Degradation assessment method for technical state of bridge based on initial state of finished bridge

A technique of technical state and initial state, which is applied in the field of bridge technical state degradation assessment based on the initial state of the bridge, can solve the problems of insufficient accuracy and credibility of the assessment work, large deviation between the estimation of the degradation model and the actual value, etc. Achieve good technical status and prolong service life

Active Publication Date: 2017-08-15
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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Problems solved by technology

[0012] The above model can be used not only for newly built bridges, but also for old bridges that have been in service for many years. However, the estimation of the degradation model deviates greatly from the actual value, which makes the accuracy and reliability of the evaluation work not high enough

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  • Degradation assessment method for technical state of bridge based on initial state of finished bridge
  • Degradation assessment method for technical state of bridge based on initial state of finished bridge
  • Degradation assessment method for technical state of bridge based on initial state of finished bridge

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Embodiment Construction

[0044] Long-term follow-up of the technical status of a reinforced concrete hollow slab bridge, the bridge is 60m long, the superstructure is a 3×20m concrete hollow slab, and 11 beams are arranged horizontally, the beam height is 0.90m, and the width is 1.00m; the abutment is Gravity stone masonry abutments, gravity stone masonry piers, pier and abutment foundations are all enlarged foundations; the bridge deck pavement layer is cement concrete surface layer, and the guardrail adopts the anti-collision wall type; the bridge was completed in 1994 and 2016 The age of the bridge is 23 years. According to the data when the bridge was built, it was determined that the initial technical state score Dc of the bridge was 95 points. During the 23 years, the bridge was inspected and evaluated 4 times. 1994 was the initial bridge construction time. In 2003, 2007, 2011 and 2016, the technical status scoring results D(1)=Dc=95, D(10)=85, D(14)=81, D(18)=76, D(23) =71, the evaluation time...

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Abstract

The invention discloses a degradation assessment method for a technical state of a bridge based on an initial state of the finished bridge. By adopting four parameters including a technical state score during bridge finishing, non-degradation time of the technical state of the bridge, statistical service life of a same-type bridge and bridge operation time, a model capable of describing a bridge technical state degradation process when the bridge is continuously changed with environments, loads, material properties and the like after being finished to enter an operation period is built. The bridge technical state degradation model is used to perform bridge technical state assessment and prediction, so that the bridge can be pointedly detected, maintained, repaired and reinforced, the reasonability of repair, reinforcement and reconstruction scales is ensured, the bridge is enabled to keep good technical state, and the service life of the bridge is effectively prolonged.

Description

technical field [0001] The invention belongs to the fields of bridge detection, evaluation and maintenance, and in particular relates to a bridge technical state degradation evaluation method based on the initial state of the bridge. Background technique [0002] Bridges are all going through the process of construction, service, functional degradation, and scrapping. During use, as time goes by, under the action of internal or external or natural adverse factors, material aging and structural damage will occur. The accumulation of this damage will lead to structural performance degradation and reduced reliability. In the case of reinforcement, its function will inevitably decline at an accelerated rate. Since bridges are composed of basic materials such as steel and concrete, after statistical analysis, the deterioration of new and in-service bridges has similar laws. It is very important to study and predict the reliability and status of bridges in the future. In order t...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 黎力韬王龙林陈齐风王海华林子安于孟生余舟黄佳栋郝天之
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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