Effectiveness of Friction Dampers in Seismic and Wind Response Control of Connected Adjacent Steel Buildings

Table 2

Modal periods of the unconnected steel MRF and BF structures.

Building type	Modal periods
	First	Second	Third
5-storey MRF	0.54	0.18	0.12
10-storey MRF	1.02	0.34	0.21
15-storey MRF	1.51	0.51	0.31
20-storey MRF	1.90	0.63	0.38
5-storey BF	0.32	0.11	0.07
10-storey BF	0.62	0.21	0.13
15-storey BF	0.91	0.31	0.18
20-storey BF	1.15	0.38	0.23