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Stay cable with porous hollow housing for cable stayed bridge

A cable-stayed bridge and cable-stayed technology, applied in the field of stay cables, can solve problems such as increasing the galloping vibration of the dry cable, and achieve the effects of reducing static wind load, avoiding wind-rain-induced vibration, and restraining wind-rain-induced vibration

Inactive Publication Date: 2015-01-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, recent studies have shown that such a stay cable with dimples on the surface will have a large dry cable gallop in windy and rainy weather; in some cases, the dimples on the surface of the cable will increase the tension Possibility of dry cable galloping

Method used

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  • Stay cable with porous hollow housing for cable stayed bridge
  • Stay cable with porous hollow housing for cable stayed bridge
  • Stay cable with porous hollow housing for cable stayed bridge

Examples

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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 to Figure 4 As shown, a cable-stayed cable-stayed bridge with a perforated hollow cover is composed of a high-strength galvanized steel wire 2, a surface sheath 3, a spiral rib 4 and a perforated cover 5 from the inside to the outside; The high-strength galvanized steel wire 2 is fixed in the surface sheath 3. The surface sheath 3 and the perforated cover 5 are concentric circular tubes. There is a certain gap between the perforated cover 5 and the surface sheath 3. The gap space At least one helical rib 4 coaxial with the circular pipe is arranged inside, and the inner and outer helical edges of the helical rib 4 are respectively consolidated with the pipe wall of the surface sheath 3 and the perforated outer cover 5 .

[0023] The rotation direction of the helical ribs 4 is left helical or right helical, the number o...

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Abstract

The invention relates to a stay cable with a porous hollow housing for a cable stayed bridge. The stay cable consists of a high-strength galvanized steel wire, a surface sheath, a spiral fin and a porous housing from inside to outside respectively, wherein the high-strength galvanized steel wire is fixedly arranged in the surface sheath; the surface sheath and the porous housing are concentric circular tubes; a certain gap is remained between the porous housing and the surface sheath; at least one spiral rib which is coaxial with the circular tubes is arranged in the space of the gap; the internal and external spiral edges of the spiral rib are fixedly adhered to the tube walls of the surface sheath and the porous housing respectively. According to the stay cable, the regularity of karman vortex shedding of the cable and the regularities of axial flow and axial vortex can be broken by the axial porous housing of the cable, and the relevancy of pneumatic acting force of the stay cable in the axial direction of the stay cable is reduced, so that the conditions for occurrence of dry cable galloping are damaged.

Description

technical field [0001] The invention relates to a cable-stayed cable with a hollow outer cover for a cable-stayed bridge. Background technique [0002] With the development of modern bridges towards longer spans and lighter weight, cable-stayed bridges have become one of the most commonly used bridge structures to achieve this goal due to their own characteristics, and have been widely used around the world. As the main load-bearing components of cable-stayed bridges, the quality of stay cables directly determines the life and safety of cable-stayed bridges. Due to the special working environment of cable-stayed bridges, the vibration caused by strong wind is one of the main reasons for the damage of cable-stayed cables. The cost of replacing stay cables damaged by vibration accounts for about 1 / 4 to 1 / 3 of the cost of the whole bridge. Therefore, it is of great engineering significance to develop control measures that can effectively suppress wind-induced vibration of stay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16E01D11/04
CPCD07B5/006D07B2401/202D07B2501/203E01D19/16
Inventor 杜晓庆张利平李俊军曾静丽
Owner SHANGHAI UNIV
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