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

Table 4

Statistics for µ_S, R_µS, and Q_S, 3-level building.

Parameter	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
µS	1	1.61	1.99	2.81	3.44	3.95	1.48	1.90	2.80	2.89	4.28
	2	1.70	2.20	2.86	3.31	3.99	1.65	2.15	2.58	3.09	3.54
	3	1.53	1.93	2.69	2.99	3.90	1.52	2.10	2.72	3.19	3.84
RµS	1	1.46	1.90	2.37	2.76	3.10	1.33	1.73	2.11	2.51	2.89
	2	1.44	1.86	2.30	2.68	3.05	1.36	1.84	2.25	2.68	3.06
	3	1.45	1.84	2.17	2.47	2.76	1.36	1.75	2.08	2.36	2.67
QS	1	0.91	0.95	0.84	0.80	0.78	0.90	0.91	0.75	0.87	0.68
	2	0.85	0.85	0.80	0.81	0.76	0.82	0.86	0.87	0.87	0.86
	3	0.95	0.95	0.81	0.83	0.71	0.89	0.83	0.76	0.74	0.70