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