Operational Modal Analysis: A Tool for Assessing Changes on Structural Health State of Historical Constructions after Consolidation and Reinforcement Works—Jura Chapel (Jerez de la Frontera, Spain)

Table 1

OMA results before the works: natural frequencies (f), damping ratios (ξ), and standard deviation (std).

Mode number	SSI				EFDD				MAC
	f (Hz)	std (f)	ξ (%)	std (ξ)	f (Hz)	std (f)	ξ (%)	std (ξ)
Extrados of the vault
1	—	—	—	—	—	—	—	—	—
2	3.00	0.02	2.74	0.52	3.34	1.03	3.03	1.36	0.92
3	4.71	0.65	2.96	0.80	4.83	0.76	1.75	1.26	0.85
4	5.81	0.62	4.03	0.88	6.06	0.11	1.80	1.40	0.88
5	8.60	0.78	3.11	1.11	8.37	0.79	1.04	1.00	0.79
6	10.1	0.39	2.80	0.43	10.2	0.47	0.73	1.03	0.69
Intrados of the vault
1	0.20	0.02	4.62	0.95	0.19	0.00	3.64	0.24	0.88
2	2.99	0.02	3.00	0.41	2.97	0.02	2.75	0.27	0.98
3	4.41	0.01	2.35	0.45	4.59	0.06	1.16	0.10	0.91
4	6.00	0.09	4.16	1.28	6.00	0.07	1.84	1.19	0.89
5	7.82	0.02	2.84	0.34	8.02	0.12	0.73	0.02	0.85
6	10.4	0.04	0.95	0.97	10.4	0.03	0.27	0.34	0.98