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Fretting test method and system for damage detection of civil engineering wall panels

A technology for civil engineering and structural damage, which is applied in the processing of detected response signals and the use of sonic/ultrasonic/infrasonic waves to analyze solids. Effect

Inactive Publication Date: 2016-04-13
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The accumulation of these damages will inevitably lead to the reduction of the service performance of the structure or the occurrence of structural damage.

Method used

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  • Fretting test method and system for damage detection of civil engineering wall panels
  • Fretting test method and system for damage detection of civil engineering wall panels
  • Fretting test method and system for damage detection of civil engineering wall panels

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Embodiment Construction

[0047] The embodiments of the present invention will be described in detail below. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0048] In this embodiment, the detection object is a brick wall structure with a thickness of about 0.75m. The masonry method is different along the height and the existing damage state is complicated. The overall damage location and damage degree of the structure are mainly detected. Such as figure 1 and figure 2 As shown, the specific implementation is as follows:

[0049]Firstly, multiple geophones (two components, perpendicular to the wall and parallel to the wall) are installed at different heights and different horizontal positions on the surface according to the characteristics of the structural masonry and the damage situati...

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Abstract

The invention discloses a micro-motion test method and system for structural damage detection of a civil engineering wallboard. The micro-motion test method comprises the following steps: a plurality of detectors are arranged on the surface of the wallboard according to the masonry, damage and other characteristics of a structure, and micro-motion signals are acquired through the detectors and recording equipment; the natural frequency and the natural mode of vibration of the structure are acquired through mathematical analysis; a finite element model (finite difference model) of the structure is built and perfected for eigenvalue computation so as to acquire the natural frequency, the natural mode of vibration and other dynamic response parameters; and the natural frequencies and the natural modes of vibration of a computation module and an actual measurement structure are compared to evaluate the break position and the break value (rigidity loss) of the response and position and quantify the damage. The invention further provides a corresponding system. The method and system have the advantages of simple equipment, high efficiency, no structural damage, strict transactional analysis, high precision of the analytic method, and no influence from the structural damage degree and complexity. Therefore, the invention provides a brand-new method for structural damage detection of the civil engineering.

Description

technical field [0001] The invention relates to a structural engineering detection, in particular to a non-destructive detection of a wall panel structure, and belongs to the field of structural engineering. Background technique [0002] In the complex service environment, the structure will be affected by various loads, natural weathering and various sudden external factors, and will face the problem of damage and damage accumulation. The accumulation of these damages will inevitably lead to the reduction of the service performance of the structure or the occurrence of structural damage. Therefore, in order to ensure the safety of the structure, it is necessary to establish a method for detecting and identifying structural damage, so as to detect the occurrence of structural damage, the location of the damage and the degree of damage as early as possible, and repair the structure in real time to avoid catastrophic accidents. In recent years, with the development of large-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/12G01N29/44
Inventor 车爱兰程成陈梦刘超冯少孔
Owner SHANGHAI JIAO TONG UNIV
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