Identification of Torsionally Coupled Shear Buildings Models Using a Vector Parameterization

Table 2

Estimated natural frequencies.

Natural frequency (rad/s)	Estimate with	Error (%)	Estimate with	Error (%)	Estimate with	Error (%)
= 9.588	10.948	= 14.186	10.785	= 12.485	10.752	= 12.139
= 9.971	11.372	= 14.048	11.244	= 12.763	11.153	= 11.853
= 14.476	14.696	= 1.518	14.005	= 3.2540	14.572	= 0.659
= 29.814	31.937	= 7.120	31.831	= 6.765	31.766	= 6.548
= 30.775	32.834	= 6.690	32.560	= 5.799	32.346	= 5.103
= 43.335	45.563	= 5.141	45.015	= 3.877	44.636	= 3.003
= 46.213	48.677	= 5.332	48.498	= 4.944	48.368	= 4.664
= 48.418	50.344	= 3.978	49.978	= 3.221	49.678	= 2.603
= 60.978	62.049	= 1.756	61.882	= 1.482	61.729	= 1.231
= 63.020	63.904	= 1.402	63.524	= 0.800	63.196	= 0.280
= 68.550	69.844	= 1.889	69.389	= 1.224	68.910	= 0.5255
= 72.005	71.580	= 0.591	71.275	= 1.014	71.015	= 1.375
= 72.319	72.729	= 0.567	72.243	= 0.106	71.791	= 0.731
= 90.289	89.871	= 0.463	89.087	= 1.332	88.279	= 2.226
= 110.081	100.990	= 8.258	100.112	= 9.056	99.030	= 10.040
		= 25.392		= 23.405		= 22.468