Improved Fastener-Based Modelling Method for Reinforced Cold-Formed Steel Shear Walls

Table 3

Input parameters of fasteners.

Projects	GWB and BMG					BMG
	Interior studs	Tracks	□-89	□-140	Chord studs	Interior studs	Tracks	□-140
deeq (mm)	0.78	1.10	1.04	1.04	1.04	0.41	0.55	0.50
dyeq (mm)	3.24	4.96	4.29	4.29	5.33	1.69	2.47	2.11
dmeq (mm)	7.75	11.76	7.53	7.53	12.86	3.75	5.45	3.82
dueq (mm)	25.0	25.0	25.0	35.0	40.0	40.0	40.0	40.0
feeq (N)	509	570	564	847	564	303	299	301
fyeq (N)	1050	1181	1171	1568	1171	622	616	628
fmeq (N)	1273	1411	1437	1760	1411	758	747	758
fueq (N	50	50	50	50	50	50	50	50
rDispP/rForceP/uForceP						0.5/0.3/0.1
βK1,2/βK3,4/βKlimit		—				0.5/1.5/0.1
βD1,2/βD3,4/βDlimit						0.45/1.5/0.1
βF1,2/βF3,4/βFlimit						0.0/0.0/0.0

□-89 and □-140 mean 89 mm deep and 140 mm deep end studs, respectively; d_eeq, d_yeq, d_meq, and d_ueq are shear deformations and f_eeq, f_yeq, f_meq, and f_ueq are shear strength of sheathing-to-stud connections in each stage; the meanings of r_DispP, r_ForceP, and u_ForceP are identical to those in Figure 3; β_K1,2, β_K3,4, β_Klimit, β_D1,2, β_D3,4, β_Dlimit, β_F1,2, β_F3,4, and β_Flimit are the damage factors and their corresponding limit indexes relative to loading and unloading stiffness and strength.