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A method of bridge foundation erosion identification based on vehicle braking impact

A vehicle braking, bridge-based technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large measurement errors, and achieve the effects of improving accuracy, low cost, and small test workload

Active Publication Date: 2018-12-14
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problem that the sensors used in the existing multiple pier scouring monitoring methods are easily interfered by hydrological conditions and cause large measurement errors, and the installation is limited by the actual environment and climate, a new method is proposed. Scour recognition method for bridge foundation based on vehicle braking impact

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  • A method of bridge foundation erosion identification based on vehicle braking impact
  • A method of bridge foundation erosion identification based on vehicle braking impact
  • A method of bridge foundation erosion identification based on vehicle braking impact

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiment is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] Combined with the manual Figure 1 to Figure 7 Illustrate the specific embodiment of the present invention, specifically as follows:

[0044] The flow chart of the bridge foundation scour identification method based on the impact of vehicle braking is as follows: figure 1 As shown, the specific process is as follows:

[0045] (1) Formulate the bridge dynamic test plan;

[0046] First, establish a benchmark model; establish the overall finite element model ...

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Abstract

The invention relates to a method of bridge foundation erosion identification based on vehicle braking impact, belonging to the technical field of bridge pile foundation erosion damage identification.The invention aims at solving the problem that the sensor is easily disturbed by hydrological conditions when placed under water in the existing bridge pier scour monitoring method, and the measurement error is relatively large, and the sensor is liable to be limited by actual environment and climate when installed. The method comprises the steps of: with brake force of the vehicle being used asan exciting source, exciting the acceleration response of the pier in the direction of the bridge, and arranging an acceleration sensor at the top of each pier, taking the acceleration signal collected from the pier top as the analysis signal, obtaining the wavelet packet energy variance of the intact bridge structure and the damaged bridge structure by wavelet packet decomposition and reconstruction, and comparing the wavelet packet energy variance change rate of the intact bridge structure and the damaged bridge structure to determine the damage location and degree. The structural damage identification excitation mode of the invention increases the excitation amplitude, improves the processing precision, and has the advantages of strong real-time performance, simplicity and easy operation, etc.

Description

technical field [0001] The invention relates to a method for quantitatively analyzing and evaluating the health state of bridge pile foundations, especially the buried depth of pile foundations, and belongs to the technical field of scour damage identification of bridge pile foundations. Background technique [0002] As an important component supporting the superstructure, the working status of the bridge foundation directly affects the safe operation of the entire bridge. Pile foundations are widely used in bridge construction, but long-term water erosion will take away the river bed material around the bridge substructure (especially the pile foundation), resulting in a reduction in the bearing capacity of the bridge pile foundation, which seriously affects the stability of the bridge substructure. Severe cases may even cause bridge water damage accidents, resulting in heavy losses and adverse social impacts. Therefore, it is of great significance to conduct regular healt...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/13
Inventor 李岩杨婷婷孙航高庆飞林雪琦
Owner HARBIN INST OF TECH
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