Determining Structural Damage of Stone Curtain Walls by Dynamic Method

Dry hanging stone curtain wall is widely used in the building envelopes, but it was of ten deemed as a safety risk. The damage of the back anchorage structure may result in the urban disaster accident due to the falling down of the tone panel. There is no yet effective detection method because the d...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-11, Vol.678 (1), p.12026
Main Authors: Zheng, Dezhi, Bao, Yiwang, Liu, Xiaogen
Format: Article
Language:English
Subjects:
Anchorages
Building envelopes
Curtain walls
Damage detection
Resonant frequencies
Stone
Structural damage
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Summary:Dry hanging stone curtain wall is widely used in the building envelopes, but it was of ten deemed as a safety risk. The damage of the back anchorage structure may result in the urban disaster accident due to the falling down of the tone panel. There is no yet effective detection method because the damage part is hidden behind the panel. In this paper, a dynamic detection method is presented to monitor the damage degree of the anchorage structure on the back of the panel and to determine the damage location. Experiments indicate that the first three steps of natural frequency of the stone panel declined, with the increase of the damage degree of the anchorage structure. The degradation of the natural frequency can be used to identify the degree of back connection damage. In addition, the relationship between the damage position of the back connection and the modal parameters of the stone was investigated. It was found that the change of the damaged location significantly affected the modal vibration of the stone panel and the relative discriminant method is proposed to determine the damage position.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/678/1/012026