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| Study on Horizontal and Vertical Temperature Gradient of Ballastless Track on Curve Line |
| DAI Gong-lian, SU Hai-ting, YAN Bin |
| Central South University, Changsha,Hunan 410075, China |
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Abstract Research purposes:In order to get the time-varying rules of temperature field distribution in the track structure with superelevation and build the horizontal and vertical temperature gradient of ballastless track, a continuous observation of CRTS Ⅱ by using temperature sensors on curve segment of a passenger dedicated line was held.Research conclusions:(1) The temperature change of ballastless track between daytime and nighttime is big, the temperature changing value of surface was 24.7℃ in maximum, 19℃ in average. (2) The temperature changing value became small and the time of maximum temperature come late with the increase of distance to surface. (3) At the bottom of the track structure, the temperature changing value was 6.1℃ in maximum, 5.0℃ in average. (4) Fitting curve of vertical temperature gradient of longitudinally connected ballastless track on curve line can be exponential curve, and the curve sharp can match the distribution about the vertical temperature gradient of the code for design of bridge and culvert in China. (5) The horizontal temperature gradient of the CRTS Ⅱ longitudinally connected ballastless track included the track slab and support layer, temperature gradient of track slab could be fitted by using quadratic function, temperature gradient of support layer could be fitted by using piecewise linear function. (6) This study can provide guidance for the temperature load model in the design of high speed railway in central China.
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Received: 25 February 2014
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[1] 石现峰. 高速铁路无砟轨道结构的设计理论研究[D]. 北京:铁道部科学研究院, 2007.
Shi Xianfeng. Research on Design Theory of Ballastless Track Structure of High-speed Railway[D]. Beijing: China Academy of Railway Sciences, 2007.
[2] 邓德华,辛学忠.CRTS Ⅱ型板式无砟轨道砂浆充填层施工技术[M]. 北京: 中国铁道出版社, 2013.
Deng Dehua, Xin Xuezhong.The Construction Technique of CAM Filling on CRTS II Slab Ballastlesstrack Structure[M]. Beijing: China Railway Publishing House, 2013.
[3] 朱伯芳. 大体积混凝土温度应力与温度控制[M]. 北京:中国水利水电出版社, 2012.
Zhu Bofang. Mass Concrete Temperature Stress and Temperature Control[M]. Beijing: China Water Power Press, 2012.
[4] Xu Y L, Chen B, Ng C L, et al. Monitoring Temperature Effect on a long Suspension Bridge[J]. Structural Control ＆ Health Monitoring,2011( 6):632-653.
[5] 叶见曙,贾琳,钱培舒. 混凝土箱梁温度分布观测与研究[J]. 东南大学学报:自然科学版, 2002(5):788-793.
Ye Jianshu, Jia Lin, Qian Peishu. Observation and Research on Temperature Distribution in Concrete Box Girders [J]. Journal of Southeast University: Natural Science Edition,2002(5):788-793.
[6] 胡所亭. 高速铁路预应力混凝土箱梁竖向温度梯度效应研究 [D]. 北京:中国铁道科学研究院, 2008.
Hu Suoting.The Study on Vertical Temperature Gradient Effect of High-speed Railway Prestressed Concrete Box Girders[D]. Beijing:China Academy of Railway Sciences, 2008.
[7] 王继军,尤瑞林,王梦,等. 单元板式无砟轨道结构轨道板温度翘曲变形研究[J]. 中国铁道科学,2010(3):9-14.
Wang Jijun, You Ruilin, Wang Meng, etc. Research on the Slab Temperature Warping of the Unit Slab Track System[J]. China Railway Science, 2010(3):9-14.
[8] 凯尔别克 F. 刘兴法,译. 太阳辐射对桥梁结构的影响 [M]. 北京:中国铁道出版社,1981.
Kyle Buick F. The Effects of Solar Radiation on the Bridge Structures[M]. Beijing: China Railway Publishing House, 1981.
[9] Li D N, Maes M A, Dilger W H. Thermal Design Criteria for Deep Prestressed Concrete Girders Based on Data from Confederation Bridge[J]. Canadian Journal of Civil Engineering, 2004(5):813-825.
[10]TB 10002.1—2005,铁路桥涵设计基本规范[S].
TB 10002.1—2005,Fundamental Code for Design on Railway Bridge and Culvert[S]. |
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2014, Vol. 31 
