Test Method for Mobile Shock Vibration of Bridges Using Movable Equipment

A technology of shock vibration and mobile equipment, applied in vibration testing, impact testing, machine/structural component testing, etc., can solve problems that cannot directly support bridge maintenance and management decisions, and achieve convenient and fast testing and evaluation of small and medium bridges, high Economic benefits, convenient and quick test results

Active Publication Date: 2015-09-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing environmental vibration can only output basic modal parameters such as structural frequency, damping and formation, and these parameters cannot directly support bridge maintenance and management decisions

Method used

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  • Test Method for Mobile Shock Vibration of Bridges Using Movable Equipment
  • Test Method for Mobile Shock Vibration of Bridges Using Movable Equipment
  • Test Method for Mobile Shock Vibration of Bridges Using Movable Equipment

Examples

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Embodiment 1

[0057] Taking a typical small and medium-sized bridge as an example, its main structure is steel girders, and the bridge deck is concrete pavement. image 3 Shown is the shape of the bridge deck. According to the inventive method to be disclosed, the mobile impact vibration test is carried out on the bridge deck through the following steps: (1) divide the bridge deck into image 3 The three substructures are shown, it should be noted that there is no special restriction on the division method of the bridge deck substructure; (2) select image 3 The node 25 shown is a reference point, a wireless accelerometer is arranged at this reference point, and the acceleration response of this point is continuously tested during the whole test process; (3) Determine the sensor arrangement scheme of each substructure, for example, in the first substructure In the structural test, the impact force acts on nodes 2, 4 and 6 respectively, and the output points include 8 nodes such as 1 to 8. ...

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PUM

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Abstract

The invention discloses a mobile shock vibration test method for a bridge by using a mobile device. The method comprises the steps as follows: first, an integral test piece is divided into more than two sub structures, and a quantity of the sub structures is marked as Sn; second, any sub structure of the integral test piece is provided with a wireless accelerometer and a set point serves as a reference point; third, each sub structure undergoes an impact test, an impact force and an acceleration response of each sub block at each point are recorded, and the acceleration response of the reference point is recorded in test processes of all sub structures; and fourth, test data of each sub structure are fused through the reference point. The test method of the invention requires only one common test point, and does not require observing the common boundary point of each sub block, so that the test method is quicker and more convenient, greatly reduces the time and cost of the bridge testing, and possesses the potential of creating higher economic benefits.

Description

technical field [0001] The invention relates to the fields of dynamic testing and safety evaluation of medium and small bridges in civil engineering and traffic engineering. It is proposed to disclose a mobile small and medium-sized bridge vibration test method and its special equipment that only needs one reference point, which can realize deformation prediction and rapid bearing capacity evaluation of small and medium-sized bridges. Background technique [0002] According to the survey data in 2009, the total number of bridges in my country is 594,600, of which 552,800 are small and medium-sized bridges, among which the number of various sick bridges is close to 100,000, and the number of dangerous bridges is 20,000. Compared with the large and extra-large bridges across rivers and seas, the large number of small and medium-sized bridges on national and provincial arterial roads and county and township roads has limited investment in capital and manpower, resulting in a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02G01M7/08
Inventor 张建郭双林李攀杰
Owner SOUTHEAST UNIV
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