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Longitudinal rigidity control method for high-pier and large-span concrete continuous rigid frame bridge and bridge

A technology of longitudinal stiffness and control method, applied in the direction of instrument, geometric CAD, calculation, etc., can solve the problems of difficult to control the longitudinal stiffness of high-pier and long-span continuous rigid frame bridges, and the longitudinal stiffness of bridges is difficult to meet the dynamic characteristics of vehicle-bridge coupling.

Active Publication Date: 2017-11-07
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Longitudinal rigidity control method for high-pier and large-span concrete continuous rigid frame bridge and bridge
  • Longitudinal rigidity control method for high-pier and large-span concrete continuous rigid frame bridge and bridge
  • Longitudinal rigidity control method for high-pier and large-span concrete continuous rigid frame bridge and bridge

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Experimental program
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Effect test

Embodiment 1

[0075] Such as Figure 26 As shown, the longitudinal stiffness control method of long-span concrete continuous rigid frame bridge with high piers includes the following steps:

[0076] a. Establish an integrated calculation model of line piers, and simplify the rigid frame piers to the way that fixed supports correspond to independent piers;

[0077] b. Check and calculate the strength and stability of the track under different working conditions;

[0078] c. Apply loads, apply different loads to the continuous rigid frame bridge, and check the influence of each load on the force deformation of the seamless line, the loads include wind loads, temperature loads and loads generated by foundation settlement;

[0079] d. Determine the stiffness limit, use the finite element method to analyze the beam-rail interaction force and mutual displacement, and perform numerical solutions to determine the longitudinal stiffness limit of the fixed pier;

[0080] e. Determine the beam layou...

Embodiment 2

[0100] High-pier long-span concrete continuous rigid-frame bridge, the continuous rigid-frame bridge is a ballasted track, the high-pier long-span concrete continuous rigid-frame bridge obtained according to the longitudinal stiffness control method described in Example 1, the continuous rigid-frame bridge is In the case of different nominal temperature spans, the longitudinal stiffness limit of the fixed pier and the track treatment measures meet the following table 1.

[0101] Table 1 The rigidity limit of the longitudinal line of the fixed pier of the ballasted track continuous rigid frame beam

[0102]

[0103]

[0104] The calculation results of the seamless track on ballast track rigid frame bridges under various working conditions are highly correlated with the value of the stiffness of the abutment. Value, so that the pier stiffness selection of rigid frame bridges with different spans is more rational and scientific, on the one hand, it can ensure the safety of th...

Embodiment 3

[0130] High-pier long-span concrete continuous rigid-frame bridge, the continuous rigid-frame bridge is ballastless track, the high-pier long-span concrete continuous rigid-frame bridge obtained according to the above-mentioned longitudinal stiffness control method, the continuous In the case of temperature span, the longitudinal stiffness limit of the fixed pier and the track treatment measures meet the following table 4.

[0131] Table 4 Limits of longitudinal line stiffness of fixed piers of ballastless track continuous rigid frame beams

[0132]

[0133]For ballastless track rigid frame bridges, the calculation results of the seamless track under various working conditions are highly correlated with the value of the abutment stiffness. Value, so that the pier stiffness selection of rigid frame bridges with different spans is more rational and scientific, on the one hand, it can ensure the safety of the line, and on the other hand, it can also save engineering investment...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23G06F2119/06
Inventor 鄢勇李锐陈思孝陈克坚袁明艾宗良陈天地李小珍王平
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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