Fracture mechanics measuring method for steel structure bridge life

A technology of fracture mechanics and measurement method, which is applied in the field of steel structure bridges, can solve problems such as inaccuracy and unreliability, and achieve the effect of ensuring accuracy and structural safety

Inactive Publication Date: 2006-11-15
上海市市政工程管理处
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to provide a fracture mechanics measurement method of the life of a steel structure bridge, the frac

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  • Fracture mechanics measuring method for steel structure bridge life
  • Fracture mechanics measuring method for steel structure bridge life
  • Fracture mechanics measuring method for steel structure bridge life

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Embodiment Construction

[0022] Such as figure 1 As shown, the fracture mechanics measurement method of the service life of a steel structure bridge in the present invention improves the accuracy of structural calculation by correcting the simulated data through the actual measurement data. The measurement method is divided into seven steps, which are respectively structural mechanics modeling 1. Mechanics model revision 2. Traffic load modeling 3. Traffic load correction 4. Ultrasonic flaw detection 5. Component fracture mechanics model modeling 6. Bridge structure technical state assessment 7.

[0023] The first step 1 is divided into four parts. The first is to investigate the bridge drawings and materials to determine all the structural details of the structure. The second is to simplify the structure. The third is to calculate the geometric characteristic parameters of the structure, and the fourth is to model.

[0024] The second step 2 is divided into six parts. The first is to preliminarily de...

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Abstract

The present invention relates to a method for measuring steel structure bridge life by utilizing fracture mechanics. It includes an ultrasonic inspection process of steel structure bridge member, and utilizes actually-measured data to correct analog data so as to raise accuracy of structural calculation. Said measurement method includes seven steps: structural mechanics modeling, mechanical model correction, traffic load modeling, traffic load correction, ultrasonic inspection, member fracture mechanics model modeling and bridge structure technical state judgment.

Description

technical field [0001] The invention relates to steel structure bridges, in particular to a method for measuring the fracture mechanics of steel structure bridges, in particular to a method for measuring the life of steel structure bridges for fracture mechanics. Background technique [0002] Surveys show that more than 80% of steel bridge failures are caused by fatigue and fracture. No serious fatigue accidents have occurred in bridges in our country so far, but the status quo of these bridges is not optimistic. A considerable number of steel bridges in my country were built before liberation. These steel bridges have suffered from long-term environmental corrosion and man-made damage. In recent years, affected by the continuous increase in traffic volume, there are generally serious hidden dangers of fatigue. A statistic in the autumn of 1994 showed that up to that time, there were 6,137 bridges with diseases in the state-owned railways in operation, accounting for 18.8% ...

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Application Information

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IPC IPC(8): G01N29/04G01M5/00
Inventor 袁文平陈惟珍商国平
Owner 上海市市政工程管理处
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