbor.First International Conference on the Structural Design of Asphalt Pavements.Michigan,USA:University of Michigan,1962:476-498.
[5]ZHANG W,DRESCHER A,NEWCOMB D E.Viscoelastic analysis of diametral compression of asphalt concrete[J].Journal of Engineering Mechanics,1997,123(6):596-603.
[6]ZHANG W,DRESCHER A,NEWCOMB D E.Viscoelastic behavior of asphalt concrete in diametral compression[J].Journal of Transportation Engineering,1997,123(6):495-502.
[7]LEE H J,KIM Y R.Viscoelastic continuum damage model of asphalt concrete with healing[J].Journal of Engineering Mechanics,1998,124(11):1224-1232.
[8]LEE H J,DANIEL J S,KIM Y R.Continuum damage mechanics-based fatigue model of asphalt concrete[J].Journal of Materials in Civil Engineering,2000,12(2):105-112.
[9]周志刚,钱国平,郑健龙.沥青混合料黏弹性参数测定方法的研究[J].交通科学与工程,2001,17(4):23-28.ZHOU Zhigang,QIAN Guoping,ZHENG Jianlong.Research on the measurement of viscoelastic parameters of asphalt mixture[J].Traffic Science and Engineering,2001,17(4):23-28.
[10]陈静云,周长红,王哲人.沥青混合料蠕变试验数据处理与黏弹性计算[J].东南大学学报(自然科学版),2007,37(6):1091-1095.CHEN Jingyun,ZHOU Changhong,WANG Zheren.Data processing and viscoelastic computation for creep test of asphalt mixture[J].Journal of Southeast University(Natural Science Edition),2007,37(6):1091-1095.
[11]李晓军,江丽华.沥青砂浆粘弹特性试验与模型参数分析[J].武汉理工大学学报,2011,33(3):82-86.LI Xiaojun,JIANG Lihua.Test and model parameter analysis of asphaltic sand with viscoelasticity[J].Journal of Wuhan University of Technology,2011,33(3):82-86.
[12]徐世法.表征沥青及沥青混合料高低温蠕变性能的流变学模型[J].力学与实践,1992,14(1):37-40.XU Shifa.Rheological model for asphalt mixture at high and low temperature characterizing creep properties[J].Mechanics in Engineering,1992,14(1):37-40.
[13]徐浩,王平,谢铠泽,等.水泥乳化沥青砂浆短期蠕变特性试验与模型参数分析[J].铁道学报,2015,37(9):114-118.XU Hao,WANG Ping,XIE Kaize,et al.Test and model parameter analysis of cement and emulsified asphalt mortar with short-term creep property[J].Journal of the China Railway Society,2015,37(9):114-118.
[14]徐庆元,李斌,周小林.高速列车作用下路基上板式无砟轨道动力系数[J].中南大学学报(自然科学版),2011,42(9):2831-2836.XU Qingyuan,LI Bin,ZHOU Xiaolin.Dynamic coefficient of slab track system on subgrade under high-speed trains[J].Journal of Central South University(Science and Technology),2011,42(9):2831-2836.
[15]梁飞.CRTS I型板式无砟轨道力学特性研究[D].长沙:中南大学土木工程学院,2013:14-15.LIANG Fei.Mechanical characteristic research of CRTS I slab ballastless track[D].Changsha:Central South University.School of Civil Engineering,2013:14-15.
[16]任娟娟,徐家铎,田根源,等.客货共线无砟轨道轮轨力统计特征研究[J].工程力学,2018,35(2):239-248.REN Juanjuan,XU Jiaduo,TIAN Genyuan,et al.Field test and statistical characteristics of wheel-rail force for slab track with passenger and freight traffic[J].Engineering Mechanics,2018,35(2):239-248.
[17]赵华卫.客货共线无砟轨道荷载作用特征分析[D].成都:西南交通大学土木工程学院,2017:23-27.ZHAO Huawei.The train load characteristics for mixed passenger and freight railways with ballastless track[D].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2017:23-27.
