Estimation of Inelastic Interstorey Drift for OSB/Gypsum Sheathed Cold-Formed Steel Structures under Collapse Level Earthquakes

Table 3

Hysteretic parameters of specimens.

Name	Backbone parameters							Unloading parameter	Pinching parameters
	K0 (kN·m^−2)	Vy (kN·m^−1)	Vu (kN·m^−1)	α	β	γ	μ	θ	δ	λ
BX-A	868.0	9.76	11.74	0.199	0.061	−0.062	3.83	10.2	0.82	0.25
BX-B	1086.0	10.87	12.69	0.261	0.075	−0.046	3.45	8.9	0.69	0.19
BX-2A	237.5	3.06	3.58	0.219	0.071	−0.034	4.38	11.4	0.73	0.20
BX-2B	312.5	3.19	3.78	0.256	0.058	−0.039	5.00	10.7	0.75	0.14
BX-2C	268.8	3.22	3.70	0.392	0.053	−0.029	5.32	9.1	1.01	0.30
BX-4A	687.5	8.44	10.21	0.331	0.088	−0.082	3.67	8.9	0.94	0.14
BX-4B	668.3	8.13	9.65	0.286	0.085	−0.064	3.74	9.9	0.89	0.17
BX-4C	716.7	8.75	10.66	0.365	0.102	−0.073	3.42	12.3	0.71	0.23
BX-6	850.0	10.08	11.65	0.317	0.074	−0.103	3.75	7.5	0.99	0.33
BX-7	1066.7	10.58	12.72	0.292	0.083	−0.065	4.01	9.1	0.84	0.09
BX-8	297.1	3.25	3.75	0.314	0.099	−0.087	5.15	10.0	0.85	0.15
BX-9	700.0	8.67	10.49	0.287	0.071	−0.098	3.72	9.4	0.77	0.19
WA-2	1364.4	9.23	12.37	0.301	0.103	−0.069	3.06	13.6	1.03	0.27
WA-4	1487.1	13.68	15.55	0.246	0.079	−0.112	2.49	11.7	1.15	0.26
W-SO75	612.5	6.90	8.20	0.308	0.057	−0.107	3.68	9.6	0.77	0.17
W-SF75	380.4	4.31	5.03	0.225	0.081	−0.079	3.18	9.3	0.98	0.30
W-OP75	949.2	10.60	12.58	0.347	0.076	−0.086	4.07	7.8	0.87	0.28
HS-90-1	1446	12.03	15.05	0.370	0.072	−0.057	5.36	10.4	0.90	0.17
HS-140-1	1610	8.10	9.85	0.299	0.069	−0.034	5.33	9.2	1.04	0.20
Average value	n.a.	n.a.	n.a.	0.296	0.077	−0.070	4.03	9.9	0.88	0.21