Calculation method and device for suspension bridge fatigue life

A fatigue life and calculation method technology, applied in suspension bridges, bridges, bridge construction, etc., can solve the problems of fatigue life calculation of suspension bridge suspension cables, and achieve the effect of avoiding calculation deviation, accurate calculation results and high cost performance.

Active Publication Date: 2021-04-20
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Abstract
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Problems solved by technology

However, at present, the data obtained by the dynamic weighing system has not been used to calculate the fatigue life of suspension bridge suspension cables at home and abroad.

Method used

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  • Calculation method and device for suspension bridge fatigue life
  • Calculation method and device for suspension bridge fatigue life
  • Calculation method and device for suspension bridge fatigue life

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] figure 1 A schematic flow chart of the calculation method for the fatigue life of the suspension bridge suspension cable provided by the embodiment of the present invention, such as figure 1 shown, including:

[0050] S101. Collect vehicle load data of the suspension bridge for a preset number of days, so as to reconstruct the daily ...

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Abstract

An embodiment of the present invention provides a method and device for calculating the fatigue life of suspension bridge cables, wherein the method includes collecting vehicle load data of the suspension bridge for a preset number of days to reconstruct the daily vehicle load flow of the suspension bridge; establishing a three-dimensional finite element model of the suspension bridge , calculate the internal force of the sling under the action of dead load based on the three-dimensional finite element model, and obtain the continuous influence surface of the internal force of the sling; load the reconstructed daily vehicle load flow on the continuous influence surface of the internal force of the sling, and obtain the daily influence surface of the sling The internal force time history curve generated by the vehicle load; the daily fatigue damage of the sling is obtained according to the internal force time history curve and the internal force under the constant load, and the fatigue life is determined according to the daily fatigue damage of the sling within the preset number of days. The embodiment of the present invention avoids the calculation deviation caused by the randomness of the short-term vehicle load data.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, and more specifically, to a calculation method and a device for fatigue life of suspension bridge suspension cables. Background technique [0002] The suspension cable is the key stress-bearing component of the suspension bridge, and the stress state of the suspension cable is directly related to the overall safety status and performance of the suspension bridge. However, due to the continuous increase in the number of heavy-duty vehicles on the road, the vehicle load level borne by the bridge structure is also increasing, which makes the fatigue problem of the bridge structure increasingly prominent. The test results of real bridges at home and abroad show that even if the design service life is far from being reached, some suspension bridge suspension cables have the phenomenon of steel wire fatigue fracture. Therefore, a scientific and reasonable calculation and analysis method for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23E01D19/16G06F111/10
CPCE01D11/02E01D19/16
Inventor 邓扬李爱群吴宜峰李雨航
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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