Structural adhesive damage identification of hidden frame glass curtain wall based on discrete wavelet transform and vibration transmissibility

In order to establish a degumming damage identification method for hidden frame glass curtain wall (HFSGCW) which can be used in engineering practice. In this paper, a damage identification method based on discrete wavelet analysis (DWT) combined with vibration transmissibility is proposed to detect structural adhesive of HFSGCW. The vibration transmissibility is used as damage parameter to characterize the damage degree of structural adhesive. The results show that rubber hammer is an effective method to obtain accurate vibration spectrum of glass plate. In order to obtain accurate vibration transmissivity, it is suggested to select the edge of glass plate as the measuring point. Under six different structural adhesive damage conditions, the damage parameters of vibration transfer rate increase with the increase of structural adhesive damage degree. The damage parameters of vibration transmissibility obtained by DWT can identify the initial small damage of structural adhesive. A safety state evaluation model of HFSGCW glass plate based on vibration transfer rate is proposed. It is of great significance to evaluate the safety state of HFSGCW glass plate.