Tests and Analyses of Slotted-In Steel-Plate Connections in Composite Timber Shear Wall Panels

Figure 6

Failure modes for the uplift tests: (a) a cut through the screw of the specimen in the single screw uplift test, which was terminated just after the ultimate load was reached. The screw is slightly bent and is partially broken at the intersection with the steel plate (right side; cf. Figure 10(b)), indicating a brittle type of bending failure; (b) a test of the four-screw configuration after testing showing the inside of the slot where the front part of the PlyBoard has been cut off and folded down and the steel plate has been moved upwards to reveal the interior sides of the slot. It is noted that the screws are heavily indented in the LVL; screws numbers 1 and 4 are also broken at the head-shank interface eventually causing the loose parts to align parallel to the load direction; furthermore hole number 2 holds a remaining plug in the steel plate (the screw has been cut off on both sides) and the plate as well as the LVL shows evident scratch marks especially from screws 1 and 4.

(a)

(b)