Download or read book Glass Fiber Reinforced Glued Laminated Wood Beams written by Alfred B. Dorey and published by . This book was released on 1996 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a previous investigation showed that the use of glass fibre reinforcement in laminated wood beams should be investigated in detail. This report describes a subsequent research project that investigated the improvement in mechanical properties of laminated wood specimens with glass fibre reinforcing. Specifically, the project evaluated the strength & stiffness enhancement of beam specimens by comparing the properties of reinforced and unreinforced beams. The test program studied specimens reinforced with glass fibre along the extreme tension wood fibre at varying amounts of fibre or fibre fractions; specimens with similar fibre fractions, but reinforced along both the extreme tension wood fibre and the extreme compression wood fibre; specimens with a different base size of laminated beam to determine sizing effects, if any; and specimens exposed to adverse environmental conditions to determine the effectiveness of the reinforcing systems to environmental exposure. In addition, a model was developed to predict the failure load of the reinforced specimens. Model predictions are compared to the experimental results.

Download or read book Glass Fiber Reinforced Glued Laminated Wood Beams written by Alfred Boyd Dorey and published by . This book was released on 1996 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strength and Stiffness of Reinforced Yellow poplar Glued laminated Beams written by and published by . This book was released on 1997 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In bridge applications, it is often necessary to minimize the depth of the bridge structure to provide for the required hydraulic opening or reduce the volume of approach fill. For bridges that utilize structural glued-laminated (glulam) timber beams as stringers, reinforcement using thin strips of pultruded E-glass-fiber-reinforced plastic (GFRP) composites may permit reduced depth, because the reinforcement has the potential to increase stiffness and strength. This study is part of an overall effort aimed at evaluating the potential for commercial production of glulam-GFRP beams in current wood laminating plants and a wood adhesive compatible with existing equipment. Twelve Yellow-Poplar glulam GFRP beams were commercially manufactured, and their performance was evaluated. The GFRP panels were bonded to the wood with a resorcinol formaldehyde adhesive to provide the reinforcement. The simplicity of the process used to manufacture the test beams indicates that the commercial production of glulam-GFRP beams is feasible. Increases of 18 percent in stiffness and 26 percent in strength were achieved by adding 3 percent of GFRP by volume. The bending strength values of the beams predicted by the ASTM D3737 procedure correlate well with the experimental values. However, the observed delamination of the reinforcement indicates that improved bonding strength of wood--GFRP interfaces is needed. Results of this study will be useful to manufacturers interested in improving the performance of glulam timber beams.

Download or read book The Stress strain Relationships in Wood and Fiber reinforced Plastic Laminae of Reinforced Glued laminated Wood Beams written by Daniel Arthur Tingley and published by . This book was released on 1996 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reinforcement of wood and wood composite structural products to improve their mechanical properties has been in practice for many years. Recently, the use of high-strength fiber-reinforced plastic (FRP) as a reinforcement in such applications has been commercialized. The reinforcement is manufactured using a standard pultrusion process or alternatively a sheet-forming process commonly referred to as "pulfonning". The high-modulus fibers are predominately unidirectional, although off-axis fibers are often used to enhance off-axis properties. The fibers used are either of a single type or multiple types, which are called "hybrids". Unidirectional, single, and hybrid fiber FRP physical properties and characteristics were compared to wood. Full-scale reinforced glulams were tested. Aramid-reinforced plastics (ARP) used as tensile reinforcements were found to be superior in strength applications to other types of FRP made with fiber, such as carbon and fiberglass. Carbon/aramid-reinforced plastic (CARP) was shown to be superior in both modulus and strength design situations. Fiberglass was shown to be suitable only in hybrid situations with another fiber such as aramid or carbon and only in limited use situations where modulus was a design criteria. The testing and analysis showed that the global response of reinforced glulam beams is controlled by localized strength variations in the wood such as slope of grain, knots, finger joints, etc. in the tensile zone. The elemental tensile strains in the extreme wood tensile laminae, due to global applied loads, were found to be well below the strain at failure in clear wood samples recovered from the failure area. Two areas affecting the relationship between the wood and the FRP were investigated: compatibility of the wood and FRP materials and interface characteristics between the wood and FRP. The optimum strain value at yield point for an FRP was assessed to be slightly higher than the clear wood value in tension for a species/grade to be reinforced. The effects of localized strength variations in the tensile wood laminae adjacent to the FRP were found to be the predominate cause of failure in frill-scale reinforced glulams with less than 1.5% by cross section reinforcement.

