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Power monitoring method and system for bridge support damage

A bridge bearing and bearing technology, which is applied in measurement devices, complex mathematical operations, instruments, etc., can solve problems such as difficulty in bearing damage inspection, quantitative assessment, and difficulty in achieving, to ensure infrastructure safety and property safety, Simple structure and strong market competitiveness

Active Publication Date: 2021-08-13
扬州市市政建设处
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a dynamic monitoring method and system for bridge bearing damage, so as to solve the technical problems of the prior art that the bearing damage inspection is difficult, it is difficult to achieve accurate, timely and comprehensive monitoring, and it is difficult to quantitatively evaluate the damage

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  • Power monitoring method and system for bridge support damage
  • Power monitoring method and system for bridge support damage
  • Power monitoring method and system for bridge support damage

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specific example

[0051] The following is a specific example of using the above-mentioned dynamic monitoring method for bridge bearing damage to identify bearing damage, including:

[0052] Step 1, installation of the strain sensor:

[0053] Such as figure 2 As shown, the strain sensor 4 of the measuring point 1-12 is installed on the bottom surface of the beam plate 1 along the bridge direction by resin bonding or mechanical installation, and is installed at a position 1 / 5 span away from the corresponding support, that is, Among them, L is the net distance between the two supports under beam plate 1, and the gauge length of the strain sensor is 0.3m.

[0054] In this embodiment, it is assumed that working conditions 1, 2, and 3 correspond to 20%, 30%, and 50% of the support damage of No. 6 measuring point respectively, and No. 1 to No. 6 measuring points are selected as monitoring objects (No. 1-6 measuring points for the same horizontal direction).

[0055] Step 2: Obtain the typical dyn...

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Abstract

The invention provides a power monitoring method and system for bridge support damage, and belongs to the technical field of engineering monitoring. The method comprises the following steps: installing a strain sensor at a beam bottom near a bridge support; measuring the dynamic strain response under the vehicle-mounted action; calculating a first-order strain modal transverse distribution shape of the beam bottom according to Fourier transform; and judging whether the support is damaged or not according to the change of the shape of the strain mode, and quantifying the damage according to the change quantity of the shape of the strain mode. The bridge support damage monitoring is converted into beam bottom transverse dynamic strain monitoring, the damage can be accurately and timely identified, the damage degree can be quantified, a new method is provided for bridge support damage monitoring, and the structure is simple, the cost is low and the market competitiveness is high.

Description

technical field [0001] The invention belongs to the technical field of engineering monitoring, and in particular relates to a dynamic monitoring method and system for bridge support damage. Background technique [0002] The bearing is an important part of the bridge structure. Although its cost accounts for a relatively low proportion in the bridge construction cost, the role of the bearing in the bridge structure is irreplaceable. In addition to meeting the requirements of transferring loads, it also needs to meet the requirements of bridge beam deformation. In actual use, due to the influence of various factors, various diseases directly affect the service life and safety of the bridge. Common bearing diseases include: support void, support deviation, support overpressure, etc. At present, the inspection of bridge bearings is still mainly in the stage of appearance inspection, and there are few researches on the detection and research of the actual working performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/32G01B11/16G06F17/14
CPCG01B21/32G01B11/165G06F17/14Y02T90/00
Inventor 沈国根唐永圣余郁潘添张玉民赵策成晔鄂俊宇蔡腾騰
Owner 扬州市市政建设处
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