Novel Hold-Down Solutions for Cross-Laminated Timber Shear Walls
Publication: Structures Congress 2022
ABSTRACT
Cross-laminated timber (CLT), an engineered wood product categorized as “mass timber,” is gaining popularity in residential and non-residential applications. The prospect of building larger timber structures creates structural challenges, amongst them being that lateral forces created by high winds and strong earthquakes are higher and create higher demands of “hold-downs.” These demands are multiple: high strength to resist loads, high stiffness to minimize deflections during wind events, as well as deformation compatibility to facilitate the desired rocking-motion of the shear walls during an earthquake. Herein, recent research on several innovative hold-down solutions will be provided: internal-perforated-steel-plates fastened with self-drilling dowels; hyperelastic rubber pads with steel rods; and solutions with self-tapping screws. All systems are capacity-protected in the non-dissipative components: strength, stiffness, and ductility is governed by the energy-dissipative shear wall components. The results from component-level and full-scale CLT shear wall tests are presented. The findings provide design guidance to practicing engineers and will inform future revisions of the Canadian Standard for Engineering Design in Wood.
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Structures Congress 2022
Pages: 232 - 238
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Published online: Apr 18, 2022
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