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 3

Comparison of modal results before and after restoration works.

Mode number	Natural frequency (EFDD, Hz)		% dif.	MAC
	Before works	After works
1	0.198	—	—	—
2	2.977	3.238	+8.76	0.93
3	4.598	4.776	+3.85	0.80
4	6.007	7.205	+19.94	0.89
5	8.029	9.010	+12.21	0.85
6	10.40	10.40	+0.00	0.98