Method and a device for optimizing safety monitoring indexes of a concrete beam bridge

A technology for safety monitoring and concrete beams, which is applied to pattern recognition in signals, character and pattern recognition, instruments, etc. It can solve the problems of weakening the safety indication performance of the neutral axis, insufficient measurement accuracy of uncertainties, etc., and achieve improved stability. and accuracy, the effect of reduced interference

Inactive Publication Date: 2019-04-05
TONGJI UNIV
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Problems solved by technology

At low strain amplitudes, the uncertainty of various parameters and the lack of measurement accuracy will significantly weaken the safety indication performance of the neutral axis

Method used

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  • Method and a device for optimizing safety monitoring indexes of a concrete beam bridge
  • Method and a device for optimizing safety monitoring indexes of a concrete beam bridge
  • Method and a device for optimizing safety monitoring indexes of a concrete beam bridge

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0051] The application discloses a method for optimizing the safety index of the neutral axis of the beam bridge cross section. The method combines modern signal processing technology and statistical evaluation method to form a scheme for optimizing the performance of the safety index of the neutral axis. By introducing multi-resolution wavelet analysis and peak picking algorithm of strain signal, the interference of environmental noise and temperature change can be effectively reduced, and the accuracy of neutral axis index can be improved. Combined with the relevant theory of sta...

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Abstract

The invention relates to a concrete beam bridge safety monitoring index optimization method and device, and the method comprises the steps: S1, receiving a collected bridge structure strain signal, and carrying out the analysis and reconstruction of the strain signal through employing multi-resolution wavelet analysis, so as to eliminate the environment temperature and data noise; S2, on the basisof the set threshold interval, extracting a peak value and a valley value, exceeding the threshold interval, caused by the same live load to form a binary array, and obtaining a strain response amplitude caused by single vehicle excitation; And S3, calculating a corresponding neutral axis height according to strain response amplitudes at different heights of the monitored cross section, carryingout data integration on the neutral axis safety index within one day, and calculating a statistical property including probability distribution as an optimized safety monitoring index. Compared with the prior art, the method adopts a statistical tool to analyze and evaluate the statistical characteristics of the neutral axis distribution, and is more suitable for long-term monitoring of the bridgestructure.

Description

technical field [0001] The invention relates to the field of structural safety monitoring, in particular to a method and device for optimizing safety monitoring indicators of concrete girder bridges. Background technique [0002] Beam bridges occupy an unshakable main position in highway bridges. With the increase of bridge service life, a large number of newly built bridges are gradually entering the "aging" stage, and various forms of structural degradation inevitably occur. It can be seen that it is urgent to carry out research on safety monitoring of girder bridges under operating conditions. By selecting reasonable and common safety indicators for long-term monitoring, the structural degradation process of the target bridge can be effectively grasped, so as to judge the safety reserve of the target bridge and carry out preventive maintenance. [0003] The neutral axis is considered as a potential safety indicator that can be used for long-term monitoring of bridges. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06Q10/06
CPCG06Q10/06393G06F2218/06G06F2218/10
Inventor 夏烨王鹏孙利民
Owner TONGJI UNIV
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