Research and Comparative Evaluation on Influencing Factors of Concrete Frame Pier Structure Design
Based on a high-speed railway crossing the Luohe-Wugang Railway project,a number of influencing factors controlling the structural design index of concrete frame pier were systematically analyzed,and the solid beam and hollow beam were compared and evaluated in terms of the rationality,economy and safety of structural design.The main conclusions are as follows:the frame pier is sensitive to the influence of foundation stiffness,temperature and settlement,and the internal force of each section increases greatly with the increase of the influencing factors,except that the mid-span bending moment decreases with the increase of foundation stiffness.Under the influence of factors such as foundation stiffness,overall cooling and foundation settlement on the structure of the frame pier,the mechanical performance of the two beams is similar.The mechanical performance of the solid beam in the construction stage is better,and that of the hollow beam in the operation state is better.From the mechanical characteristics,the stiffness and strength design indexes of the two beams are similar,and the structural design is more reasonable.From the economic point of view,the main engineering cost of hollow beam is reduced by 4.3%,compared with the solid beam,it is more economical.From the perspective of safety,the hollow beam can effectively avoid the influence of cast-in-place construction on the existing operating railway,and the construction risk is lower than that of the solid beam.Finally,based on the above analysis,reasonable suggestions are given.
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