Determination of Period of RC Buildings by the Ambient Vibration Method

Table 2

Effect of the infill walls on periods.

ID	Height (m)	Short direction			Long direction
		Before	After	% change	Before	After	% change
S1-31	11.20	0.28	0.26	8.53	0.25	0.21	15.97
S1-32	5.60	0.21	0.15	30.30	0.18	0.15	18.38
S1-33	14.00	0.39	0.32	16.83	0.39	0.32	17.78
S1-34	25.20	0.40	0.34	14.63	0.37	0.34	6.55
S1-35	22.40	0.47	0.44	6.28	0.38	0.37	3.70
S1-36	19.60	0.46	0.40	12.75	0.45	0.36	20.58