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

Abstract

The invention relates to the technical field of high-pier and large-span concrete bridges, in particular to a longitudinal rigidity control method for a high-pier and large-span concrete continuous rigid frame bridge and a bridge. The longitudinal rigidity control method includes the steps that a) a line pier integrated calculation model is established; b) the intensity and the stability of a rail under different working conditions are checked and calculated; c) different loads are applied to the continuous rigid frame bridge, and the influence conditions of the loads on force deformation of a seamless track are checked and calculated; d) the acting force and mutual displacement of a beam rail are analyzed; e) limiting values of the longitudinal rigidity of bridge fixed piers and rail processing measures are determined, and therefore the beam-shaped arrangement rigidity and the rigidity of the fixed piers are determined. The problem that the longitudinal rigidity of the high-pier and large-span continuous rigid frame bridge is difficult to control in the prior art is solved, the void of the high-pier and large-span concrete continuous rigid frame bridge in the longitudinal-rigidity control field is filled, a reference and a basis are provided for design and construction of the bridge, the design cycle is shortened accordingly, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of high-pier and long-span concrete bridges, in particular to a method for controlling the longitudinal stiffness of a high-pier and long-span concrete continuous rigid frame bridge 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 an...

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Problems solved by technology

[0006] The purpose of the present invention is to: in the prior art, it is difficult to effectively control and determine the limit range of the longitudinal stiffness of the high-pier long-span concrete continuous rigid-frame bridge, resulting in the existence of bridge The longitudinal stiffness is difficult to meet the requirements of vehicle-bridge coupling dynamic characteristics, and the stability and strength requirements of the seamless track on the bridge. A method for controlling the longitudinal stiffness of a high-pier long-span concrete continuous rigid frame bridge and a bridge are provided. The longitudinal stiffness The control method establishes a model, applies a simulated load to the bridge, and analyzes the force of the beam rail and the force and deformation of the seamless line to obtain the longitudinal stiffness limit of the fixed pier of the bridge, thereby further determining the beam layout and the fixed pier. It solves the problem that it is difficult to control the longitudinal stiffness of high-pier and large-span continuous rigid-frame bridges in the prior art, and fills the gap in the field of longitudinal stiffness control of high-pier and long-span concrete continuous rigid-frame bridges

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