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A bridge deflection early warning method and system

A bridge deflection and bridge technology, applied in the field of bridge structure early warning analysis, can solve the problems of unfavorable bridge structure safety, single deflection early warning threshold, poor real-time performance, etc., to achieve easy programmatic realization, extensive engineering application value, strong pertinence and real-time sexual effect

Active Publication Date: 2022-03-25
中铁桥隧技术有限公司
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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a bridge deflection early warning method and system to solve the problem that the deflection early warning threshold of the bridge health monitoring system in the prior art is relatively single, conservative, and has poor real-time performance, and errors in structural early warning information are prone to occur. Reporting or missing reporting is not conducive to ensuring the technical problems of bridge structure safety

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  • A bridge deflection early warning method and system
  • A bridge deflection early warning method and system
  • A bridge deflection early warning method and system

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with a case. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0057] The specific embodiment of the present invention provides a bridge deflection early warning method, comprising the following steps:

[0058] Step 1: Obtain deflection monitoring data, ambient temperature data, and vehicle crossing time information of the long-span railway bridge.

[0059] Set deflection monitoring data to def i , the ambient temperature monitoring data is temp i , where i is the data position, i.e. the i-th monitoring data, and i=1,2,...,Fs×86400×Num day , Fs is the sampling frequency of deflection monitoring data and ambient temperature monitoring data; 86400=60×60×24, is the total amount of data in one day; Num day For the number of days of data collection, analyze the sam...

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Abstract

The invention discloses a bridge deflection early warning method and system in the technical field of bridge structure early warning analysis, aiming to solve the problem that the deflection early warning threshold of the bridge health monitoring system in the prior art is relatively single, conservative, and has poor real-time performance, and misreporting of structural early warning information is prone to occur , False reporting, which is not conducive to ensuring the technical problems of bridge structure safety. The method comprises the following steps: obtaining deflection monitoring data, ambient temperature data, and vehicle crossing time information of the target bridge; dividing the deflection monitoring data into non-vehicle deflection data and passing deflection data based on the vehicle crossing time information, and calculating non-vehicle deflection data. The average value of the passing deflection data and the corresponding ambient temperature data in the preset period and the maximum value of the variation amplitude of each passing deflection data; the correlation analysis between the mean value of the non-passing deflection data and the corresponding ambient temperature data in the preset period ; Based on the correlation analysis results and the maximum value of the deflection change amplitude, the real-time deflection warning threshold of the target bridge is generated.

Description

technical field [0001] The invention relates to a bridge deflection early warning method and system, and belongs to the technical field of bridge structure early warning analysis. Background technique [0002] The deflection of the main beam of the bridge structure is an important part of the bridge design and an important manifestation of the structural rigidity. At the same time, it is also an important part of the bridge health monitoring system and a key indicator of the safety early warning assessment during the structural operation period. For the existing bridge health monitoring system, the commonly used deflection early warning threshold index usually adopts the combined value calculated by finite element under the most unfavorable working conditions, or the statistical value and normative value of the monitoring historical data. The deflection early warning threshold obtained by the above method is a static value, and the static early warning threshold setting is o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M5/00G06F30/13
CPCG01M5/0008G06F30/13
Inventor 刘兴旺陈斌赵大成戴新军刘华付一小吴来义王文弟董华能贾文文
Owner 中铁桥隧技术有限公司
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