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Method for calculating stress concentration coefficient of rusted suspender

A technology of stress concentration factor and calculation method, which is applied in the field of bridge suspender corrosion, can solve unfavorable problems such as bridge suspender corrosion, complexity, and time-consuming, and achieve the effects of avoiding time-consuming and complicated, easy acquisition, and high promotion value

Active Publication Date: 2021-10-15
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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Problems solved by technology

However, the traditional calculation of the stress concentration factor is mostly through the finite element method, theoretical derivation or test measurement, which is too time-consuming and complicated, which is not conducive to the subsequent research on the corrosion of bridge suspenders

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  • Method for calculating stress concentration coefficient of rusted suspender
  • Method for calculating stress concentration coefficient of rusted suspender
  • Method for calculating stress concentration coefficient of rusted suspender

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] 1. Establish a rusted boom model

[0018] 1. Selection of the shape of the corrosion pit of the model: the existing research has summarized the shape of the corrosion pit into open type and deep narrow type by observing the shape of the corrosion pit of steel bars. Among them, the shape of the open corrosion pit is divided into spherical crown type, hemispherical shape, etc., so this kind of corrosion pit can be simplified as a spherical corrosion pit. Another deep and narrow corrosion pit shape includes conical, truncated cone, etc., and researchers (such as Pidaparti, etc.) have found that as the corrosion time increases, the conical corrosion pit will gradually become a hemispherical corrosion pit. Therefore, based on the above research conclusions, the present invention chooses to establish a suspender with a spherical corrosion pit for expe...

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Abstract

The invention discloses a method for calculating a stress concentration coefficient of a rusted suspender, which comprises the following steps: considering the radius r of a corrosion pit on the suspender, the depth d of the corrosion pit and a function relation between the diameter D of the suspender and the corrosion suspender stress concentration coefficient K, establishing a model, calculating to obtain multiple groups of stress concentration data based on the model, and fitting the data to obtain the stress concentration coefficient of the corrosion suspender, and further obtaining an expression of the stress concentration coefficient K of the rusted suspender. The expression can replace a finite element method to solve the stress concentration coefficient of the suspender with the rusted ball pit, calculation of the stress concentration coefficient of the suspender with the rusted ball pit is simplified, a rapid method is provided for the stress concentration coefficient of the suspender with the rusted ball pit in subsequent engineering, the problem that calculation of the finite element method is time-consuming and complex is solved, and the time cost is saved.

Description

technical field [0001] The invention relates to the field of bridge suspender corrosion, in particular to a calculation method for the stress concentration factor of a corroded suspender. Background technique [0002] As a key component of bridges, suspenders play an important role in various types of bridges. In tied arch bridges and suspension bridges, suspenders are even more important stress components. It can be said that the safety of suspenders is related to the entire bridge security. However, as the service time increases, due to the joint action of the external environment and fatigue loads, the boom often has corrosion problems, and the appearance of corrosion will weaken the cross section of the boom, reduce the fatigue performance of the boom, reduce the fatigue life, and seriously threaten Boom safety. Therefore, in order to better judge the risk of corrosion on the weakening of the suspender section, the stress concentration factor is introduced as an import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/14
Inventor 王华张子墨杨涛王龙林王希瑞于孟生彭曦蒋国富黄凯楠杨雨厚何清
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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