This book contains the contributions from the RILEM International Symposium on Materials and Joints in Timber Structures that was held in Stuttgart, Germany from October 8 to 10, 2013. It covers recent developments in the materials and the joints used in modern timber structures. Regarding basic wooden materials, the contributions highlight the widened spectrum of products comprising cross-laminated timber, glulam and LVL from hardwoods and block glued elements. Timber concrete compounds, cement bonded wood composites and innovative light-weight constructions represent increasingly employed alternatives for floors, bridges and facades. With regard to jointing technologies, considerable advances in both mechanical connections and glued joints are presented. Self-tapping screws have created unprecedented options for reliable, strong as well as ductile joints and reinforcement technologies. Regarding adhesives, which constitute the basis of the jointing/laminating technology of modern timber products, extended options for tailor-made bonding solutions have to be stated. Apart from melamine-urea and phenolic-resorcinol adhesives, one-component-polyurethanes, emulsion isocyanate polymers and epoxies offer a wide range of possibilities. The contributions dealing with experimental and numerical investigations on static, cyclic and seismic behavior of structures clearly reveal the enhanced potential of modern timber construction for reliable and sustainable buildings and bridges of the new millennium.The book is structured in nine thematic areas, beingI) StructuresII) Mechanical ConnectionsIII) Glued Joints and AdhesivesIV) Timber and Concrete/Cement/Polymer CompositesV) Cyclic, Seismic BehaviorVI) Hardwood, Modified Wood and BambooVII) Cross-Laminated TimberVIII) Properties and Testing of WoodIX) Glulam

Unique compilation of most advanced materials and jointing techniques in timber structures Deals, f.e., with techniques involving ductile joints with mechanical fasteners and very stiff glued joints Showcases timber structures as a viable ecological alternative to other structures

