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Maintenance track structure for buffeting control of box main girder cable-stayed bridge

A track and girder technology, applied in bridge maintenance, bridges, bridge parts, etc., can solve the problems of decreased flutter stability and increased engineering cost, and achieve the best economic performance and improve flutter stability.

Inactive Publication Date: 2010-06-09
TONGJI UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The box-shaped main girder has the advantages of good aerodynamic performance, reliable structure, and strong durability, especially when the wind acts horizontally on the transverse axis of the main girder, it has good flutter stability; however, when the wind has a certain angle of attack, the box The flutter stability of the box-shaped girder structure will drop sharply. Therefore, under the premise of not greatly increasing the project cost, what kind of flutter control measures should be adopted to increase the critical wind speed of flutter and improve the stability of the box-shaped girder. urgent problems facing people

Method used

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  • Maintenance track structure for buffeting control of box main girder cable-stayed bridge
  • Maintenance track structure for buffeting control of box main girder cable-stayed bridge
  • Maintenance track structure for buffeting control of box main girder cable-stayed bridge

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Embodiment Construction

[0027] The present invention is described in detail below in conjunction with accompanying drawing and attached table.

[0028] The present invention is a maintenance track structure for flutter control of a box-shaped main girder cable-stayed bridge. 3. The maintenance track structure 3 is composed of a track 4 and a track support block 5; the track in the implementation is two I-beams with a height of 18-22 cm, and the I-beams are symmetrically arranged under the inclined webs on both sides of the main beam. The edge is connected with the inclined web through the support block, and the distance between the bottom end of the I-beam and the bottom plate of the main beam is 45-55 cm; the track of the ideal embodiment is two I-beams with a height of 20 cm, and the I-beam passes through the support The block is arranged symmetrically on the lower edge of the inclined web on both sides of the main beam. The distance between the bottom of the I-beam and the bottom plate of the main...

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Abstract

The invention relates to a maintenance track structure for controlling the vibration of box-shape main-beam cable-stayed bridge. The invention is characterized in that the lower edge of an incline webplate of the main beam is arranged with a maintenance track structure formed by a track and a track support block. The maintenance track under the incline web plate can increase 10.8% of vibration critical air speed, to significantly improve the vibratin stablility of box-shape main-beam cable-stayed bridge, with better economic property, non-increased cost, and the application for movable maintenance of maintenance vehicle on the main beam. The invention is an effective vibration control device.

Description

Technical field: [0001] The invention relates to the technical field of bridge engineering, in particular to a maintenance track structure used for flutter control of a box-shaped main girder cable-stayed bridge. Background technique: [0002] In the prior art, it is most common to use box girders for long-span cable-stayed bridges. The box-shaped main girder has the advantages of good aerodynamic performance, reliable structure, and strong durability, especially when the wind acts horizontally on the transverse axis of the main girder, it has good flutter stability; however, when the wind has a certain angle of attack, the box The flutter stability of the box-shaped girder structure will drop sharply. Therefore, under the premise of not greatly increasing the project cost, what kind of flutter control measures should be adopted to increase the critical wind speed of flutter and improve the stability of the box-shaped girder. problems that people face urgently. Invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D2/04E01D19/00E01D22/00
Inventor 葛耀君杨詠昕项海帆
Owner TONGJI UNIV
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