Seismic Fragility of Chinese Light-Gauge Steel Keel Gypsum Board Partition Walls

Table 4

Specimen damage state and interstory drift ratio (unit: %).

Damage state	Damage characteristics	A1	A2	A3	B1	B2	B3	C1	C2	C3	D1	D2	D3	E1	E2	E3
	Cracks starting in the gypsum boards	0.57	0.29	0.22	0.65	0.44	0.20	0.31	0.44	0.26	0.35	0.25	0.23	0.29	0.25	0.29
	Slipping of the partition wall-structure connection	0.25	0.32	0.20	0.25	0.61	0.25	0.47	0.35	0.50	0.39	0.41	0.35	—	—	—
	Loosening of the self-tapping screws around the gypsum board	—	—	—	—	—	—	—	—	0.79	0.53	—	—	0.57	0.39	0.44
	Minimum drift level triggering	0.25	0.29	0.20	0.25	0.44	0.20	0.31	0.35	0.26	0.35	0.25	0.23	0.29	0.25	0.29
	Cracks in the middle of the gypsum boards of the transverse wall	0.74	0.96	0.83	1.02	1.09	0.90	0.90	0.84	0.79	1.72	1.26	1.36	—	—	—
	Cracks between the gypsum boards of the longitudinal wall	—	—	—	1.02	1.86	1.59	1.72	1.59	1.36	0.90	1.02	1.02	1.36	0.87	1.17
	Crushing of the gypsum boards at the wall corner	—	—	—	—	—	—	—	—	—	—	—	—	0.84	0.74	1.09
	Failure of the self-tapping screws around the gypsum board or loosening of the self-tapping screws in the middle of the gypsum boards	—	—	—	—	—	—	—	—	—	—	1.72	—	1.26	1.59	1.72
	Minimum drift level triggering	0.74	0.96	0.83	1.02	1.09	0.90	0.90	0.84	0.79	0.90	1.02	1.02	0.84	0.74	1.09
	Failure of the partition wall-structure connection	0.90	1.72	0.90	1.26	2.34	0.84	2.01	1.26	1.09	0.90	1.47	1.17	—	—	—
	Separation of the gypsum board from the steel stud	—	—	—	—	—	—	—	—	—	—	—	—	0.90	1.12	1.47
	Local bending and plastic hinge occurring in the steel stud	—	—	—	—	—	—	—	—	—	—	—	—	1.36	1.26	1.09
	Minimum drift level triggering	0.90	1.72	0.90	1.26	2.34	0.84	2.01	1.26	1.09	0.90	1.47	1.17	0.90	1.12	1.09

Note: data in the table are interstory drift ratios (unit: %).