Tests and Analyses of Slotted-In Steel-Plate Connections in Composite Timber Shear Wall Panels
Table 1
Result of the uplift tests parallel and perpendicular (single screw only) to LVL grain (CoV = coefficient of variation; Displ. = displacement).
(a)
Uplift tests
Single screw connection
Double screw connection
Four-screw connection
Perpendicular to grain (5 tests)
Parallel to grain (8 tests)
Parallel to grain (4 tests)
Parallel to grain (6 tests)
Capacity
Ultimate load [kN]
Displ. at ultimate load [mm]
Ultimate load [kN]
Displ. at ultimate load [mm]
Ultimate load [kN]
Displ. at ultimate load [mm]
Ultimate load [kN]
Displ. at ultimate load [mm]
Mean per connection
5.09
2.25
7.42
2.32
13.67
3.93
25.14
3.35
(per screw)
(5.09)
(7.42)
(6.84)
(6.28)
CoV [%]
9.4
11
9.9
8.5
18
27
4.7
27
Failure mode
A
B1
B2
B2
A: wood failure in the LVL, initiated by tensile failure followed by shear failure in the LVL-board interface. B1: brittle type of failure of connection due to brittle bending failure of screw after some plastic deformations; see Figure 8(a). B2: semiductile type of failure of the connection due to successive (time-lagged) and overlapping mode B1 type of failure of the fasteners.
