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Method for calculating fatigue life of orthotropic steel bridge deck slab

A technology for fatigue life and steel bridge decks, applied in strength characteristics, measuring devices, instruments, etc., can solve problems that have not considered the impact of environmental corrosion on fatigue life attenuation

Active Publication Date: 2016-06-22
JINLING INST OF TECH
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  • Claims
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Problems solved by technology

However, the above method only considers the influence of parameters such as vehicle loading and stress distribution on the fatigue life, and has not considered the influence of environmental corrosion on the fatigue life attenuation, which is insufficient for accurately evaluating the fatigue life of orthotropic steel bridge decks

Method used

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  • Method for calculating fatigue life of orthotropic steel bridge deck slab
  • Method for calculating fatigue life of orthotropic steel bridge deck slab
  • Method for calculating fatigue life of orthotropic steel bridge deck slab

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Embodiment Construction

[0063] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

[0064] see Figure 1 to Figure 7 , a method for calculating the fatigue life of an orthotropic steel bridge deck provided by the present invention includes:

[0065] S1: collecting nominal strain detection data at preset welding details and converting the nominal strain detection data into nominal strain samples;

[0066] S2: Bas...

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Abstract

The invention provides a method for calculating the fatigue life of an orthotropic steel bridge deck slab. The method comprises the following steps of collecting nominal strain monitoring data; performing calculation to obtain a nominal strain sample S; performing test to obtain an SCF (stain concentration factor); calculating the effective nominal strain amplitude SE<eq, i> and the effective hot spot stress amplitude SHE<eq, i> under the corrosion effect; calculating the fatigue resistance C(t) under the corrosion effect; calculating the fatigue damage D(t); calculating the fatigue life T. The method for calculating the fatigue life of the orthotropic steel bridge deck slab provided by the embodiment of the invention can be used for accurately calculating the fatigue life of the orthotropic steel bridge deck slab under the corrosion and vehicle-mounted effects.

Description

technical field [0001] The present application relates to a fatigue life calculation method, in particular to a calculation method for the fatigue life of an orthotropic steel bridge deck. Background technique [0002] As an important structure directly supporting the loads of trains and vehicles, the integrity of the steel bridge deck structure is an important guarantee for traffic safety. Previous studies have found that the orthotropic steel decks of some highway bridges have serious fatigue cracking under reciprocating alternating loads such as automobiles. Once fatigue cracking occurs, the supporting stiffness of the steel bridge deck will degrade, which will affect the smoothness of the driving structure and endanger the driving safety of railways and highways. Therefore, it is of great significance to carry out fatigue life assessment based on monitoring data for the structural safety of orthotropic steel bridge decks and even the overall bridge structure. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0005G01N2203/0073G01N2203/024G01N2203/0282G01N2203/0296
Inventor 宋永生丁幼亮李爱群
Owner JINLING INST OF TECH
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