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A Calculation Method for Wind Cable Alignment of Suspension Pipeline Bridge

A calculation method and pipeline bridge technology, applied in the direction of instruments, geometric CAD, electrical digital data processing, etc., can solve the problems such as the gap between the wind cable line shape and the parabola, not in the same plane, and the wind cable system is difficult to install, so as to improve the calculation accuracy , The effect of improving the calculation accuracy

Active Publication Date: 2021-11-02
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology

However, the actual line shape of the wind cable segment located between the cables is a space catenary, not only is there a large gap between the line shape of the whole wind cable and the parabola, but also the wind cable and the wind cable are not in the same plane
Only using the spatial parabola theory to calculate the wind cable line shape and unstressed length will not only cause a large gap between the real line shape and the design line shape, but will even cause the problem that the wind cable system is difficult or even impossible to install

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  • A Calculation Method for Wind Cable Alignment of Suspension Pipeline Bridge

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[0045] 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 accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] The present invention makes the following assumptions to the wind cable cable system of the space cable-shaped suspension bridge:

[0047] (1) The wind cables and wind stay cables are ideal flexible cables with small strains, and their materials satisfy Hooke's law, and the Poisson effect is ignored.

[0048] (2) When the bridge is completed, the wind cables only incline along the direction of the transverse bridge, and the inclination error of the wind cables in the longitudinal direction of the bridge during the construction process is ignored.

[0049] A method for calculating the wind c...

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Abstract

The invention relates to a method for calculating the wind cable alignment of a suspension pipeline bridge, which belongs to the field of crossover design of oil and gas pipelines. value, calculate the linear coordinates of the wind cable and the stress-free length of each cable segment; use the influence matrix method to correct the three-dimensional component force at the beginning of the wind cable, and recalculate the linear coordinates of the wind cable and the stress-free length of each cable segment. The invention solves the previous problems of imprecise design, too many assumptions, and too large calculation error, and adopts the method to carry out design and calculation, which can greatly improve the calculation accuracy of the wind cable line shape and the stress-free length of the suspension pipeline bridge.

Description

technical field [0001] The invention relates to a method for calculating the wind cable line shape of a suspension pipeline bridge, which belongs to the field of spanning design of oil and gas pipelines. Background technique [0002] Pipeline suspension bridges are generally composed of main cables, suspension cables, wind cables, wind stay cables, stabilizing cables (conjugate cables), stiffening beams, cable towers and anchorages. Since its main purpose is to transport oil, natural gas or water, supports are usually set up on the bridge deck for erecting pipelines, and a simple maintenance path is set up to facilitate the construction and subsequent maintenance of pipelines. Pipeline suspension bridges have a small width-span ratio, low structural rigidity, and are sensitive to wind resistance. Generally, wind cable systems need to be installed. The mechanical characteristics of the pipeline suspension bridge are: the load acting on the bridge deck and the vertical load c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F119/14
CPCG06F30/13G06F2119/14
Inventor 左雷彬胡川川杨威詹胜文刘思萌陈晓晖李国辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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