Inhalt

Preface.- Part 1 Structures.- Structures 1: Horizontal displacements in medium-rise timber buildings Basic FE modeling in serviceability limit state, by I. Näslund , H. Johnsson.- Moment resistance of a concealed timber post base joint, by J. Humbert, S. J. Lee, J. S. Park, M. J. Park.- The multifunctional TES-façade joint, by S. Loebus, S. Ott, S. Winter.- Green-glued products for structural applications, by E. Serrano, J. Oscarsson, M. Sterley, B. Enquist.- Structures 2:Experimental analysis of a post-tensioned timber connection, by F. Wanninger, A. Frangi.- Risk based investigations of partly failed or damaged timber constructions, by G. Fink, J. Kohler.- Naturally grown round wood ideas for an engineering design, by M. Frese, H. J. Blaß.- Recycling and end of life scenarios for timber structures, by A. Hafner, S. Ott, S. Winter.- Structures 3:Advancements for the structural application of fiber reinforced moulded wooden tubes, by J. Wehsener, T. Werner, J. Hartig, P. Haller.- Sole plate fixing details for modern methods of timber construction, by J. Menendez, K. Leitch, R. Hairstans.- Thin-walled timber structures, by B. P. Gilbert, S. B. Hancock, H. Bailleres.- Structures 4: Statically indeterminate structures in a brittle material, by A. Lawrence.- Novel lightweight timber composite element - web design in shear and compression, by C. Stritzke, S. Aicher.- Latest developments in timber bridge constructions, by F. Miebach, D. Niewerth.- Part 2 Mechanical Connections.- Mechanical Connections 1:Steel-to-timber joints with very high strength steel dowels using spruce, beech and azobé, by J.W. van de Kuilen, C. Sandhaas, H. Blaß.- Wood load-carrying capacity of small dowel-type timber connections an extended application for nails and screws, by P. Zarnani, P. Queenneville.- Ductility in timber structures considering the plastic behaviour of dowel type fasteners, by F. Brühl, J. Schänzlin, U. Kuhlmann.- An experimental study onbearing strength in compression for bolted joint of plywood, by A. Ohtsuka, S. Takahashi, T. Ito, W. Kambe.- Mechanical Connections 2:Investigations concerning the force distribution along axially loaded self-tapping screws, by A. Ringhofer, G. Schickhofer.- Experimental analysis on the structural behaviour of connections with LVL made of beech wood, by P. Kobel, R. Steiger, A. Frangi.- The embedment failure of European beech compared to spruce wood and standards, by S. Franke, N. Magnière Mechanical Connections 3: Modelling of non-metallic timber connections at elevated temperatures, by D. Brandon, M. P. Ansell, R. Harris, P. Walker, J. Bregulla.- Analysis of the brittle failure and design of connections loaded perpendicular to grain, by B. Franke, P. Quenneville.- Structural performance and advantage of DVW reinforced moment transmitting timber joints with steel plate connectors and tube fasteners, by D. Brandon, A. Leijten.- Fully threaded self-tapping screws subjected to combined axial and lateral loading with different load to grain angles, by R. Jockwer, R. Steiger, A. Frangi.- Mechanical Connections 4:Alternative approach to avoid brittle failure in dowelled connections, by D. Wrzesniak, M. Fragiacomo, A. Jorissen.- Resistance and failure mode of axially loaded groups of screws, by U. Mahlknecht, R. Brandner, A. Ringhofer, G. Schickhofer.- A method to determine the plastic bending angle of dowel-type fasteners, by M. Steilner, H. J. Blaß.- Low damage design using a gravity rocking moment connection, by M. Jamil, P. Quenneville, C. Clifton.- Part 3 Glued Joints and Adhesives.- Glued Joints and Adhesives 1:Finger jointing of freshly sawn Norway spruce side boards a comparative study of fracture properties of joints glued with phenol-resorcinol and one-component polyurethane adhesive, by M. Sterley, E. Serrano, B. Enquist, J. Hornatowska.- Pressure distribution in block glue lines analyzed by theory of beams on elastic foundation, by G. Stapf, S. Aicher.-EPI for glued laminated timber, by K. Groestad, R. Bredesen.- Bonding of various wood species studies about their applicability in glued-laminated timber, by Y. Jiang, J. Schaffrath, M. Knorz, S. Winter.- Glued Joints and Adhesives 2:Fatigue performance of adhesive connections for wooden wind towers, by L. Bathon, O. Bletz-Mühldorfer, J. Schmidt, F. Diehl.- Multifunctional wood-adhesives for structural health monitoring purposes, by C. Winkler, U. Schwarz.- Assessment of the glue-line quality in glued laminated timber structures, by B. Franke, F. Scharmacher, A. Müller.- Review of recent applied research activities on one-component PUR-adhesives for engineered wood products, by C. Lehringer, J. Gabriel.- Part 4Timber and Concrete/Cement/PolymerComposites.- Timber and Concrete/Cement/Polymer Composites 1:Development of a high-performance hybrid system made of composites and timber (High-Tech Timber Beam), by M. Jahreis, M. Kästner, W. Hädicke, K. Rautenstrauch.- Experimental study of the composite timber-concrete SBB connection under monotonic and reversed-cyclic loadings, by M. Manthey, Q. H. Nguyen, H. Somja, J. Duchêne, M. Hjiaj.- The predictive model for stiffness of inclined screws as shear connection in timber-concrete composite floor, by F. Moshiri, R. Shrestha, K. Crews.- Shear performance of wood-concrete composite with different anchorage length of steel rebar, by S. J. Lee, J. Humbert, K. M. Kim, J. S. Park, M. J. Park.- Timber and Concrete/Cement/Polymer Composites 2:Development of prefabricated timber-concrete composite floors, by P. Kuklik, P. Nechanicky, A. Kuklikova.- Wood based construction for multi-storey buildings application of cement bonded wood composites as structural element, by A. Fadai, M. Fuchs, W. Winter.- 45 Rehabilitation, upgrading and repair of historic timber structures with polymer concrete and FRP-reinforcement, by M. Jahreis, K. Rautenstrauch.-…