Evaluation method for rigidity of longitudinal horizontal line of arch pier top of steel truss arch bridge for deck-arch railway

A steel truss arch bridge, horizontal line technology, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., to achieve the effect of real and reliable calculation, reasonable analysis and calculation, and cost avoidance

Active Publication Date: 2020-08-14
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art of the lack of a reasonable evaluation method for the longitudinal horizontal line stiffness of the pier abutment top of the large-span upward-supporting railway steel truss arch bridge, and to provide an arch-upper pier of the upward-supporting railway steel truss arch bridge Judgment method for the stiffness of the vertical horizontal line of the roof

Method used

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  • Evaluation method for rigidity of longitudinal horizontal line of arch pier top of steel truss arch bridge for deck-arch railway
  • Evaluation method for rigidity of longitudinal horizontal line of arch pier top of steel truss arch bridge for deck-arch railway
  • Evaluation method for rigidity of longitudinal horizontal line of arch pier top of steel truss arch bridge for deck-arch railway

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Embodiment

[0024] For example, take the above-supported railway steel truss arch bridge with a main span of 490m as an example, such as figure 1 As shown, the steel truss arch circle 3 has a rise height of 109.5m and a rise-span ratio of 1 / 4.475. Its cross-section adopts four trusses, and a total of 13 arch piers 1 are arranged symmetrically. The arch piers 1 are portal-type steel piers. The beam 2 is a steel box girder, and the junction pier 4 is a portal-type rigid frame pier structure. The span of the arched beam 2 is 14×37.2m. The railway includes four lines, which are two main lines and two arrival and departure lines.

[0025] According to the design requirements of the current "Code for Design of Railway Bridges and Culverts", the rigidity limits of the vertical horizontal line of the pier top of conventional bridges (simply supported girders, continuous girders, continuous steel structures, and tied arch bridges, etc.) are shown in Table 1. The limit value of the minimum horizont...

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Abstract

The invention discloses an evaluation method for rigidity of a longitudinal horizontal line of an arch pier top of a steel truss arch bridge for a deck-arch railway. When the rigidity of the longitudinal horizontal line of the pier top is analyzed, the influence of the arch pier is considered; the influence of the steel truss arch ring and an on-arch beam on an on-arch pier is also considered; establishing a full-bridge finite element model for the steel truss arch bridge, the influence of the longitudinal rigidity and the structural size of the steel truss arch ring, the on-arch pier and theon-arch beam on the rigidity of the longitudinal horizontal line of the pier top of the on-arch pier is comprehensively considered. The conventional method only simulates rigidity of a single pier andmakes judgments based on beam-arch analysis.The method is reasonable in analysis, the calculation process can be simplified, the stress condition of the seamless steel railway under the action of longitudinal force such as braking force does not need to be analyzed, the longitudinal rigidity condition of the whole structure can be comprehensively reflected, the rigidity is real and reliable, thestructural size does not need to be increased blindly, and extra cost increase is avoided.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a method for judging the stiffness of the longitudinal horizontal line of the pier top of the arch of an overhead railway steel truss arch bridge. Background technique [0002] my country's railways use seamless lines across sections. In order to ensure the stability and safety of the seamless lines on the bridge, it is necessary to check and calculate the additional stress of the rails due to temperature changes, train braking (starting), etc.; at the same time, in order to ensure the bridge structure For the safety of the stress, the additional longitudinal braking force of the corresponding pier top should also be checked and calculated. A large number of existing experimental research results show that: under the action of train braking, the longitudinal braking additional force and distribution on the top of the bridge pier are not only affected by parameters such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/23
CPCG06F30/13G06F30/23
Inventor 陈克坚余浪易大伟艾智能徐建华许志艳何庭国黄毅游励晖许敏陈运泽
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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