Free and Forced Vibration Analysis of an Infilled Steel Frame: Experimental, Numerical, and Analytical Methods

Table 4

Percentage of the errors between numerical, analytical, and codified methods with experimental tests.

Direction	Numerical methods						Approximate formulas				Codified-based methods
	N1	N2	N3	N4	N5	N6	F1	F2	F3	F4	C1	C2	C3
N-S	40%	36%	11%	5%	5.5%	10.7%	39%	44%	6.3%	1.5%	11.5%	9.3%	9.3%
E-W	44%	40%	10%	5.6%	6%	11.2%	44%	47%	7.2%	2.4%	4.4%	2%	2%