The performance of laterally loaded cross-braced timber frames (1988)
AuthorsDeam, B. L.show all
The overall behaviour of laterally loaded cross-braced timber frames is investigated. Frame behaviour is classified as ductile or non-ductile when subject to reverse cyclic loading. Individual Nailon plated joints were tested and a regression equation fitted to the load displacement curves. The strength of Nailon plated joints loaded perpendicularly to the grain was investigated. Ten frames simulating diagonally braced light timber frame walls incorporating a variety of joint details were constructed and tested to failure. In addition, four diagonally braced frames with Nailon plated joints were tested. Two types of connection suitable for attachment of a frame to its supports were tested. A numerical model of Nailon plate was developed and used to predict the behaviour of a particular type of connector.
Toothplate connectors and light nailstrap bracing are identified as non-ductile elements in a frame. Frames constructed with Nailon plate are strong, stiff and ductile. Published design loads for nails in Nailon plate appear to be conservative. Frames must be detailed to prevent out-of-plane buckling of the timber members. Joints must be detailed to minimize the effects of combined perpendicular-to-grain tension and shear in the timber. More investigation is required on joints where this occurs.