均匀降温下CRTSII型高速铁路轨道板温度应力分析

doi:10.12068/j.issn.1005-3026.2017.11.029

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (11): 1664-1668.DOI: 10.12068/j.issn.1005-3026.2017.11.029

均匀降温下CRTSII型高速铁路轨道板温度应力分析

赵磊^1,2，孙璐^1,3，孙伟¹，赵国堂⁴

(1. 东南大学交通学院，江苏南京210096; 2. 北京市市政工程设计研究总院有限公司，北京100082; 3. 美国天主教大学土木工程系，华盛顿20064; 4. 中国铁路总公司，北京100844)

收稿日期:2016-03-08 修回日期:2016-03-08 出版日期:2017-11-15 发布日期:2017-11-13
通讯作者: 赵磊
作者简介:赵磊(1981-)，男，河北安国人，东南大学博士研究生.
基金资助:
国家自然科学基金重点资助项目(U1134206).

Thermal Stress Analysis of CRTSII Track-Slab of High-Speed Railway Under a Uniform Cooling Condition

ZHAO Lei¹， SUN Lu^2,3， SUN Wei²， ZHAO Guo-tang⁴

1. School of Transportation， Southeast University， Nanjing 210096， China; 2. Beijing General Municipal Engineering Design & Research Institute Co.， Ltd.， Beijing 100082， China; 3. Department of Civil Engineering， Catholic University of America， Washington D C 20064， USA; 4. China Railway Corporation， Beijing 100844. China.

Received:2016-03-08 Revised:2016-03-08 Online:2017-11-15 Published:2017-11-13
Contact: ZHAO Lei
About author:-
Supported by:
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摘要/Abstract

摘要： 根据无砟轨道板钢轨-轨道板-钢筋滑移线性本构关系，建立了均匀降温作用下纵连式轨道板温度应力计算模型.应用拉普拉斯变换方法求解平衡微分方程，得到钢筋和混凝土应力、位移的解析表达式，分析配筋率、扣件扣压力和板底摩擦力等参数对裂缝间距及轨道板内力、位移的影响.最后以京沪高铁CRTSⅡ无砟轨道板为例，计算30℃降温条件下的开裂间距，轨道板内力、位移随裂缝长度的分布规律.研究结果表明，解析表达式可以准确地分析轨道板的温度应力，为无砟轨道板设计提供理论依据.

关键词: 高速铁路, 轨道结构, 线性滑移本构关系, 温度应力计算模型, 拉普拉斯变换

Abstract: A new calculation model of track-slab of high speed railway about temperature stress was established based on rail—track-slab—steel bar linear slip constitutive equations， and the analytic expression were derived using Laplace transform method.The influence of the parameters including reinforcement ratio， fastener buckle pressure and plate friction on the crack spacing and the changing characteristics of internal force and displacement of the track-slab under uniform cooling were studied with analytic expression. Finally， taking the CRTSII track plate under 30℃ cooling conditions with the respect to the Beijing—Shanghai high-speed railway as an example， the stress and displacement distribution of slab with the crack length and reinforcement ratio were calculated. It can be concluded that temperature stress of CRTSII track-slab can be analyzed effectively using the method and provides theoretical basis of design for ballastless track structure.

Key words: high speed railway, track structure, linear slip constitutive equations, calculation model for temperature stress, Laplace transform

中图分类号:

U213.242

赵磊，孙璐，孙伟，赵国堂. 均匀降温下CRTSII型高速铁路轨道板温度应力分析[J]. 东北大学学报:自然科学版, 2017, 38(11): 1664-1668.

ZHAO Lei， SUN Lu， SUN Wei， ZHAO Guo-tang. Thermal Stress Analysis of CRTSII Track-Slab of High-Speed Railway Under a Uniform Cooling Condition[J]. Journal of Northeastern University Natural Science, 2017, 38(11): 1664-1668.

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均匀降温下CRTSII型高速铁路轨道板温度应力分析

Thermal Stress Analysis of CRTSII Track-Slab of High-Speed Railway Under a Uniform Cooling Condition

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