Effect of temperature on the mechanical performance of glued-in rods in timber structures |
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| Affiliation: | 1. ESTIA, Technopôle Izarbel, 97 allée Théodore Monod, F-64210 Bidart, France;2. I2M, Université de Bordeaux, 351 Cours de la Libération, F-33400 Talence, France;3. LRMH, 29 rue de Paris, F-77420 Champs-sur-Marne, France;1. Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen,Germany;2. Department of Wood Science The University of British Columbia, 2424 Main Mall, Vancouver, Canada;1. Empa, Swiss Federal Laboratories for Materials Science and Technology, Structural Engineering Research Laboratory, Ueberlandstrasse 129, CH-8600 Dübendorf, Switzerland;2. Division of Structural Mechanics, Faculty of Engineering LTH, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden;3. Department of Structures, Faculty of Civil Engineering, University of Zagreb, Kaciceva 26, 10 000 Zagreb, Croatia;4. Civil Engineering Research Centre, Queen’s University, Belfast University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom;1. School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China;2. College of Civil Engineering, Nanjing Tech University, Nanjing 211816, PR China;3. China Railway Urban Planning & Design Institute Co., Ltd., Wuhu 241000, PR China;1. Department of Engineering and Architecture, University of Trieste, Piazzale Europa 1, 34127 Trieste (TS), Italy;2. Polytechnical Department of Engineering and Architecture, University of Udine, via delle Scienze 206, 33100 Udine (UD), Italy;3. Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia (BS), Italy;1. School of Civil Engineering, Southeast University, Nanjing 210096, PR China;2. College of Civil Engineering, Nanjing Tech University, Nanjing 211816, PR China |
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| Abstract: | Structural bonding technology has proven to be an economically and attractive connection process in timber engineering. Within old or historical wooden buildings, local reinforcement of weak zones is often performed with glued-in rods. This kind of connection typically allows the transfer of loads within wooden elements by means of threaded steel rods glued with a structural adhesive. This paper relates to experimental and numerical investigations on small sized specimens, with the aim of providing a better knowledge about the elastic behavior according to temperature. Experimental results reveal that stiffness of bonded-in rods significantly decreases once the glass transition temperature of the adhesive is reached. However, the ultimate shear strength is constant and sudden failures occur in the wood close to the adhesive whatever the temperature is. Then, an elastic finite element model allows the evolution of the Young modulus of the adhesive with temperature changes and also reveals the stress distribution along the glued-in depth during the elastic regime. |
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| Keywords: | Epoxides Destructive testing Finite element stress analysis Joint design |
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