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Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod

A technology of dynamic control and tie-rod arch bridges, applied in arch bridges, bridges, bridge maintenance, etc., can solve problems such as bridge deck damage, and achieve the effect of less engineering

Inactive Publication Date: 2003-03-12
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, although there are many accidents on arch bridges, there is still no mature technical report that meets the requirements of economic, safety and technological development for the handling of accidents and the handling of hidden dangers found in the inspection and maintenance of hanger arch bridges. Treatments include: partial reconstruction, bombing and reconstruction, replacement of a large number of supports and serious damage to the bridge deck, etc.

Method used

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  • Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod
  • Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod
  • Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod

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Embodiment

[0031] Embodiment, the following takes the replacement of the suspender of a mid-supporting suspender arch bridge as an example to specifically illustrate the structure of the device, and the values ​​of the control parameters of the device are as follows:

[0032] (a) Flange width b of welded I-beam f = 120mm, flange thickness h f1 = 12mm, h f2 =20mm, web height h w =310mm, web width b w =20mm;

[0033] (b) Outline dimensions of the tool suspender after tailor welding: length L, width W=280mm, height H=350mm.

[0034] (c) Dimension h of local pressure backing plate s ×ws =280×1650mm 2 .

[0035] (d) Parameters of stiffening steel ribs: number n=6, rib thickness ω=20mm, d 1 = d 2 =80mm, the total length of the rib is l=440mm.

[0036] (e) The size control parameters of the finish-rolled rebar are its diameter δ=32mm, and its length is 2.5m, 4.5m, 9m and so on.

[0037] (f) CY70 jack is selected for the hydraulic jack.

[0038] (h) The size of each load is m=120kN, ...

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Abstract

A dynamic control method for nondestructive replacing of the boom of tied arch bridge includes determining the length of new boom and controlling tension, bridge floor reaction and force transfer. A special hanger rod for said control procedure is also disclosed.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a dynamic control method for non-damage replacement of suspenders of a tied arch bridge. Background technique [0002] At present, more than 40,000 tied arch bridges have been built in our country. Due to the limitations of various historical, technical and economic conditions, most of the arch bridges have reached the stage of overhaul. Especially for the suspension rod arch bridge, because the suspension rod is the key component of force transmission, it has local static stability. Once a problem occurs, it will lead to chain damage of the structure, and eventually lead to the failure of most or the entire bridge deck system. The collapse of the Yibin South Gate Bridge, which has already occurred, is an example of this. [0003] On the other hand, the suspender is a prestressed component, and the accurate establishment of its stress state and the structu...

Claims

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Application Information

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IPC IPC(8): E01D4/00E01D22/00
Inventor 熊学玉张大照陈军
Owner TONGJI UNIV
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