Near-Fault Response and Loading Protocols of Box Columns in Steel Frames with Self-Centering Braces to Provide Recentering Capability

Table 4

Data of the lateral displacement loading protocols.

15-Story	First-story drift	NF1	NF2	NF3	NF4	NF5	NF6	NF7	NF8	NF9	NF10	NF11	Avg	SD	Avg + SD
Zone A	0.25%–0.5%	3.5	1.5	2	2	0	0.5	2	2	1	0	0	1.32	1.12	2.44
	0.5%–0.75%	0.5	0	1	2	0	0.5	0.5	0	0	0	0	0.41	0.63	1.03
	0.75%–1%	0	0	1	0	0	0	0	0	0	0	0	0.09	0.30	0.39
Zone C	0.25%–0.5%	7	2.5	5	2.5	3.5	6	8.5	1	1	1	2.5	3.68	2.59	6.27
	0.5%–0.75%	0.5	0.5	0	0	0.5	1	3	0.5	0.5	0	0.5	0.64	0.84	1.48
Zone B	Valley drift (%)	−0.52	−0.42	−2.33	−1.20	−0.47	−0.53	−0.63	−0.38	−0.48	−0.49	−1.37	−0.80	0.60	−1.40
	Peak drift (%)	2.30	0.78	3.01	4.74	0.60	0.55	1.26	0.68	0.57	0.54	3.95	1.72	1.54	3.26
	Residual drift (%)	0.47	0.11	1.83	0.45	0.02	0.00	0.39	0.05	0.02	0.00	0.65	0.36	0.54	0.90