Download or read book Load carrying Capacity and Failure Mode Analysis of Timber Rivet Connections written by Pouyan Zarnani and published by . This book was released on 2013 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Different brittle, mixed and ductile failure modes of timber connections have long been observed by wood researchers. The wood engineering community has dedicated a significant amount of effort over the last decades to establish a reliable predictive model to determine the capacity of timber connections under different failure modes, particularly, for wood failure mechanisms. The present study focuses on timber rivet connections. In the analytical model developed for the wood block tear-out resistance under parallel to grain loading, the stiffness and strength of the resisting planes subjected to non-uniform shear and tension stresses are taken into account. For the wood splitting resistance under perpendicular to grain loading, the presented design method takes into account the observed two possible wood failures; either partial or full width splitting. A design procedure is presented which allows the designer to calculate the resistances associated with the predictions of the potential brittle, ductile and mixed failure modes. The effective wood thickness for the brittle failure mode is derived and related to the elastic deformation of the fastener. In the case of mixed failure mode (a mixture of brittle and ductile), the wood effective thickness depends on the governing ductile failure mode of the fastener. The fastener failing resistance under yielding and ultimate limit states are determined using the relevant wood embedment strength and the fastener moment capacity. In the proposed analytical models for the prediction of wood strength under longitudinal and transverse loadings, the effect of geometry parameters such as number of fastener rows and columns, spacing along and across the grain, fastener penetration depth, loaded and unloaded edge distances, end distance, and member thickness are considered. The design approach presented is verified using an extensive testing regime conducted on riveted joints under parallel and perpendicular to grain loadings on New Zealand Radiata Pine laminated veneer lumber (LVL) and glulam and the test data from the literature. This improved design approach gives the practitioners the ability to predict the connection ultimate capacity and its failure mode more accurately than the methods used in EC5 and CSA O86. The proposed design approach can be extended to other dowel-type fasteners such as nails, screws and bolts.
Download or read book Timber Rivet Connections in U S Domestic Species written by Marshall Begel and published by . This book was released on 2004 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper discusses results of tests conducted to expand the data base on the performance of timber rivet connections in U.S. domestic species to verify existing and proposed design procedures. Eight-, 80-, and 200-rivet connections were tested. The 8-rivet joint tests illustrate the effects of material type, rivet length, and load direction on the behavior of rivet?connections when gross wood failures are avoided. The 80-rivet connections, loaded perpendicular to grain, show the effect of rivet spacing as well as test support conditions on failure mode and strength. The 200-rivet joints, with load applied parallel to grain, provide data for previously reported failure modes, including the rivet yield/wood crush modes modeled by European yield model (EYM) and gross wood failures. The 200-rivet tests also show the effect of rivet spacing on joint strength and failure mode. The tests were conducted in two phases. In Phase I, small?specimens were made from Southern Pine and ponderosa pine solid sawn lumber, Hem-Fir and Southern Pine glulam, and parallel strand lumber. The small specimens failed by a combination of rivet yielding and wood crushing as described by EYM, rather than by a gross failure of the wood block. Joint yield load was determined by fitting test data to a curve and finding the load at 5% offset displacement. Basic trends can be seen in the data, but yield load is a poor predictor of ultimate load. In Phase II, large specimens were made from Southern Pine glulam. Larger rivet spacing, wider specimens, and longer rivets generally increased joint capacity; end spacing had no significant effect. Short continuously supported beams had a higher capacity load than did longer simply supported beams. The results show that when wood failure modes occur, thicker glulam has higher capacity, contradicting the size effect of the design code.
Download or read book Handbook of Materials Failure Analysis With Case Studies from the Construction Industries written by Abdel Salam Hamdy Makhlouf and published by Butterworth-Heinemann. This book was released on 2018-04-27 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Materials Failure Analysis: With Case Studies from the Construction Industry provides a thorough understanding of the reasons materials fail in certain situations, covering important scenarios including material defects, mechanical failure due to various causes, and improper material selection and/or corrosive environment. The book begins with a general overview of materials failure analysis and its importance, and then logically proceeds from a discussion of the failure analysis process, types of failure analysis, and specific tools and techniques, to chapters on analysis of materials failure from various causes. Failure can occur for several reasons, including: materials defects-related failure, materials design-related failure, or corrosion-related failures. The suitability of the materials to work in a definite environment is an important issue. The results of these failures can be catastrophic in the worst case scenarios, causing loss of life. This important reference covers the most common types of materials failure, and provides possible solutions. Provides the most up-to-date and balanced coverage of failure analysis, combining foundational knowledge and current research on the latest developments and innovations in the field Offers an ideal accompaniment for those interested in materials forensic investigation, failure of materials, static failure analysis, dynamic failure analysis, and fatigue life prediction Presents compelling new case studies from key industries to demonstrate concepts and to assist users in avoiding costly errors that could result in catastrophic events
Download or read book Materials and Joints in Timber Structures written by Simon Aicher and published by Springer Science & Business Media. This book was released on 2013-09-25 with total page 815 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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, being I) Structures II) Mechanical Connections III) Glued Joints and Adhesives IV) Timber and Concrete/Cement/Polymer Composites V) Cyclic, Seismic Behavior VI) Hardwood, Modified Wood and Bamboo VII) Cross-Laminated Timber VIII) Properties and Testing of Wood IX) Glulam
Download or read book Timber fasteners a study on input parameters for the design of timber joints written by Sandhaas, Carmen and published by KIT Scientific Publishing. This book was released on 2024-05-13 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current design rules for timber joints with dowel-type fasteners require input parameters such as yield moment and withdrawal capacity, which are determined within the European framework of certification testing. Databases containing these data were assembled. A large scatter was observed. Bespoke series may deliver clear trends. If representative data is considered, these clear trends vanish. Globally valid regression equations are conservative leading to incorrect prediction of failure modes.
