AN EXPERIMENTAL INVESTIGATION OF THE THERMOMECHANICAL PERFORMANCE OF WOOD STRUCTURES ASSEMBLED WITH DENSIFIED WOODEN DOWELS UNDER FIRE EXPOSURE
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Abstract
This study presents an experimental investigation into the thermomechanical behavior of wood structures assembled with densified wooden dowels under fire exposure. The research focuses on Adhesive-Free Engineered Wood Products (AFEWPs), particularly adhesive-free cross-laminated timber (AFCLT) panels, and timber connections incorporating either thermo-mechanically compressed wooden dowels or conventional steel dowels. A series of thermal and thermomechanical tests were conducted to evaluate internal temperature distribution, charring behavior, and structural displacement at elevated temperatures. The fire performance of dowel-type connections was assessed by comparing the thermal response and deformation of joints using wooden and steel dowels. The results indicate that timber connections incorporating densified wooden dowels exhibited better thermal insulation and lower charring rates compared to those with steel dowels, thereby improving the overall fire resistance of the jointed assemblies. This study highlights the potential of densified wood dowel as a sustainable and fire-resilient alternative to metallic fasteners in engineered wood structures.
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