In-service bridge support damage diagnosis method based on vehicle braking effect

A technology of bridge bearings and diagnostic methods, applied in special data processing applications, instruments, calculations, etc., can solve problems such as large impact on the original structure, complicated installation of forced vibration equipment, and easy noise interference on measured data

Active Publication Date: 2019-12-06
HARBIN INST OF TECH
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Problems solved by technology

Excitation forms of this method include forced vibration and environmental vibration, but the installation of forced vibration equipment is complicated and ha

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  • In-service bridge support damage diagnosis method based on vehicle braking effect
  • In-service bridge support damage diagnosis method based on vehicle braking effect
  • In-service bridge support damage diagnosis method based on vehicle braking effect

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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying 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.

[0064] Combined with the manual Figure 1 to Figure 11 Illustrate the specific embodiment of the present invention, specifically as follows:

[0065] A damage diagnosis method for in-service bridge bearings based on the braking effect of vehicles, such as figure 1 As shown, the method includes the following steps:

[0066] Step 1, formulate the vehicle brake load test plan;

[0067] According to the inherent parameters of the bridge, the finite ele...

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Abstract

The invention discloses an in-service bridge support damage diagnosis method based on a vehicle braking effect, and belongs to the technical field of bridge support damage diagnosis. The objective ofthe invention is to solve the problems that an existing in-service bridge support damage diagnosis method cannot accurately perform structural damage positioning and is not high in measurement precision. According to the invention, the accurate bridge finite element model is established by using a model correction method, and a vehicle brake numerical simulation method is provided, so that a braketest scheme suitable for the bridge to be detected can be formulated more accurately. A proper wavelet basis function decomposition level is selected by utilizing a cost function, wavelet packet decomposition is performed on a free attenuation signal acquired at the pier top of the pier, and a damage index is constructed to diagnose the damage position and degree of the support. The method is simple to operate, economical and practical, has certain robustness and noise immunity, and does not greatly influence the bridge structure.

Description

technical field [0001] The invention relates to a method for diagnosing damage to in-service bridge supports based on the braking effect of vehicles, and belongs to the technical field of bridge support damage diagnosis. Background technique [0002] As an important component connecting the upper and lower structures of the bridge structure, the bridge bearing mainly undertakes the role of transferring load and adapting to structural displacement, so its working performance plays a vital role in the operating state of the bridge. There are many types of bridge bearings, and rubber bearings are the most common in practical applications. Due to the influence of various factors such as material properties, construction process and later operation, aging, voiding, bias and other diseases often occur, and then the structural service State adverse effects, and even lead to serious bridge accidents. Compared with bridge girder and substructure damage, bearing damage is often easil...

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Application Information

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