[18]徐坤,赵志刚,任娟娟.CA砂浆伤损对板式无砟轨道结构受力影响分析[J].中国铁路,2013(9):68-72.XU Kun,ZHAO Zhigang,REN Juanjuan.The CA mortar damage influence on the mechanical behavior of prefabricated slab track[J].Railway of China,2013(9):68-72.
[19]谢露,赵春光,苏乾坤,等.轨道板与CA砂浆间拍打作用研究[J].铁道科学与工程学报,2017,14(4):675-681.XIE Lu,ZHAO Chunguang,SU Qiankun,et al.Study on the flap action between slab and CA mortar[J].Journal of Railway Science and Engineering,2017,14(4):675-681.
[20]邢俊,陈嵘,马晓川,等.地铁减振型无砟轨道CA砂浆应力匹配研究[J].铁道标准设计,2016,60(3):52-55,68.XING Jun,CHEN Rong,MA Xiaochuan,et al.Research on CAmortar stress matching vibration damping ballastless track in subway[J].Railway Standard Design,2016,60(3):52-55,68.
[21]刘永亮,孔祥明,邹炎,等.水泥沥青砂浆的静动态力学行为[J].铁道科学与工程学报,2009,6(3):1-7.LIU Yongliang,KONG Xiangming,ZOU Yan,et al.Static and dynamic mechanical behavior of cement asphalt mortars[J].Journal of Railway Science and Engineering,2009,6(3):1-7.
[2]王涛.高速铁路板式无碴轨道CA砂浆的研究与应用[D].武汉:武汉理工大学土木工程与建筑学院,2008:76-98.WANG Tao.Research and application on CA mortar in ballastless slab track of high speed railway[D].Wuhan:Wuhan University of Technology.School of Civil Engineering&Architecture,2008:76-98.
[3]刘哲.温度荷载对CRTS I型板式轨道CA砂浆充填层影响规律研究[D].成都:西南交通大学土木工程学院,2016:79-85.LIU Zhe.Effect of temperature load on CA mortar filling layer of CRTS I slab track[D].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2016:79-85.
[4]MONISMITH C L,SECOR K E.Viscoelastic behavior of asphalt concrete pavements[C]//Ann Arbor.First International Conference on the Structural Design of Asphalt Pavements.Michigan,USA:University of Michigan,1962:476-498.
[5]ZHANG W,DRESCHER A,NEWCOMB D E.Viscoelastic analysis of diametral compression of asphalt concrete[J].Journal of Engineering Mechanics,1997,123(6):596-603.
[6]ZHANG W,DRESCHER A,NEWCOMB D E.Viscoelastic behavior of asphalt concrete in diametral compression[J].Journal of Transportation Engineering,1997,123(6):495-502.
[7]LEE H J,KIM Y R.Viscoelastic continuum damage model of asphalt concrete with healing[J].Journal of Engineering Mechanics,1998,124(11):1224-1232.
[8]LEE H J,DANIEL J S,KIM Y R.Continuum damage mechanics-based fatigue model of asphalt concrete[J].Journal of Materials in Civil Engineering,2000,12(2):105-112.
[9]周志刚,钱国平,郑健龙.沥青混合料黏弹性参数测定方法的研究[J].交通科学与工程,2001,17(4):23-28.ZHOU Zhigang,QIAN Guoping,ZHENG Jianlong.Research on the measurement of viscoelastic parameters of asphalt mixture[J].Traffic Science and Engineering,2001,17(4):23-28.
[10]陈静云,周长红,王哲人.沥青混合料蠕变试验数据处理与黏弹性计算[J].东南大学学报(自然科学版),2007,37(6):1091-1095.CHEN Jingyun,ZHOU Changhong,WANG Zheren.Data processing and viscoelastic computation for creep test of asphalt mixture[J].Journal of Southeast University(Natural Science Edition),2007,37(6):1091-1095.
