A bridge detection and evaluation method and equipment based on shock vibration

A technology of bridge detection and shock vibration, which is applied in shock test, vibration measurement in solids, measurement vibration, etc., can solve the problem of high monitoring cost, achieve high degree of automation, high efficiency, and reduce the number of sensors

Active Publication Date: 2017-04-19
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

However, this monitoring method usually requires a large number of sensors to be placed on the bridge, and a relatively expensive monitoring system is used, and the monitoring cost is high.

Method used

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  • A bridge detection and evaluation method and equipment based on shock vibration
  • A bridge detection and evaluation method and equipment based on shock vibration
  • A bridge detection and evaluation method and equipment based on shock vibration

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Experimental program
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Embodiment

[0124] The present invention will be further described below through specific examples, but the protection scope of the present invention should not be limited thereby.

[0125] Taking a single-span simply supported girder bridge as an example, as Figure 4 As shown, the span is 15.52m, and the entire bridge deck is 6.5m wide. It is two-way and two-lane, with 1.07m wide sidewalks left on both sides of the lane, and the distance between simply supported girders under the bridge deck is 2.18m. According to the present invention, the bridge is detected and evaluated for carrying capacity, and compared with the results of the traditional impact vibration test based on the overall structure of the bridge, the steps are as follows:

[0126] (1) Calculation preparation

[0127] According to the design load, the mid-span section of the bridge is determined to be the deflection control section, and the control deflection value of this section is 5.6mm. The entire bridge is then divid...

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Abstract

The invention discloses a bridge detection and evaluation method and equipment based on impact vibration. The method includes the steps of bridge reverse analysis based on non-reference point block impact and bridge forward analysis based on step-by-step impact loading. The steps of bridge reverse analysis of point-block impact are used to quickly find out the small and medium-sized bridges with seriously insufficient bearing capacity in the road network, and the steps of forward analysis of bridges based on step-by-step impact loading are used to evaluate the safety status of the investigation through reverse analysis. The actual carrying capacity of the bridge. Its equipment integrates testing and analysis functions, mainly including vehicle-mounted hydraulic impact devices, mobile hydraulic impact devices, signal transmission and acquisition systems, data analysis systems, etc. The equipment is used in reverse analysis and positive analysis of bridges. The invention realizes low-cost and high-efficiency detection and evaluation of all small and medium-sized bridges in the road network.

Description

technical field [0001] The invention relates to the field of bridge detection and evaluation, in particular to a bridge detection and evaluation method and equipment based on impact vibration. Background technique [0002] In the past hundred years, many countries have made brilliant achievements in the field of bridge construction. But at the same time, bridge damage and even collapse accidents occur frequently all over the world. These accidents have caused huge losses to people's lives and property, and caused extremely bad social impacts. Therefore, it is particularly important to detect and evaluate bridges in time. At present, there are two main problems in the detection and evaluation of bridges in use. [0003] On the one hand, small and medium-sized bridges account for a high proportion of the road network. Due to constraints such as capital and location, it is difficult for these bridges to be detected and evaluated in a timely manner using traditional methods, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/08
CPCG01M7/08G01H1/00G01M5/0008G01M5/0066G01H1/14
Inventor 张建夏琪张博郭双林
Owner SOUTHEAST UNIV
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