Seismic Retrofit of Reinforced Concrete Frame Buildings with Hysteretic Bracing Systems: Design Procedure and Behaviour Factor

Table 2

Main characteristics of each storey of the bare structure.

Storey	Interstorey height  (m)	Seismic mass  (t)	Direction				Direction
			(kN)	(kN/mm)	%		(kN)	(kN/mm)	%
1st	3.1	115	325	44	20	0.31	360	49	18	0.31
2nd	6.2	115	287	35	0	0.64	317	40	3	0.64
3rd	9.3	115	206	35	6	0.88	228	39	8	0.88
4th	12.4	86	95	33		1.00	105	36		1.00