[1]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.[doi:10.3969/j.issn.1001-0505.2014.02.032]
　Sun Lu,Duan Yufen,Zhao Lei,et al.Dynamic response analysis of CRTSⅡ ballastless track structure of high-speed railway[J].Journal of Southeast University (Natural Science Edition),2014,44(2):406-412.[doi:10.3969/j.issn.1001-0505.2014.02.032]
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高速铁路CRTSⅡ型板式无砟轨道结构动力特性分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第2期
页码:
406-412
栏目:
交通运输工程
出版日期:
2014-03-20

文章信息/Info

Title:
Dynamic response analysis of CRTSⅡ ballastless track structure of high-speed railway
作者:
孙璐1; 2; 段雨芬1; 赵磊1; 张永明1
1东南大学交通学院, 南京 210096; 2美国天主教大学土木工程系, 华盛顿 20064
Author(s):
Sun Lu1; 2;  Duan Yufen1;  Zhao Lei1;  Zhang Yongming1
1School of Transportation, Southeast University, Nanjing 210096, China
2Department of Civil Engineering, The Catholic University of America, Washington DC 20064, USA
关键词:
高速铁路;  CRTSⅡ型板式无砟轨道结构;  模态分析;  动力特性
Keywords:
high-speed railway;  CRTSⅡ ballastless track structure;  modal analysis;  dynamic characteristics
分类号:
U213.242
DOI:
10.3969/j.issn.1001-0505.2014.02.032
摘要:
为了分析京沪高速铁路CRTSⅡ型板式无砟轨道结构的动力响应,通过建立无砟轨道结构-下部基础结构动力有限元分析模型,得到了结构前10阶模态和不同列车速度下无砟轨道结构的动力特性.分析结果表明:桥梁上CRTSⅡ型板式无砟轨道结构的自振频率都比规范的限值大,说明桥梁有足够的刚度保证列车行驶的安全性和舒适性;桥梁上板式无砟轨道结构的前10阶振型中大部分振型表现为横向扭转,桥梁结构横向刚度相对较小,在实际的高速铁路桥梁结构中应注意桥梁的横向稳定性;无砟轨道结构各个构件的竖向位移、竖向加速度、板底水平拉应力及CA砂浆层竖向压应力均随列车速度的增大而逐渐增大;线下基础结构顶面竖向压应力存在转折变化点.
Abstract:
In order to research the dynamic response of the ballastless track slab structure of Beijing-Shanghai High-Speed Railway,China railway track slab(CRTS)Ⅱstructure with the supporting part is built based on the composite solid element theory, obtaining first ten modals and dynamic characteristics at different speeds. The analysis results show that the natural frequency of CRTSⅡ slab track on the bridge is larger than the specification limit, and, therefore, the bridge has sufficient rigidity to ensure the safety and comfort; as the first ten modals of the slab track on the bridge structure is lateral torsion, the lateral stiffness of the bridge structure is relatively low, so the lateral stability of the bridge should be noted; the vertical displacement, vertical acceleration, and bottom horizontal tensile stress in each component of the ballastless track structure(BTS)and the vertical stress of the concrete asphalt(CA)mortar layer are gradually increased with the increasing speed of the trains; the vertical stress of the top surface under line infrastructure has a turning point.

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备注/Memo

备注/Memo:
收稿日期: 2013-09-12.
作者简介: 孙璐(1972—),男,博士,教授,博士生导师,workingworking123@163.com.
基金项目: 国家自然科学基金重点资助项目(U1134206)、国家自然科学基金外国青年学者研究基金资助项目(51250110075,513111130)、交通运输部西部资助项目(0901005C)、江苏省自然科学基金创新学者攀登计划资助项目(SBK200910046)、美国国家科学基金总统奖资助项目(CMMI-0408390)、美国国家科学基金资助项目(CMMI-0644552).
引用本文: 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. [doi:10.3969/j.issn.1001-0505.2014.02.032]
更新日期/Last Update: 2014-03-20