西南交通大学学报 2008, 43(4) 434-440 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
徐变性能
试验
时随分析
设计建议
本文作者相关文章
薛伟辰
王巍
任廷柱
胡于明
PubMed
Article by XUE Weichen
Article by WANG Wei
Article by REN Tingzhu
Article by HU Yuming

准高速客运专线轨道梁的徐变性能

薛伟辰1, 王巍1, 任廷柱2, 胡于明1

1. 同济大学土木工程学院, 上海, 200092;
2. 上海市政工程设计研究总院, 上海, 200092

摘要

以秦沈客运专线轨道梁为原型,设计了3根1:5大尺度T型预应力混凝土模型梁,进行了为期3 a的徐变性能试验,重点考察了混凝土种类和预应力筋张拉方式对轨道梁徐变变形的影响.编制了基于龄期调整有效模量法的时随有限元全过程分析程序,实现了准高速客运专线轨道梁时随全过程分析.在此基础上,提出了综合考虑混凝土种类、预应力筋张拉方式及截面上下缘应力差等因素影响的准高速客运专线预应力混凝土轨道梁徐变变形的设计建议,计算结果与试验值吻合较好.

关键词 准高速客运专线   轨道梁   徐变性能   试验   时随分析   设计建议  

Creep Behavior of Track Girders on Quasi-high-speed Dedicated Passenger Railway

XUE Weichen1, WANG Wei1, REN Tingzhu2, HU Yuming 1

1. School of Civil Eng., Tongji University, Shanghai 200092, China;
2. Shanghai Municipal Eng.Design General Institute, Shanghai 200092, China

Abstract:

By taking track girders on Qinhuangdao-Shenyang quasi-high-speed dedicated passenger railway as prototypes,an experiment for about 3 a was conducted on three prestressed concrete model beams with a geometrical simulation ratio of 1 to 5 to probe into their creep behaviors.The research emphasizes the effects of types of concrete and tensioning methods of prestressed steel bar on creep deformation.Based on the age-adjusted effective modulus method(AEMM),a time-dependent finite element analysis program was developed,as a result,the time-dependent full-range analysis of the creep deformation of track girders can be made.A design suggestion was given to the creep deformation of track girders on a quasi-high-speed dedicated passenger railway by taking the types of concrete,the tensioning methods of prestressed steel bar and the difference between stresses in upper and lower fibers into account.The calculated results based on the suggestion agree well with the experimental data.

Keywords: quasi-high-speed dedicated passenger railway   track girder   creep behavior   experiment   time-dependent analysis   design suggestion  
收稿日期 2008-01-11 修回日期  网络版发布日期  
DOI:
基金项目:

建设部研究开发项目(04-2-026);上海市青年科技启明星(跟踪)计划资助项目(06QH14013)

通讯作者:
作者简介: 薛伟辰(1970- ),男,教授,博士,博士生导师,研究方向为现代预应力结构,电话:021-65980418,E-mail:xuewc@mail.tongji.edu.cn

参考文献:
[1] ACKER P,FRANZ-JOSEF U.Creep and shrinkage of concrete:Physical origins and practical measttrements[J].Nuclear Engineering and Design,2001,203(2):143-158.
[2] BAŽANT Z P.Prediction of concrete creep and shrinkage:Past,present and future[J].Nuclear Engineering and Design,2001,203(1):27-38.
[3] MCHENRY D.A new aspect of creep in concrete and its applications to design[J].Prec.American Society for Testing and Materials,1943,43:1 069-1 084.
[4] NEVILLE A M,DILGER W H,BROOKS J J.Creep of plain and structural concrete[M].New York:Construction Press,1983:1-361.
[5] BAŽANT Z P,PANULA L.Practical prediction of time-dependent deformations of concrete[J].Materials and Structures,1978,11(65):307-328.
[6] 劳远昌.劳远昌桥梁论文选集[M].北京:中国铁道出版社,1992:1-164.
[7] 周履,陈永春.收缩徐变[M].北京:中国铁道出版社,1994:1-55.
[8] 胡狄,陈政清.预应力混凝土桥梁收缩与徐变变形试验研究[J].土木工程学报,2003,36(8):79-85.HU Di,CHEN Zhengqin.Experimental research on the deformations for shrinkage and creep of beams in prestressed concrete bridges[J].China Civil Engineering Journal,2003,36(8):79-85.
[9] 乔健,陈良江.铁路预应力混凝土桥梁收缩徐变控制技术探索[J].铁道标准设计,2007(6):1-4.QIAO Jian,CHEN Liangjiang.Control technique exploration for shrinkage and creep of prestressed concrete railway bridge[J].Railway Standard Design,2007(6):1-4.
[10] 薛伟辰,王巍,任廷柱.准高速客运专线轨道梁施工阶段的徐变性能[J].西南交通大学学报,2005,40(6):138-143.XUE Weiehen,WANG Wei,REN Tingzhu.Creep behavior of quasi-high-speed dedicated passenger railway track girders during construetion[J].Journal of Southwest Jiaotong University,2005,40(6):138-143.
[11] BAZANT Z P.Prediction of concrete creep effect using age-adjusted effective modulus method[J].ACI Material Journal,1972,69(2):212-217.
[12] 段明德.预应力混凝土桥施工仿真分析徐变计算[J].铁道学报,1998,20(5):91-97.DUAN Mingde.Creep simulation calculation of PC bridge construction process[J].Journal of the China Railway Society,1998,20(5):91-97.
[13] 王巍.轨道交通预应力混凝土梁长期性能试验与理论研究[D].上海:同济大学土木工程学院,2006.
[14] American Concrete Institute.ACI318-05 Building code requirements for structural concrete and commentary[S].Farmington Hills:American Concrete Institute,2005.
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