广深港客运专线连续梁拱后期变形预估研究

王存国; 黄纳新; 崔阳华

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铁道工程学报 ›› 2014, Vol. 31 ›› Issue (2) : 67-71.

桥梁工程

广深港客运专线连续梁拱后期变形预估研究

王存国，黄纳新，崔阳华

作者信息 +

Study by Prediction for Post Deformation of Continuous Beam-arch Bridge on Guangzhou-Shenzhen-Hongkong Passenger Dedicated Railway

WANG Cun-guo1, HUANG Na-xin2, CUI Yang-hua3

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文章历史 +

摘要

研究目的：无作轨道预应力混凝土梁受收缩徐变的影响，会产生后期徐变变形，引起桥梁的上拱和下挠，并且随着时间的延续这种变形增大，导致轨道的不平顺。研究成桥后不同的铺轨时间及改变成桥吊杆力对主梁徐变变形的影响，并考虑徐变及温度引起的主梁初始变形对该桥进行动力分析。

研究结论：对广深港客运专线跨骆岗涌水道(76+160+76)m连续梁拱模拟计算施工过程，分析得知：(1)铺轨时间对徐变变形影响较大，延长铺轨时间，主梁徐变变形变小；(2)成桥吊杆力越大，主梁边跨下挠值和中跨上拱值均变大；成桥吊杆力越小，主梁边跨下挠值和中跨上拱值均变小；(3)考虑徐变及温度引起的主梁初始变形对该桥进行动力分析，结果表明动力性能满足要求；(4)研究成果可应用于大跨度桥梁后期变形的控制。

Abstract

Research purposes: Due to the influence of concrete creep, the pre-stressed concrete beam of the ballastless will cause post deformation and lead to hogging and sagging, moreover, the deformation increases with time gradually, and results in non-smoothness of track. In this paper, research the influence on the creep deformation by changing laying time of track, dynamical analysis is made for the bridge by considering initial deformation result from creep and temperature.

Research conclusions: By bimulating the whole construction process of the beam-arch composite bridge with span arrangement (76+160+76)m on Guangzhou-Shenzhen-Hongkong passenger dedicated railway over liugangyong watercourse, conclude that:(1)The laying time of track have more influence on the creep deformation, when extend the laying time, the creep deformation of girder become smaller. (2)The more of suspender forces, the more of the sagging on side span and hogging on main span. The smaller of suspender forces, the smaller of the sagging on side span and hogging on main span. (3)Dynamical analysis is made for the bridge by considering initial deformation result from creep and temperature, the results show that the dynamical performance meets the requirement. (4) The research results can be used in control for post deformation of large span bridges.

导出引用

王存国, 黄纳新, 崔阳华. 广深港客运专线连续梁拱后期变形预估研究[J]. 铁道工程学报, 2014, 31(2): 67-71

WANG Cun-guo, HUANG Na-xin, CUI Yang-hua. Study by Prediction for Post Deformation of Continuous Beam-arch Bridge on Guangzhou-Shenzhen-Hongkong Passenger Dedicated Railway[J]. Journal of Railway Engineering Society, 2014, 31(2): 67-71

中图分类号： U442

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