Longitudinal stiffness control method and bridge of long-span concrete continuous girder bridge with high piers

Abstract

The invention relates to the technical field of high-pier large-span concrete bridges, in particular to a method for longitudinal stiffness control over a high-pier large-span concrete continuous girder bridge and a bridge. The method for longitudinal stiffness control comprises a step a) of establishing a linear bridge pier integrated calculation model; a step b) of applying an analog load; a step c) of analyzing beam track acting force and jointless track stress deformation laws; and a step d) of determining longitudinal rigidity limits of a fixed bridge pier and track treatment measures. Therefore, beam shape arrangement and fixed pier rigidity are determined, a problem that in the prior art, it is difficult to control longitudinal stiffness of the high-pier large-span continuous girder bridge is solved, and the blank of the high-pier large-span girder bridge in the field of longitudinal stiffness control is filled. Meanwhile, normative standards of longitudinal linear stiffness limits of the high-pier large-span concrete continuous girder bridge are established, a reference and a basis are provided for bridge design and construction, so the design cost is reduced, and the actually built bridge meets specific usage environments.

Description

technical field [0001] The invention relates to the technical field of high-pier long-span concrete bridges, in particular to a method for controlling the longitudinal stiffness of high-pier long-span concrete continuous beam bridges and the bridge. Background technique [0002] "Code for Design of High-Speed ​​Railways" (TB10621-2014) stipulates the limit value of the stiffness of the vertical horizontal line at the top of the pier of the concrete simply supported beam located in the fixed area of ​​the seamless line of the ballasted track. Regulation. The longitudinal stiffness of the pier mainly needs to consider the stability and strength requirements of the track of the seamless line. Under the condition of not taking special measures, the stability and strength of the track of the seamless line are the main factors controlling the longitudinal stiffness of the pier. [0003] For bridge piers and abutments, the basic specification for railway bridges and culverts only ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: in the prior art, it is difficult to effectively control and limit the longitudinal stiffness of the high-pier and long-span concrete continuous girder bridge, which leads to difficulties in the longitudinal stiffness of the bridge when building a high-pier and long-span concrete continuous girder bridge. To meet the requirements of vehicle-bridge coupling dynamic characteristics, as well as the stability and strength requirements of the seamless track on the bridge, a longitudinal stiffness control method and bridge of high-pier long-span concrete continuous girder bridges are provided. The longitudinal stiffness control method is established by establishing model, and apply simulated loads to the bridge, through the analysis of the beam-rail force and the force deformation law of the seamless line, the longitudinal stiffness limit of the fixed pier of the bridge is obtained, so as to further determine the beam layout and the stiffness of the fixed pier, and solve the problem It solves the problem that it is difficult to control the longitudinal stiffness of long-span continuous beam bridges with high piers in the prior art, and fills the gap in the field of longitudinal stiffness control of long-span concrete continuous beam bridges with high piers

Images