Dynamic Modification and Damage Propagation of a Two-Storey Full-Scale Masonry Building

Table 3

Natural frequencies and modal damping ratios for the structure during ambient test phases 1 to 5.

	Phase 1	Phase 2	Phase 3	Phase 4	Phase 5	Phase 6
f (Hz)	7.38	7.20	7.03	6.42	5.68	6.78
ζ (%)	6.07	6.48	6.71	7.36	11.21	7.74