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| The Deformation Research on the Long-span Curve Continuous Beam of Passenger Dedicated Line |
| KOU Yan-chun
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| China Railway Siyuan Survey and Design Group Co.Ltd, Wuhan, Hubei 430063, China |
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Abstract Abstract：Research purposes： The ratio of bridge in passenger dedicated line is increasing at present. The long-span continuous beams are widely used, with the characteristics of spanning capacity, big stiffness, less expansion joint and easy maintenance. The long-span curve continuous beams deformation is vital to track regularity and operation safety. Finite element analysis is realized basing on midas civil, including the deformation characteristics and temperature effect of long-span continuous beam.
Research conclusions：From the research on curve continuous beam of passenger dedicated railway with the span less than 130m and the curve radius according to the specification requirements, it is concluded that：（1）The vertical and longitudinal deformation of the curve beamis basically identical with the straight beam.（2）The lateral deformation is mainly generated by live loads (centrifugal force and swing force) and temperature force. This kind of deformation mainly presents as mid-span horizontal deformation and the value is much less than the one given by the code requirements.（3）The deformation along the direction of the fixed points′ chord line of every point of the beam is caused by the heating and cooling process of the bridge system, and every point′ sradial deformation around the fixed points is caused by the temperature difference of internal and external web plates, the lateral deformation is safe and reliable to track structure.（4）The research achievements can be used in the design of long-span curve continuous beam of passenger dedicated railway.
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(编辑梅志山) |
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