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Glass Fiber Reinforced Glued Laminated Wood Beams
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Book Synopsis Glass Fiber Reinforced Glued Laminated Wood Beams by : Alfred B. Dorey
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.
Book Synopsis Glass Fiber Reinforced Glued Laminated Wood Beams by : Alfred Boyd Dorey
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:
Book Synopsis Strength and Stiffness of Reinforced Yellow-poplar Glued-laminated Beams by :
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.
Book Synopsis The Stress-strain Relationships in Wood and Fiber-reinforced Plastic Laminae of Reinforced Glued-laminated Wood Beams by : Daniel Arthur Tingley
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.
Book Synopsis Design criteria for large structural glued-laminated timber beams using mixed species of visually graded lumber by : Russell Charles Moody
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:
Book Synopsis Green Infrastructure by : Rohana Hassan
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.
Book Synopsis Improved Utilization of Lumber in Glued Laminated Beams by : Russell Charles Moody
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:
Book Synopsis Efficient Utilization of Red Maple Lumber in Glued-laminated Timber Beams by : John J. Janowiak
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:
Book Synopsis Economic Analysis of Fiber-reinforced Polymer Wood Beams by : Noel D. Stevens
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:
Book Synopsis Response Evaluation of Yellow-poplar Glulam Beams Reinforced with Pultruded Glass-fiber Reinforced Plastic by :
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:
Book Synopsis Fabrication and Design of Glued Laminated Wood Structural Members by : Alan D'Yarmett Freas
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:
Book Synopsis Reinforcement of Timber Elements in Existing Structures by : Jorge Branco
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.
Book Synopsis Efficient Utilization of Red Maple Lumber in Glued-laminated Timber Beams by : John J. Janowiak
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 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The feasibility of utilizing cant-sawn hardwood lumber, which would not usually be desired for furniture manufacture, was studied for the manufacture of structural glued-laminated (glulam) timber. Two red maple beam combinations were evaluated: (1) a glulam combination designed with E-rated lumber in 25 percent of the outer laminations (top and bottom) and No. 3 grade lumber in 50 percent of the center laminations and (2) a wide-width glulam combination with laminations made from nominal 2- by 4- and 2- by 6-in. No. 2 grade lumber laid edge-to-edge having staggered end joints (termed 2 by 4/2 by 6 glulam combination). Test results of 42 red maple glulam beams showed that it was feasible to develop structural glulam timber from cant-sawn lumber. The glulam combinations made from E-rated lumber exceeded the target design bending stress of 2,400 lb/in2 and met the target modulus of elasticity (MOE) of 1.8 Ã 106 lb/in2. In addition, the 2 by 4/2 by 6 glulam combination exceeded published design stresses for vertically laminated bending strength, MOE in both the horizontally and vertically laminated orientations, and horizontal shear stress in the vertically laminated orientation. Based on the results of the 2 by 4/2 by 6 glulam combination, it was determined that edge gluing the laminations to form wide-width lumber is not required to achieve targeted strength and stiffness levels. Data analysis showed that ASTM D3737 procedures developed for softwood species accurately predict beam stiffness and provide conservative bending and horizontal shear strength estimates for red maple glulam beams. Also, it was shown that results from ASTM D143 shear-block tests could be used to accurately predict horizontal shear strength of 2 by 4 and 2 by 6 red maple glulam beams.
Book Synopsis Large Glued-laminated Timber Beams with Two Grades of Tension Laminations by : Billy Bohannan
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:
Book Synopsis Reinforced Glued-laminated Wood Beams by : Daniel Arthur Tingley
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:
Book Synopsis Flexural Strengthening of Glued Laminated Timber Beams with Steel and Carbon Fiber Reinforced Polymers by :
Download or read book Flexural Strengthening of Glued Laminated Timber Beams with Steel and Carbon Fiber Reinforced Polymers written by and published by . This book was released on 2007 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composites Institute's, International Conference Proceedings by : Spi/Ci
Download or read book Composites Institute's, International Conference Proceedings written by Spi/Ci and published by CRC Press. This book was released on 1999-05-12 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
