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Improved bridge deterioration assessment method based on previous-year technical state

A state-of-the-art, improved technology, applied in the field of improved bridge degradation assessment, 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., to achieve a good technical state, prolong The effect of service life

Active Publication Date: 2017-11-10
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

Method used

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  • Improved bridge deterioration assessment method based on previous-year technical state
  • Improved bridge deterioration assessment method based on previous-year technical state
  • Improved bridge deterioration assessment method based on previous-year technical state

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Embodiment Construction

[0043] Long-term tracking of the technical status of a concrete continuous girder bridge, the bridge is 75m in length, the superstructure is a 3×25m concrete cast-in-place continuous box girder, the girder is 1.5m high, and the width is 11.20m; the abutment is gravity abutment, pier It is a column type pier, and the pier and abutment foundations are all enlarged foundations; the bridge deck pavement layer in the bridge deck system is a cement concrete surface layer, the guardrail is made of steel pipe guardrails, and the bridge deck is equipped with drain holes; the bridge was completed in 1988 and opened to traffic in 2009. The age of the bridge was 22 years; according to the visual inspection results at the time of acceptance, the initial technical state score Dc of the bridge was determined to be 95 points; the bridge was inspected and evaluated 4 times during the 22 years, and 1988 was the initial bridge construction time , the detection and evaluation time were 1997, 2001,...

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Abstract

The invention discloses an improved bridge deterioration assessment method based on a previous-year technical state. Four parameters, including a technical state score during bridge buildup, the non-deterioration time of the technical state of the bridge, the statistic service life of the same type of bridges and bridge operation use time, are adopted to establish a bridge technical state deterioration process model capable of describing the bridge buildup to enter an operation period and simultaneously considering environment, loads and material characteristic changes. By use of the bridge technical state deterioration process model disclosed by the invention, bridge technical state assessment and prediction can be carried out, the bridge can be subjected to targeted detection, maintenance, repairing and reinforcement, the rationality of repairing, reinforcement and reformation scales is guaranteed, and the bridge keeps the good technical state so as to perform an important meaning for the safety of a bridge structure, sustainable operation and social and economic development.

Description

technical field [0001] The invention belongs to the fields of bridge detection, assessment and maintenance, in particular to an improved bridge degradation assessment method based on the technical state of the previous year. 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 unfavorable factors, material aging and structural damage will occur. The accumulation of this damage will lead to deterioration of structural performance and reduced reliability. Without maintenance and reinforcement Under the circumstances, its functions 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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 王龙林高建明刘世建杨雨厚陈齐风黎力韬于孟生桂涛锋张磊王海华郝天之谢军
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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