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Method for monitoring seismic deformation of building curtain wall based on digital speckle marks

A technology of deformation monitoring and digital speckle, applied in measuring devices, instruments, optical devices, etc., to achieve high stability, low interference, and improved camera resolution

Inactive Publication Date: 2019-06-25
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

[0004] Aiming at the deficiencies in the current measurement methods for seismic load deformation of building curtain walls, the purpose of this invention is to provide a method for monitoring seismic deformation of building curtain walls based on digital speckle marks

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  • Method for monitoring seismic deformation of building curtain wall based on digital speckle marks
  • Method for monitoring seismic deformation of building curtain wall based on digital speckle marks
  • Method for monitoring seismic deformation of building curtain wall based on digital speckle marks

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Embodiment Construction

[0027] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0028] combine Figure 1~2 , the present invention comprises the following steps:

[0029] Step 1: If figure 1As shown, according to the different fixing methods of the curtain wall units in the actual project, the building curtain wall to be tested is assembled on the simulated specimen frame;

[0030] Step 2: Before the test starts, fix two industrial CCD cameras in front of the specimen to ensure that the distance between the two cameras and the test surface of the curtain wall to be tested is the same. The two cameras are required to take images from the left and right directions, each frame can capture the entire area of ​​the curtain wall unit, and the horizontal plane and symmetrical axis of the two cameras are perpendicular to the surface of the curtain wall. Connect two digital cameras to the computer and start the image acquisition so...

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Abstract

The invention provides a method for monitoring the seismic deformation of a building curtain wall based on digital speckle marks, and the method comprises the following basic steps: 1) fixing a test piece frame on an earthquake simulation vibration platform, assembling a to-be-detected curtain wall on the frame, and manually marking speckle patterns with random characteristics on the surface of the curtain wall; 2) erecting two industrial digital cameras to image speckle patterns on the surface of the test piece; 3) fitting artificial seismic waves according to the characteristics of a plannedconstruction site, carrying out graded loading for multiple times, and collecting speckle images at the same time; 4) performing three-dimensional digital image correlation matching calculation of the acquired digital image sequence in a computer to obtain full-field displacement and deformation information of the surface of the building curtain wall under the action of a seismic load. Through the digital speckle image marking and optical measurement method, the quantitative data of the full-field deformation of the curtain wall under the earthquake load effect is obtained, the measurement result is more accurate, the measurement steps are simpler, and the application range is wider.

Description

technical field [0001] The invention relates to a method for monitoring earthquake load deformation of a building curtain wall, in particular to a method for monitoring earthquake deformation of a building curtain wall based on digital speckle marks. Background technique [0002] As one of the types of external envelope structures of buildings, building curtain walls not only have the ability to modify the appearance, but also have certain structural bearing functions. In the actual application of engineering, there are many cases about the danger caused by the damage of building curtain wall by earthquake. When the earthquake load exceeds the limit of the bearing capacity of the curtain wall, the curtain wall will be deformed or even the curtain wall unit will be broken, and the safety accidents caused by this cannot be ignored. Based on the above reasons, monitoring the deformation of building curtain walls under seismic loads to evaluate the safety performance of specime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 原媛周易非刘文白孔戈高建卫
Owner SHANGHAI MARITIME UNIVERSITY
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