Influence of connection properties on static and dynamic behaviour of structural wood systems

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Connection is an integral part of any structural system and has a strong influence on the performance of the structure. This is particularly true for structural wood systems containing mechanical connections, since these connections are often the weak links in a structure, semi-rigid in nature leading to reduced stiffness and often the only source to dissipate energy under extreme loadings. Numerical models are commonly used by researchers as a tool to study the behaviour of structural wood systems. More recently, due largely to the advancement in computing technologies and the ready availability of commercial analysis software, designers are opting to move away from simple calculation procedures towards the use of numerical models as these models have the potential to provide more accurate prediction of structural behaviour. For wood structural systems containing semi-rigid connections, guidance on how to perform structural analysis is lacking. It is therefore important that the connection properties be properly accounted for in structural analyses. Numerous research projects have been conducted to improve our ability to predict the stiffness and strength of connections. This research program will research one technical issue that has not be properly understood or addressed: influence of combined loads on connection behaviour and in turn on structural response. This is a significant issue, given that most structures are subjected to loading from more than one direction. The research described in this proposal will ultimately provide reliable information which will allow designers to benefit from the advances made in structural design software and computing power to generate more efficient and economical design solutions.