New Measurement Technology of Structural Silicone Sealant in Hidden Frame Supported Glass Curtain Wall Based on FFT Power Spectrum

The measurement based on FFT power spectrum of pulse transient dynamic response of structural silicone sealant damage in Hidden frame supported glass curtain wall was first proposed in the paper. The signal of four testing points was gathered and FFT Power Spectrum was used to analyze. Power spectral main peak frequency of the signal in contributing proportion of the total power (η_i) was taken as a dependent variable of the structural silicone sealant damage length (α). Experimental data were fitted to establish a functional relations between `α´ and `η_i´ by Gaussian function or Lorentzian function, and the small damage value of `α´ was used to be detected. Research results show that it will be helpful for the application of the structural silicone sealant damage detection technology in the hidden frame supported glass curtain wall.