Seismic Fragility of Chinese Light-Gauge Steel Keel Gypsum Board Partition Walls
Table 2
Failure patterns.
Group
Number of specimens
Connection type
Connection distance (mm)
Damage phenomena
A
3
Shot pin
600
Cracks in the gypsum boards of the transverse walls on both sides, Figure 6(a); cracks in the internal corner, Figure 6(b); loose, dislodged, sheared shot pins at the connection, Figure 6(c); tearing of the track, Figure 6(d); separation of the transverse and longitudinal wall, Figure 6(e).
B
3
Shot pin
400
C
3
Shot pin
200
D
3
Shot pin-backing plate
200
Cracks in the gypsum boards of the transverse walls on both sides; cracks in the internal corner; loosening, dislodging, and shearing off of the shot pins at the connection; tearing of the track; separation of the transverse and longitudinal walls; cracking between the gypsum boards of the longitudinal wall, Figure 6(f).
E
3
Expansion bolt
200
Cracks appearing in the transverse walls on both sides, cracks in the internal corner, cracks between the gypsum boards of the longitudinal wall, loosening and dislodging of the self-tapping screws between the gypsum board and the keel, Figure 6(g), local crushing of the gypsum boards, Figure 6(h), local separation of the gypsum board and keel, Figure 6(i), severe local buckling of the steel stud, Figure 6(j).