Download or read book Design criteria for large structural glued laminated timber beams using mixed species of visually graded lumber written by Russell Charles Moody and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improved Utilization of Lumber in Glued Laminated Beams written by Russell Charles Moody and published by . This book was released on 1977 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Efficient Utilization of Red Maple Lumber in Glued laminated Timber Beams written by John J. Janowiak and published by . This book was released on 1995 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Green Infrastructure written by Rohana Hassan and published by Springer Nature. This book was released on 2021-12-05 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the meaning of green infrastructure and its concerns to the contribution of materials and applications. It explores the evolving contested material under “green infrastructure” covering timber, concrete, soil, and pavement. It discusses the resistance to the ambiguity of managing the construction of green infrastructure and drawing on wider debates around applications and processes on construction. These contributions are by no means definitive, but rather an attempt to provide a detached and holistic perspective on the engineering “green infrastructure” concept.

Download or read book Economic Analysis of Fiber reinforced Polymer Wood Beams written by Noel D. Stevens and published by . This book was released on 2000 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response Evaluation of Yellow poplar Glulam Beams Reinforced with Pultruded Glass fiber Reinforced Plastic written by and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fabrication and Design of Glued Laminated Wood Structural Members written by Alan D'Yarmett Freas and published by . This book was released on 1954 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reinforcement of Timber Elements in Existing Structures written by Jorge Branco and published by Springer Nature. This book was released on 2021-04-30 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: By presenting the work of the RILEM Technical Committee 245-RTE, the book provides an overview of the existing techniques for the reinforcement of timber elements, joints and structures. It consists of two parts: part I examines state-of-the-art information on reinforcement techniques, summarizes the current status of standardization, and covers STS, GiR, FRP and nanotechnology. In part II several applications of reinforcement are discussed: these include traditional structures, traditional timber frame walls, light-frame shear walls, roofs, floors, and carpentry joints. The book will benefit academics, practitioners, industry and standardization committees interested in the reinforcement of existing timber elements, joints and structures.

Download or read book Delamination in Wood Wood Products and Wood Based Composites written by Voichita Bucur and published by Springer Science & Business Media. This book was released on 2010-11-02 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last quarter century, delamination has come to mean more than just a failure in adhesion between layers of bonded composite plies that might affect their load-bearing capacity. Ever-increasing computer power has meant that we can now detect and analyze delamination between, for example, cell walls in solid wood. This fast-moving and critically important field of study is covered in a book that provides everyone from manufacturers to research scientists the state of the art in wood delamination studies. Divided into three sections, the book first details the general aspects of the subject, from basic information including terminology, to the theoretical basis for the evaluation of delamination. A settled terminology in this subject area is a first key goal of the book, as the terms which describe delamination in wood and wood-based composites are numerous and often confusing. The second section examines different and highly specialized methods for delamination detection such as confocal laser scanning microscopy, light microscopy, scanning electron microscopy and ultrasonics. Ways in which NDE (non-destructive evaluation) can be employed to detect and locate defects are also covered. The book’s final section focuses on the practical aspects of this defect in a wide range of wood products covering the spectrum from trees, logs, laminated panels and glued laminated timbers to parquet floors. Intended as a primary reference, this book covers everything from the microscopic, anatomical level of delamination within solid wood sections to an examination of the interface of wood and its surface coatings. It provides readers with the perspective of industry as well as laboratory and is thus a highly practical sourcebook for wood engineers working in manufacturing as well as a comprehensively referenced text for materials scientists wrestling with the theory underlying the subject.

Download or read book Large Glued laminated Timber Beams with Two Grades of Tension Laminations written by Billy Bohannan and published by . This book was released on 1969 with total page 48 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 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reinforced Glued laminated Wood Beams written by Daniel Arthur Tingley and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natural Fibres and their Composites written by Vincenzo Fiore and published by MDPI. This book was released on 2021-04-01 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last decades, natural fibers have received growing attention as alternatives to synthetic materials for the reinforcement of polymeric composites. Their specific properties, low price, health advantages, renewability and recyclability make natural fibers particularly attractive for these purposes. Furthermore, natural fibers have a CO2-neutral life cycle, in contrast to their synthetic counterparts. However, natural fibers are also widely known to possess several drawbacks, such as a hydrophilic nature, low and variable mechanical properties, poor adhesion to polymeric matrices, high susceptibility to moisture absorption and low aging resistance. Therefore, extensive research has been conducted on natural fiber-reinforced composites in the last 20 years. In this context, this book presents several interesting papers concerning the use of natural fibers for the reinforcement of polymer-based composites, with a focus on the evaluation of their mechanical performances, ballistic properties, rheological behavior, thermal insulation response and aging resistance in humid or aggressive environments.