[11]李晓军,江丽华.沥青砂浆粘弹特性试验与模型参数分析[J].武汉理工大学学报,2011,33(3):82-86.LI Xiaojun,JIANG Lihua.Test and model parameter analysis of asphaltic sand with viscoelasticity[J].Journal of Wuhan University of Technology,2011,33(3):82-86.
[12]徐世法.表征沥青及沥青混合料高低温蠕变性能的流变学模型[J].力学与实践,1992,14(1):37-40.XU Shifa.Rheological model for asphalt mixture at high and low temperature characterizing creep properties[J].Mechanics in Engineering,1992,14(1):37-40.
[13]徐浩,王平,谢铠泽,等.水泥乳化沥青砂浆短期蠕变特性试验与模型参数分析[J].铁道学报,2015,37(9):114-118.XU Hao,WANG Ping,XIE Kaize,et al.Test and model parameter analysis of cement and emulsified asphalt mortar with short-term creep property[J].Journal of the China Railway Society,2015,37(9):114-118.
[14]徐庆元,李斌,周小林.高速列车作用下路基上板式无砟轨道动力系数[J].中南大学学报(自然科学版),2011,42(9):2831-2836.XU Qingyuan,LI Bin,ZHOU Xiaolin.Dynamic coefficient of slab track system on subgrade under high-speed trains[J].Journal of Central South University(Science and Technology),2011,42(9):2831-2836.
[15]梁飞.CRTS I型板式无砟轨道力学特性研究[D].长沙:中南大学土木工程学院,2013:14-15.LIANG Fei.Mechanical characteristic research of CRTS I slab ballastless track[D].Changsha:Central South University.School of Civil Engineering,2013:14-15.
[16]任娟娟,徐家铎,田根源,等.客货共线无砟轨道轮轨力统计特征研究[J].工程力学,2018,35(2):239-248.REN Juanjuan,XU Jiaduo,TIAN Genyuan,et al.Field test and statistical characteristics of wheel-rail force for slab track with passenger and freight traffic[J].Engineering Mechanics,2018,35(2):239-248.
[17]赵华卫.客货共线无砟轨道荷载作用特征分析[D].成都:西南交通大学土木工程学院,2017:23-27.ZHAO Huawei.The train load characteristics for mixed passenger and freight railways with ballastless track[D].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2017:23-27.
[18]徐坤,赵志刚,任娟娟.CA砂浆伤损对板式无砟轨道结构受力影响分析[J].中国铁路,2013(9):68-72.XU Kun,ZHAO Zhigang,REN Juanjuan.The CA mortar damage influence on the mechanical behavior of prefabricated slab track[J].Railway of China,2013(9):68-72.
[19]谢露,赵春光,苏乾坤,等.轨道板与CA砂浆间拍打作用研究[J].铁道科学与工程学报,2017,14(4):675-681.XIE Lu,ZHAO Chunguang,SU Qiankun,et al.Study on the flap action between slab and CA mortar[J].Journal of Railway Science and Engineering,2017,14(4):675-681.
[20]邢俊,陈嵘,马晓川,等.地铁减振型无砟轨道CA砂浆应力匹配研究[J].铁道标准设计,2016,60(3):52-55,68.XING Jun,CHEN Rong,MA Xiaochuan,et al.Research on CAmortar stress matching vibration damping ballastless track in subway[J].Railway Standard Design,2016,60(3):52-55,68.
[21]刘永亮,孔祥明,邹炎,等.水泥沥青砂浆的静动态力学行为[J].铁道科学与工程学报,2009,6(3):1-7.LIU Yongliang,KONG Xiangming,ZOU Yan,et al.Static and dynamic mechanical behavior of cement asphalt mortars[J].Journal of Railway Science and Engineering,2009,6(3):1-7.
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