Long-span pipeline suspension bridge wind resisting method

A pipeline bridge, long-span technology, applied in suspension bridges, bridges, bridge applications, etc., can solve problems such as uncontrollable linear internal resonance divergent wind-induced vibration

Active Publication Date: 2015-08-05
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology

If the wind cable is installed according to the suspension pipeline bridge with small span in the past, it can only solve the problem of lateral wind effect and deformation of the pipeline bridge, but the linear internal resonance, vortex induced resonance and wind and rain induced resonance that may occur in the cable system under the wind load Divergent wind-induced vibration such as vibration cannot be controlled

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  • Long-span pipeline suspension bridge wind resisting method
  • Long-span pipeline suspension bridge wind resisting method
  • Long-span pipeline suspension bridge wind resisting method

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Embodiment Construction

[0073] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0074] A wind resistance method for a long-span suspension pipeline bridge, comprising the following steps, such as figure 1 Shown:

[0075] Step 1, establishing a finite element model of a suspension pipeline bridge with interfering cables, which connect the main cables and wind cables of the suspension pipeline bridge, and are used to limit the amplitude of the main cables and wind cables and increase the vibration of the suspension pipeline bridge Structural damping; according to the size and tension of the cable system, preliminarily set the tension of the interference cable;

[0076] The pre...

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Abstract

The invention relates to a long-span pipeline suspension bridge wind resisting method and belongs to the field of pipeline bridge wind resisting. The method comprises the following steps of, firstly, establishing a finite element model of a pipeline suspension bridge with interference cables, wherein the interference cables connect the main cables and the wind cables of the pipeline suspension bridge, and preliminarily setting the tension of the interference cables; secondly, calculating the natural vibration frequency of the pipeline suspension bridge; thirdly, according to the natural vibration frequency, calculating the galloping stability and the flutter stability and performing calculation comparison, and if Vcg>=1.2Vd and Vcr>=1.2 mu fVd, executing the fourth step, or, returning to the first step; fourthly, according to the natural vibration frequency, calculating the vertical vortex-induced resonance amplitude and the torsional vortex-induced resonance amplitude and performing calculation comparison, and if A, executing the fifth step, or, return the first step; fifthly, by means of the steps above, continuously adjusting the tension of the interference cables and finally determining the tension of the interference cables. The long-span pipeline suspension bridge wind resisting method can improve the wind resisting safety of the long-span pipeline suspension bridge.

Description

technical field [0001] The invention relates to a wind resistance method for a long-span suspension pipeline bridge, which belongs to the wind resistance field of pipeline bridges. Background technique [0002] Suspension pipeline bridge is a special suspension bridge carrying natural gas pipelines, oil pipelines or water pipelines to cross natural or artificial obstacles such as rivers and canyons. Since the United States built the first suspension pipeline bridge on the Red River in 1926, many suspension pipeline bridges have been built around the world. Low damping. Since the deck width of pipeline bridges is much smaller than that of highway bridges and railway bridges, and its width-span ratio can reach 1 / 120, pipeline bridges are more sensitive to wind, so the influence of wind-induced vibration on pipeline bridges must be carefully considered in the design. If the wind cable is installed according to the suspension pipeline bridge with small span in the past, it can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D11/02E01D18/00
Inventor 李国辉铁明亮詹胜文左雷彬王丽马晓成杨春玲康坤坤
Owner BC P INC CHINA NAT PETROLEUM CORP
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