Experimental Study on the Relationship between the Natural Frequency and the Corrosion in Reinforced Concrete Beams

Table 4

Optimizing curve fit for frequency () and corrosion time ().

Type of fit	General expression	SSE (mm)	R-square
Exponential		0.00613	0.9944
		0.00031	0.9997
Polynomial		0.00753	0.9932
		0.00080	0.9993
		0.00048	0.9996
Power		0.04997	0.9547
		0.00146	0.9987