Damage detection of simply supported reinforced concrete beam by S transform

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Liu, Ning^1,2 ; Xi, Jiaxin^2 ; Zhang, Xuebing^3 ; Liu, Zhenzhou^2

College of Geo-Exploration Science and Technology, Jilin University, Changchun

130026, China^1

School of Civil Engineering, Jilin Jianzhu University, Changchun

130118, China^2

School of Geomatics and Prospecting Engineering, Jilin Jianzhu University, Changchun

130118, China^3

关键词: Concentrated load;    Loading and unloading;    Multiple reflections;    Potential ability;    Reinforced concrete beams;    Short time Fourier transforms;    Structural damage detection;    Vibration signal;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012133/pdf
DOI  :  10.1088/1755-1315/81/1/012133

来源: IOP

【 摘 要 】

Signal processing is the key component of vibration-based structural damage detection. The S transform is variable window of short time Fourier transform (STFT) or an extension of wavelet transform (WT). The goal of using S transform is to extract subtle changes in the vibration signals in order to detect and quantify the damage in the structure. This paper presents the concentrated load is applied to the simply supported reinforced concrete beam and adopting the stepwise loading method, the vibration signals of each loading and unloading state is obtained by using the hammer impact. Then the vibration data of the reinforced concrete beam pre-damage and post-damage is analysed by S transform. Experimental result shows the potential ability of S transform in identifying peak energy changes and multiple reflections with different loading force state.