Design and Research of Zhengzhou-Xuchang City Railway Precast Segmental Assembling Bridges with Epoxy Resin Joints
Zhengzhou-Xuchang City Railway is an important intercity rail transit line in central plains city group.This line adopts precast segmental assembling technology.The paper is introduced the general situation of the project,main technical standards,bridge standard section design,section division,prestress design,shear keys design,section assembling construction process and other design schemes.According to the shortcomings of current numerical methods of epoxy resin joints,and the influence of epoxy resin joints on bridge structure is considered,and the composite element method of epoxy resin joints and concrete is proposed to simulate the epoxy resin joints of segmental beams,and the finite element model of the bridge is established,and the structural checking calculation is carried out.The calculation results show that the structural strength,stiffness,residual creep displacement of the main girder and the stress,strength and crack resistance of the epoxy resin joints meet the requirements of the code under various working conditions,which reflects the reasonable design scheme of the precast segmental assembling bridges with epoxy resin joints of Zhengzhou to Xuchang intercity railway,and can provide reference for the application of segmental bridge in city railway engineering.
segmental precast and assembling bridgesstructure designepoxy resin jointscomposite elementsnumerical calculation
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