A Review on Moment-Resisting Connections for Timber Frames

Alexia Brandao Ribeiro; João Negrão; Alfredo Dias

doi:10.3989/ic.7098

Authors

Alexia Brandao Ribeiro ISISE - Institute for Sustainability and Innovation in Structural Engineering, University of Coimbra https://orcid.org/0000-0001-8274-4449
João Negrão Civil Engineering Department, University of Coimbra https://orcid.org/0000-0001-6044-2044
Alfredo Dias SISE - Institute for Sustainability and Innovation in Structural Engineering, University of Coimbra https://orcid.org/0000-0002-9752-1907

DOI:

https://doi.org/10.3989/ic.7098

Keywords:

ductility, polygonal connection, lever connection, pre-stressed connection, moment strength, stiffness

Abstract

The discontinuity of wood fibres at the intersections of beam-column connections poses challenges to the transmission of moments between these elements. Some engineering solutions employ different mechanical principles to solve this problem. For example, the polygonal arrangement of connectors is a widely adopted solution; the connectors are inserted perpendicularly to the bending plane and act in shear. Another example is the lever mechanism, which balances the moment through a torque created by the tension of a metal connector and compression against the wood. An innovative proposal involves reinforced concrete nodes, where the continuity of the bending moment is ensured by glued-in rods anchored in the timber beam and column with structural epoxy resin. Another solution is the pre-stressed connection, where the balancing moment is achieved by adjusting the compressive stresses introduced by the prestress. This work aims to present, classify, and compare these solutions in terms of structural behaviour.

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