Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved fastening designs for bridge decks made of mechanically-laminated timber
Highlights Fastening designs with fasteners of 2 types, 4 diameters, 2 fastening orientations. Failure modes of double-shear connection specimens under monotonic tests. Discussion on stiffness, load capacity, and energy accumulation at peak load.
Abstract To develop improved fastening designs with competitive characteristic values such as stiffness, load capacities and energy for Mechanically-laminated Timber (MLT) bridge decks, monotonic tests were conducted on double-shear connections made of galvanized spiral nails of two diameters (4.68 mm, 7.24 mm), three-type self-tapping screws of two diameter (5.80 mm, 5.95 mm) and two fastening orientations (90-degree, 45-degree to loading direction) via a universal electromechanical testing machine. It was found that screws showed better performance in terms of load capacities and energy accumulated at peak load, and, 45-degree fastening tended to give better results in terms of stiffness than 90-degree fastening. The fastening designs of 45-degree oriented screws of zinc coat partially threaded/zinc coat fully threaded were recommended for their 40%/14% higher stiffness, 22%/48% higher yield load capacity, 7%/18% higher peak load capacity, and 66%/71% higher energy accumulated at the peak load than those values of the reference group (i.e., 90-degree fastening of galvanized spiral nail of 4.68 mm diameter).
Improved fastening designs for bridge decks made of mechanically-laminated timber
Highlights Fastening designs with fasteners of 2 types, 4 diameters, 2 fastening orientations. Failure modes of double-shear connection specimens under monotonic tests. Discussion on stiffness, load capacity, and energy accumulation at peak load.
Abstract To develop improved fastening designs with competitive characteristic values such as stiffness, load capacities and energy for Mechanically-laminated Timber (MLT) bridge decks, monotonic tests were conducted on double-shear connections made of galvanized spiral nails of two diameters (4.68 mm, 7.24 mm), three-type self-tapping screws of two diameter (5.80 mm, 5.95 mm) and two fastening orientations (90-degree, 45-degree to loading direction) via a universal electromechanical testing machine. It was found that screws showed better performance in terms of load capacities and energy accumulated at peak load, and, 45-degree fastening tended to give better results in terms of stiffness than 90-degree fastening. The fastening designs of 45-degree oriented screws of zinc coat partially threaded/zinc coat fully threaded were recommended for their 40%/14% higher stiffness, 22%/48% higher yield load capacity, 7%/18% higher peak load capacity, and 66%/71% higher energy accumulated at the peak load than those values of the reference group (i.e., 90-degree fastening of galvanized spiral nail of 4.68 mm diameter).
Improved fastening designs for bridge decks made of mechanically-laminated timber
Zhu, Wanrong (Autor:in) / Gong, Meng (Autor:in) / Chui, Ying-Hei (Autor:in) / Li, Ling (Autor:in)
29.09.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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