Download or read book PRO 22 International RILEM Symposium on Joints in Timber Structures written by Simon Aicher and published by RILEM Publications. This book was released on 2001 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Connections in Timber Structures written by Thomas K. Bader and published by . This book was released on 2018 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Determination of the strength parameters needed to determine the load-carrying capacity of a single dowel-type fastener and on the load distribution among fasteners in a group as well as methods to avoid brittle failure modes in the timber around the fastener or group of fasteners. Also ease of use has been addressed. The design of carpentry joints is dealt with, too, as such connections now can take advantage of the precision of modern wood working." -- introducció.
Download or read book Canadian Journal of Civil Engineering written by and published by . This book was released on 2003 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper FPL RP written by and published by . This book was released on 1986 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Connections in Timber Structures written by Carmen Sandhaas and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Timber Engineering written by Sven Thelandersson and published by John Wiley & Sons. This book was released on 2003-03-14 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timber construction is one of the most prevalent methods of constructing buildings in North America and an increasingly significant method of construction in Europe and the rest of the world. Timber Engineering deals not only with the structural aspects of timber construction, structural components, joints and systems based on solid timber and engineered wood products, but also material behaviour and properties on a wood element level. Produced by internationally renowned experts in the field, this book represents the state of the art in research on the understanding of the material behaviour of solid wood and engineered wood products. There is no comparable compendium currently available on the topic - the subjects represented include the most recent phenomena of timber engineering and the newest development of practice-related research. Grouped into three different sections, 'Basic properties of wood-based structural elements', 'Design aspects on timber structures' and 'Joints and structural assemblies', this book focuses on key issues in the understanding of: timber as a modern engineered construction material with controlled and documented properties the background for design of structural systems based on timber and engineered wood products the background for structural design of joints in structural timber systems Furthermore, this invaluable book contains advanced teaching material for all technical schools and universities involved in timber engineering. It also provides an essential resource for timber engineering students and researchers, as well as practicing structural and civil engineers.
Download or read book Wood Design Focus written by and published by . This book was released on 1996 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation and Optimization of Connections in Timber Assemblies Subjected to Blast Loading written by Christian Viau and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of research on high strain-rate effects in timber structures has been limited to the study of the load-bearing members in isolation. Limited work has been conducted on timber connections and full-scale timber assemblies under blast loading, and these have generally been constrained to qualitative observations. In North America, the increasing prevalence of mid- and high-rise timber structures makes them susceptible to blast effects. In addition, questions remain on how to design and optimize these timber assemblies, including the connections, against blast loads, due in part to the limitations on comprehensive design provisions. The effects of far-field blast explosions were simulated using the University of Ottawa shock tube. A total of fifty-eight dynamic tests were conducted on connection-level and full-scale specimens. The research program aimed to investigate the behaviour of heavy-timber connections when subjected to simulated blast loads. The experimental results showed that connections with a main failure mechanism consisting of wood crushing experienced significant increases in dynamic peak load when compared to the static peak load. In contrast, connections where steel yielding and rupturing occurred experienced no statistically significant increase in dynamic peak load. Full-scale glulam specimens with bolted connections designed to yield via wood crushing and bolt bending performed better than those with overdesigned connections. Bolted connections which failed in splitting led to premature failure of the glulam assembly. Reinforcement with self-tapping screws allowed these bolted joints to fail in a combination of bolt yielding and wood crushing, and provided more ductility when compared to unreinforced specimens. Specially designed energy-absorbing connections significantly increased the energy dissipation capabilities of the timber assemblies. The basis of these connections was to allow for connection yielding while delaying failure of the wood member. This was achieved via elastoplastic connection behaviour, which effectively limited the load imparted onto the wood member. Based on the experimental results, limitations in the current Canadian blast provisions were highlighted and discussed. A two-degree-of-freedom blast analysis software was developed and validated using full-scale and connection-level experimental results and was found to adequately capture the system response with reasonable accuracy. Sensitivity analyses regarding the applicability of using single-degree-of-freedom analysis were presented and discussed.
Download or read book Analysis of Timber Rivet Connections Loaded Parallel to Grain written by Matthew Russell Marjerrison and published by . This book was released on 2007 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on all of the previous work and extrapolating from work done on bolted connections, a rational approach has been developed at RMC. This new approach is presented and a comparison of the various methods is made while highlighting differences in assumptions and results.
Download or read book Stress Analysis and Design of Gluam Rivet Connections for Perpendicular to Grain Loading of Wood written by R.O. Foschi and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Analysis and Design of Glulam Rivet Connections for Parallel to grain Loading of Wood written by Ricardo O. Foschi and published by vancouver : western forest products laboratory. This book was released on 1973 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geodex Structural Information Service written by Geodex International and published by . This book was released on 1976 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
