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Author: Marshall Begel
Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 20
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Book Description
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.
Author: Marshall Begel
Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 20
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Riveted joints
Languages : en
Pages : 15
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Book Description
Author:
Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 248
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 44
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Book Description
Author: Thomas Lee Wilkinson
Publisher:
ISBN:
Category : Dowels
Languages : en
Pages : 14
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Book Description
Author: Dan L. Wheat
Publisher:
ISBN:
Category : Building, Wooden
Languages : en
Pages : 372
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Book Description
Author: American Forest & Paper Association
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 176
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Book Description
The ASD/LRFD Manual contains design information for structural lumber, glued laminated timber, structural-use panels, shear walls and diaphragms, poles and piles, I-joists, structural composite lumber, metal plate connected wood trusses, and pre-engineered metal connectors. Over 40 details are included in the chapter on connections. A comprehensive chapter on fire design includes fire rated wall and floor assemblies for solid sawn lumber, I-joists, and trusses.
Author: Simon Aicher
Publisher: Springer Science & Business Media
ISBN: 9400778112
Category : Technology & Engineering
Languages : en
Pages : 815
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Book Description
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
Author:
Publisher:
ISBN:
Category : Lumber trade
Languages : en
Pages : 1258
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Book Description
Author: Erol Karacabeyli
Publisher:
ISBN: 9780864885531
Category : Engineered wood construction
Languages : en
Pages :
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Book Description
