Multi-panel Cross Laminated Timber shear-walls with stiff vertical joints may represent a valuable structural solution for multi-storey timber buildings in low seismic prone areas. In this study, the opportunity of using shear-key connectors in the assemblage of stiff vertical joints as an alternative to short-spacing traditional doweltype mechanical fasteners is evaluated. The mechanical behaviour of two types of stiff shear-key connectors is investigated through an experimental campaign conducted at joint and wall level. Shear tests were firstly carried out to determine the mechanical properties of panel-to-panel joints assembled with the shear-key connectors. The results are compared with those obtained from shear tests on joints with screwed connections (half-lap and spline joints). Full-scale shear-wall tests were then performed to determine the mechanical performances of the connectors at wall level. Joints with a single shear-key connector showed values of stiffness and strength comparable to those that would be obtained for vertical spline joints with approximately thirteen couples of 6 mm screws. The failure modes on the joints with shear-key connector were characterized by either a localized crushing in the wood or the shear failure in outer lamination of the CLT panels with no plastic deformation of the connectors.

Mechanical Behaviour of Multi-Panel Cross Laminated Timber Shear-Walls with Stiff Connectors / Polastri, A; Casagrande, D. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 2022, 332:127275(2022). [10.1016/j.conbuildmat.2022.127275]

Mechanical Behaviour of Multi-Panel Cross Laminated Timber Shear-Walls with Stiff Connectors

Casagrande D
2022-01-01

Abstract

Multi-panel Cross Laminated Timber shear-walls with stiff vertical joints may represent a valuable structural solution for multi-storey timber buildings in low seismic prone areas. In this study, the opportunity of using shear-key connectors in the assemblage of stiff vertical joints as an alternative to short-spacing traditional doweltype mechanical fasteners is evaluated. The mechanical behaviour of two types of stiff shear-key connectors is investigated through an experimental campaign conducted at joint and wall level. Shear tests were firstly carried out to determine the mechanical properties of panel-to-panel joints assembled with the shear-key connectors. The results are compared with those obtained from shear tests on joints with screwed connections (half-lap and spline joints). Full-scale shear-wall tests were then performed to determine the mechanical performances of the connectors at wall level. Joints with a single shear-key connector showed values of stiffness and strength comparable to those that would be obtained for vertical spline joints with approximately thirteen couples of 6 mm screws. The failure modes on the joints with shear-key connector were characterized by either a localized crushing in the wood or the shear failure in outer lamination of the CLT panels with no plastic deformation of the connectors.
2022
127275
Polastri, A; Casagrande, D
Mechanical Behaviour of Multi-Panel Cross Laminated Timber Shear-Walls with Stiff Connectors / Polastri, A; Casagrande, D. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 2022, 332:127275(2022). [10.1016/j.conbuildmat.2022.127275]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/401525
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