Energy Dissipation and Local, Story, and Global Ductility Reduction Factors in Steel Frames under Vibrations Produced by Earthquakes

Table 3

Mean values of µ_Lϕ, R_µLϕ, and Q_L, 3-level building.

Parameter	Type of member	ST	NS direction					EW direction
			Sa/g values					Sa/g values
			0.4	0.6	0.8	1.0	1.2	0.4	0.6	0.8	1.0	1.2
µLϕ	Beams	1	2.61	4.27	5.99	8.23	10.22	2.19	3.56	4.56	6.33	7.81
		2	2.48	4.60	7.17	9.57	11.86	2.26	4.15	5.87	7.69	9.32
		3	2.01	4.31	6.71	8.94	11.20	1.99	3.73	5.59	7.67	9.30
	Columns	1	1.06	1.32	1.95	2.65	3.70	1.01	1.25	1.72	2.22	2.87
		2	1.00	1.00	1.09	1.25	1.41	1.00	1.01	1.03	1.21	1.29
		3	1.00	1.00	1.06	1.12	1.23	1.00	1.00	1.02	1.13	1.26
RµLϕ	Beams	1	1.68	2.29	2.89	3.45	4.06	1.54	2.12	2.68	3.22	3.91
		2	1.66	2.25	2.79	3.28	3.86	1.55	2.11	2.65	3.16	3.81
		3	1.58	2.11	2.60	3.06	3.60	1.50	2.01	2.50	2.97	3.54
	Columns	1	1.52	1.87	2.25	2.60	2.98	1.35	1.66	2.00	2.35	2.79
		2	1.50	1.85	2.19	2.51	2.86	1.37	1.71	2.01	2.32	2.71
		3	1.55	1.95	2.28	2.59	2.95	1.43	1.81	2.17	2.51	2.92
QL	Beams	1	0.64	0.54	0.48	0.42	0.40	0.70	0.60	0.59	0.51	0.50
		2	0.67	0.49	0.39	0.34	0.33	0.69	0.51	0.45	0.41	0.41
		3	0.79	0.49	0.39	0.34	0.32	0.75	0.54	0.45	0.39	0.38
	Columns	1	1.43	1.42	1.15	0.98	0.81	1.34	1.33	1.16	1.06	0.97
		2	1.50	1.85	2.01	2.01	2.03	1.37	1.69	1.95	1.92	2.10
		3	1.55	1.95	2.15	2.31	2.40	1.43	1.81	2.13	2.22	2.32