“Joints are essential parts of timber structures providing force transfer between structural timber part and providing ductility in case of extreme actions. Joining of timber members is typically realised by means of steel fasteners, such as nails, screws bolts and dowels. By arranging the fasteners perpendicular to the transferred load, shear connections are formed. In this type of connections, the fasteners are supported and fixed by the wood material, ideally allowing for the formation of ductile yield mechanisms in the steel fasteners.
This video shows a tensile testing of a double shear timber-to-timber joint with steel dowel pins. At the beginning the set-up of the experiment is shown. Parallel to the test progress the corresponding load-deformation curve of the joint is drawn. The ultimate limit state of the connection is governed by a combination of plastic deformation of the timber and yielding of the steel dowel pin, forming a plastic hinge. After the test the observed local deformations inside of the joint are shown. Clearly visible is the plastic hinge of the pin and the local plastic deformations in the supporting wood material.”
This is part of the Open Educational Resources Initiative by the Faculty of Civil Engineering of the RWTH Aachen University.
For further information visit: www.fb3.rwth-aachen.de
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