[1]孙璐,段雨芬,高培培.高速铁路板式无砟轨道的结构分析模型对比[J].东南大学学报(自然科学版),2013,43(5):938-943.[doi:10.3969/j.issn.1001-0505.2013.05.007]
 Sun Lu,Duan Yufen,Gao Peipei.Comparison of structural analysis models for slab ballastless track in high-speed railway[J].Journal of Southeast University (Natural Science Edition),2013,43(5):938-943.[doi:10.3969/j.issn.1001-0505.2013.05.007]
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高速铁路板式无砟轨道的结构分析模型对比()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
938-943
栏目:
交通运输工程
出版日期:
2013-09-20

文章信息/Info

Title:
Comparison of structural analysis models for slab ballastless track in high-speed railway
作者:
孙璐12段雨芬1高培培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 Lu12 Duan Yufen1 Gao Peipei1
1School of Transportation, Southeast University, Nanjing 210096, China
2Department of Civil Engineering, The Catholic University of America, Washington DC 20064, USA
关键词:
无砟轨道 弹性地基叠合梁理论 弹性地基梁-板理论 梁-体有限元理论
Keywords:
ballastless track composite beam theory on elastic foundation beam-slab theory on elastic foundation finite element theory of beam-solid
分类号:
U211.3
DOI:
10.3969/j.issn.1001-0505.2013.05.007
摘要:
为了对比弹性地基叠合梁理论、弹性地基梁-板理论和梁-体有限元理论在分析无砟轨道结构受力时的差别,基于这3种无砟轨道结构力学理论建立了无砟轨道结构分析模型,分析2种不同线下基础上CRTS Ⅱ和CRTS Ⅲ型板式无砟轨道结构的受力情况.结果表明:由于弹性地基叠合梁理论分析模型考虑的因素较少,计算所得结果与其他2种分析模型的计算结果相差较大,且与轨道板实际受力情况存在一定差别;弹性地基梁-板理论分析模型可较好地模拟轨道板和底座弯曲变形,计算结果比其他2种分析模型偏大约30%,设计偏于安全;梁-体有限元理论分析模型可真实反映无砟轨道结构的受力和变形,但分析模型相对复杂,对工程设计人员要求较高,一般用于无砟轨道结构的研发和设计验证.
Abstract:
To compare the difference of the composite beam theory on elastic foundation, the beam-slab theory on elastic foundation and the finite element theory of beam-solid in force analysis, structural analysis models for ballastless tracks were established based on these three theories of structural mechanics for ballastless track. The force conditions of two kinds of slab ballastless track, CRTS(Chinese railway track system)Ⅱ and CRTS Ⅲ, on different line infrastructure structures were calculated and analyzed. The results show that the calculation results of the model based on the composite beam theory on elastic foundation are dissimilar to those of other two models due to the lack of considerations and also different from the actual force conditions for ballastless track. The bending deformation of track plate and base can be simulated well by using the model based on the beam-slab theory on elastic foundation, and the calculation results are relatively larger by 30% than those by other two models, meaning the design is relatively safer. The force and deformation of the ballastless track structure can be faithfully reflected by using the model based on the finite element theory of beam-solid; however, this computational model is complex, and therefore professional engineers are needed. Generally it can be used for research and design verification for ballastless track structure.

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备注/Memo

备注/Memo:
作者简介: 孙璐(1972—),博士,教授,博士生导师,sunl@seu.edu.cn.
基金项目: 国家自然科学基金外国青年学者研究基金资助项目(51050110143,51250110075)、高速铁路基础研究联合基金重点资助项目(U1134206)、交通运输部西部交通建设科技资助项目(0901005C)、江苏省自然科学基金创新学者攀登计划资助项目(SBK200910046)、美国国家自然科学基金资助项目(CMMI-0408390,CMMI-0644552)、美国化学学会石油研究基金资助项目(PRF-44468-G9).
引文格式: 孙璐,段雨芬,高培培.高速铁路板式无砟轨道的结构分析模型对比[J].东南大学学报:自然科学版,2013,43(5):938-943. [doi:10.3969/j.issn.1001-0505.2013.05.007]
更新日期/Last Update: 2013-09-20