Full-field non-contact building curtain wall wind pressure deformation monitoring method

Abstract

The invention provides a full-field non-contact building curtain wall wind pressure deformation monitoring method. The method comprises the steps that (1) random speckle marking is performed on the surface of a building curtain wall, and an air pressure control device is connected to the surface of the building curtain wall; (2) two industrial digital cameras are erected to perform digital specklepattern imaging on the surface of the curtain wall; (3) the air pressure control device is started to pressurize the curtain wall step by step, and meanwhile digital speckle images of the surface ofthe curtain wall are recorded; and (4) a three-dimensional digital image correlation matching algorithm is utilized to perform correlation matching on the collected digital image sequence, and full-field displacement information of the surface of the building curtain wall under the action of a wind load is calculated. According to the method, by means of recording the digital images, the full-field deformation information of the surface of the building curtain wall can be quantitatively acquired through non-contact measurement, the limitation of a traditional displacement meter measurement method is overcome, deformation monitoring of the building curtain wall is simpler and more flexible, the applicable spatial range is wider, precision and stability are higher, and actual popularizationis easy.

Description

technical field [0001] The invention relates to a wind pressure deformation monitoring method of a building curtain wall, in particular to a full-field non-contact wind pressure deformation monitoring method of a building curtain wall. Background technique [0002] As a kind of external wall maintenance structure, building curtain wall has become the "optimal choice" in large super high-rise buildings because of its beautiful energy saving, mature technology and easy maintenance. However, during the service process of the building curtain wall, the deformation of the curtain wall caused by the wind load has become one of the main factors affecting its service performance. When the wind load acts on the surface of the building curtain wall and the deformation caused by it exceeds the bearing limit of the curtain wall, it is likely to cause the curtain wall to rupture and cause a safety accident. Therefore, accurate and comprehensive monitoring of the wind pressure deformatio...

AI Technical Summary

Problems solved by technology

This method reflects the ability of the building curtain wall to bear the wind pressure load to a certain extent, but it also has the following limitations: 1) The traditional displacement meter measurement method describes the overall wind pressure resistance performance of the curtain wall through the displacement information of several limited measurement points In fact, the wind pressure performance of the curtain wall depends on the weakest position in the structure, and the displacement measurement points selected in advance may not be able to fully capture this part of the information; 2) As the form of modern building curtain walls becomes more and more The structure is more and more complex, and it is becoming more and more difficult to determine the location of the traditional displacement gauge. It is even difficult to directly arrange the displacement gauge in some structures, so that the displacement gauge measurement method cannot be directly measured; 3) The rapid speed of large super high-rise buildings With the development, the requirements for spatial span and spatial resolution of building curtain wall deformation monitoring have been further improved, and the scope and accuracy of curtain wall wind pressure deformation monitoring have become larger and higher.

If the traditional measurement method based on displacement meters is adopted, it is undoubtedly necessary to arrange a large number of displacement meters, which is almost difficult to achieve, and the performance of this method in terms of spatial resolution is also difficult to meet the requirements of local deformation measurement accuracy

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