Abstract:
Precast concrete panels are typically connected to one another, and to supporting frames, using either cast-in-place connections, welded embedded steel connections, embedded insert connections, or drilled-in insert connections. A number of failures were observed in connections between precast concrete panels during the Canterbury earthquake sequence, with failure most commonly occurring in bolted connections including panel-to-roof, panel-to-column and panel-to-panel (vertical joint) connections. The failure mechanisms were attributed to insufficient edge distance to the bolts, insufficient bolt anchorage, and insufficient tensile capacity to resist the large out-of-plane forces acting on the panels during the earthquakes. Following the Canterbury earthquakes a critique of these observed failure modes was undertaken and a literature review was initiated to establish past laboratory performance of the relevant connection types. Testing was carried out on bolted connections and the results are presented.