Experimental and Numerical Investigations of Groove Connections for a Novel Timber-Concrete-Composite System
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 6
Abstract
The development of hybrid structures is constantly being pushed forward because of the need for more efficient components that incorporate multiple functions. Structural requirements lead to state-of-the-art timber-concrete-composite (TCC) floor systems, which consist of a concrete layer on top of timber beams or decks. In bending, the TCC concrete layer is in compression and the timber is in tension. When multifunctionality requirements such as building physics or fire protection are added, other solutions of the structural form of hybrid systems can emerge that challenge common engineering conceptions. This paper presents research on the connection system of a novel TCC setup that integrates thermal and fire protection functionality, in which timber beams are placed at the top and a concrete layer at the bottom. The results from full-scale bending tests, and shear and tension tests on a subsection of the system, show that the grooves cut into the timber beams transmit the shear forces and sufficiently connect the concrete deck vertically to the timber. Subsequently, the structural behavior was numerically modeled and the agreement between experimental and numerical results allow for the validated model to be used for geometric optimizations, and predicting the performance of optimized systems.
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Acknowledgments
The research reported in this paper was funded by the Swiss Commission for Technology and Innovation (CTI) and carried out in collaboration with Renggli AG, Pirmin Jung Ingenieure für Holzbau AG, Makiol+Wiederkehr Holzbau-Ingenieure, Jomos Gruppe, and Rekag AG. The help of the technicians at the Tech Park of the Bern University of Applied Sciences in Biel is acknowledged.
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Published In
Journal of Performance of Constructed Facilities
Volume 28 • Issue 6 • December 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 20, 2013
Accepted: Nov 19, 2013
Published online: Nov 21, 2013
Published in print: Dec 1, 2014
Discussion open until: Dec 18, 2014
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