西南交通大学学报 2005, 40(6) 740-745 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
准高速客运专线
轨道梁
施工阶段徐变变形
试验
时随分析
本文作者相关文章
薛伟辰
王 巍
任廷柱
PubMed
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准高速客运专线轨道梁施工阶段的徐变性能

薛伟辰;王 巍;任廷柱

同济大学土木工程学院,上海200092; 上海市政工程设计研究院,上海200092

摘要

以秦沈客运专线轨道梁为原型,设计了4根1∶5大尺度T型试验梁,对其在施工过程中的徐变变形进行 了试验研究,重点考察了混凝土种类及预应力筋张拉方式等因素对轨道梁徐变变形的影响.用大型商用软件 Sofistik对试验梁在施工阶段的徐变变形进行了时随全过程分析,计算结果与试验值的差值在10%以内.在此基 础上,提出了考虑混凝土种类、预应力筋张拉方式以及钢筋配筋率的徐变变形设计建议.研究结果为准高速客运 专线轨道梁设计和徐变变形控制提供了试验依据.

关键词 准高速客运专线   轨道梁   施工阶段徐变变形   试验   时随分析   

Creep Behavior ofQuasi-high-speed Dedicated Passenger Railway Track G irders during Construction

XUEWei-chen;WANG Wei;RENTing-zhu

School ofCivilEng., TongjiUniversity, Shanghai 200092, China; ShanghaiMunicipalEng. Design Institute, Shanghai 200092, China

Abstract:

Four large scaleT-beamswith a geometricalproportion of1∶5 weremade to simulate track girders of theQinhuangdao-Shenyang dedicated passenger railway. Their creep deformations during the construction were investigated experimentally. The research laid emphasis upon the effects of types of concrete and tensioningmeasures ofprestressed steelbaron the creep deformation. Moreover, program Sofistikwas used in the time-dependent full-range analysis of theT-beams during the construction, the errorbetween calculated and experimental results being less than 10%. Based on the above research, design suggestions taking the typesofconcrete, the tensioningmeasuresofprestressed steelbarand the rate ofreinforcement into accountwere given. The research results are useful to the design ofdedicated passenger railway track girders and the effective control of creep deformation.

Keywords: track girder   creep deformation during construction   experiment   time-dependent analysis    quasi-high-speed dedicated passenger railway  
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1.薛伟辰;王 巍;任廷柱;胡于明 .准高速客运专线轨道梁的徐变性能 [J]. 西南交通大学学报, 2008,43(4): 434-440

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