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

A technology of longitudinal stiffness and control method, applied in bridges, bridge construction, bridge parts, etc., can solve the problems that the longitudinal stiffness of bridges is difficult to meet the coupled dynamic characteristics of vehicles and bridges, and it is difficult to control the longitudinal stiffness of high-pier and long-span continuous girder bridges. The effect of rationalizing the calculation process, ensuring accuracy and convenience

Active Publication Date: 2018-12-28
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Description
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  • Application Information

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

Method used

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

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Embodiment 1

[0068] According to the comparison of codes and pier line stiffness checking calculations, it can be seen that the longitudinal stiffness of long-span bridges with high piers is mainly controlled by seamless lines. In recent years, with the rapid development of railway construction and the advancement of seamless line technology on bridges, bridges The proportion of the line is gradually increasing, and the line inevitably needs to cross special areas such as traffic arteries, steep canyons, and wide rivers. In order to meet the requirements of the line across these areas, a large number of high-pier and long-span continuous beam bridges have appeared Due to the particularity of the structural characteristics of these bridges (long link length, weak stiffness, and large temperature span), the structural differences between adjacent bridge structures (such as differences in beam stiffness, beam material differences, and piers stiffness differences, etc.) and the complexity of na...

Embodiment 2

[0152] High-pier long-span concrete continuous girder bridge, the continuous girder bridge is a ballasted track, the high-pier long-span concrete continuous girder bridge obtained according to the longitudinal stiffness control method described in Example 1, the continuous girder bridge is in different temperature spans In this case, the longitudinal stiffness limit of the fixed pier and the track treatment measures shall meet Table 1:

[0153] Table 1 The rigidity limit of the longitudinal line of the fixed pier of the ballasted track continuous beam

[0154]

[0155] Listed in the table are the line stiffnesses required for single-line bridges, and double-line bridges are twice the values ​​listed in the table.

[0156] Continuous girder bridges are different from simply supported girder bridges. As the length of continuous girders increases, the expansion force of the rails, the rapid relative displacement of the girders and rails, and the value of the cracks in the rail...

Embodiment 3

[0178] High-pier long-span concrete continuous girder bridge, the continuous girder bridge is a ballastless track, the high-pier long-span concrete continuous girder bridge obtained according to the above-mentioned longitudinal stiffness control method, the continuous girder bridge under different temperature span conditions, The longitudinal stiffness limit of the fixed pier and the treatment measures for the track meet Table 5.

[0179] Table 5 Limits of longitudinal line stiffness of ballastless track continuous beam fixed pier

[0180]

[0181]

[0182] Listed in Table 5 are the required line stiffnesses for single-line bridges, and double-line bridges are twice the values ​​listed in Table 5.

[0183] Compared with the ballasted track, the ballastless track has better stability, the fastener resistance is larger, and there is no problem of track stability degradation under the action of braking force. According to the latest "Code for the Design of Seamless Railway...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D1/00E01D19/00
CPCE01D1/00E01D19/00
Inventor 陈思孝鄢勇李锐陈克坚艾宗良袁明陈天地李小珍王平
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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