非稳态情况下钢筋锈蚀测量的噪声谱方法

Noise Spectrum Method for Measurement of Corrosion of Rebar in Non-steady Case

摘要:

在长期持续载荷作用下,采用随机抽样后进行统计平均的噪声谱方法,将混凝土中钢筋的腐蚀电流产生振荡时的噪声信号在复平面上表示后进行逆Fourier变换及低通滤波,得到所需的腐蚀电阻.该方法可客观反映非稳态情况下钢筋锈蚀的特征,克服了常用的线性极化法在测量产生振荡现象的腐蚀电流时所存在的局限性.

Abstract:

The noise spectrum method to treat the random sampling signals by statistical(averag-)(ing) was proposed to measure the oscillating corrosion current of rebar in concrete under sustained loading.The corrosion resistance of steel rebar is obtained from the noise signals after reverse Fourier transform and low-pass filtering.The method is valid for the measurement of corrosion of rebar and overcome the limitation of traditional method of linear polarization in measuring the oscillating corrosion current.