Vista Equipo: Allowable stress design by structural grade for nine plantation woods of Costa Rica

Allowable stress design by structural grade for nine plantation woods of Costa Rica

Costa Rica has several species wood from forest plantations to supply the demand for end-user wood. However, this country does not have allowable stress design for different structural grade for these woods. This paper aims to show the allowable stress design values derived from clear wood for nine...

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Autores Principales:	Moya-Roque, Róger, Gonzáles-Beltrán, Guillermo
Formato:	Artículo
Idioma:	Español
Publicado:	Editorial Tecnológica de Costa Rica 2013
Materias:	Maderas tropicales plantaciones crecimiento rápido grados estructurales resistencia de la madera Costa Rica Tropical wood plantations fast-growth structural grade wood resistance
Acceso en línea:	https://revistas.tec.ac.cr/index.php/kuru/article/view/1589 http://hdl.handle.net/2238/12588

id	RepoTEC12588
recordtype	dspace
spelling	RepoTEC125882021-06-08T22:00:55Z Allowable stress design by structural grade for nine plantation woods of Costa Rica Esfuerzos admisibles de diseño por grado estructural para nueve maderas de plantación de Costa Rica Moya-Roque, Róger Gonzáles-Beltrán, Guillermo Maderas tropicales plantaciones crecimiento rápido grados estructurales resistencia de la madera Costa Rica Tropical wood plantations fast-growth structural grade wood resistance Costa Rica Costa Rica has several species wood from forest plantations to supply the demand for end-user wood. However, this country does not have allowable stress design for different structural grade for these woods. This paper aims to show the allowable stress design values derived from clear wood for nine of plantation species used in commercial reforestation in Costa Rica. The mechanical properties analyzed were: static bending, compression parallel and perpendicular to grain and shear and tension parallel to grain. The results in clear wood specimens showed that Tectona grandis, Terminalia oblonga and Acacia mangium presented the highest values of MOE and MOR in static bending. In compression parallel and perpendicular, T. grandis showed the highest resistance. A. mangium and T. grandis were the plantation species with the highest strength in tension parallel to the grain. A. mangium and Cupressus lusitanica presented the highest values in shear parallel to grain. V. guatemalensis and Bombacopsis quinata showed lower resistance in all measured mechanical properties analyzed. The derivation of allowable stress design was possible to establish three groups of species. Group 1 is composed of A.mangium, T. grandis, T. amazonia and T. oblonga, with the highest allowable stress design. Group 2, with intermediate allowable stress design values, component species Gmelina arborea and C. lusitanica. Group 3 species, with lower allowable values, is grouped of Alnus acuminata, B. quinata and V. guatemalensis. Costa Rica cuenta con madera de varias especies proveniente de plantaciones forestales para abastecer la demanda de madera. Sin embargo, no se tienen los valores de esfuerzos admisibles para grados estructurales de estas maderas. El presente trabajo tiene como objetivo, mostrar los valores de diseño derivados de madera libre de defectos para nueve especies de plantación utilizadas en la reforestación comercial. Los esfuerzos analizados fueron flexión estática, compresión paralela y perpendicular al grano y cortante y tensión paralela al grano. Los resultadosen la madera libre de defectos mostró que Tectona grandis, Terminalia oblonga y Acacia mangium presentaron los más altos valores en MOE y MOR en flexión. En compresión paralela y perpendicular, T. grandis presentó la más alta resistencia, A. mangium y T. grandis fueron las especies con la mayor resistencia en tensión paralela al grano. A. mangium y Cupressus lusitanica mostraron los más altos valores en cortante paralela al grano. Vochysia guatemalensis y Bombacopsis quinata mostraron la resistencia más baja en todas las propiedades medidas. La derivaciónde los esfuerzos de diseño permitió establecer tres grupos de especies. El grupo 1 está formado por Acacia mangium, T. grandis, Terminalia amazonia y T. oblonga con los más altos valores admisibles. El grupo 2, con valores intermedios de valores admisibles, lo componen Gmelina arborea y C. lusitanica. El grupo 3, con los valores admisibles más bajos, compuesto porAlnus acuminata, B. quinata y V. guatemalensis. 2013-12-12 2021-06-08T22:00:55Z 2021-06-08T22:00:55Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://revistas.tec.ac.cr/index.php/kuru/article/view/1589 10.18845/rfmk.v11i26.1589 http://hdl.handle.net/2238/12588 spa https://revistas.tec.ac.cr/index.php/kuru/article/view/1589/1486 application/pdf Editorial Tecnológica de Costa Rica Revista Forestal Mesoamericana Kurú; Vol. 11 Núm. 26 (2014): Enero- Junio 2014; Pág. 1 - 11 2215-2504
institution	Tecnológico de Costa Rica
collection	Repositorio TEC
language	Español
topic	Maderas tropicales plantaciones crecimiento rápido grados estructurales resistencia de la madera Costa Rica Tropical wood plantations fast-growth structural grade wood resistance Costa Rica
spellingShingle	Maderas tropicales plantaciones crecimiento rápido grados estructurales resistencia de la madera Costa Rica Tropical wood plantations fast-growth structural grade wood resistance Costa Rica Moya-Roque, Róger Gonzáles-Beltrán, Guillermo Allowable stress design by structural grade for nine plantation woods of Costa Rica
description	Costa Rica has several species wood from forest plantations to supply the demand for end-user wood. However, this country does not have allowable stress design for different structural grade for these woods. This paper aims to show the allowable stress design values derived from clear wood for nine of plantation species used in commercial reforestation in Costa Rica. The mechanical properties analyzed were: static bending, compression parallel and perpendicular to grain and shear and tension parallel to grain. The results in clear wood specimens showed that Tectona grandis, Terminalia oblonga and Acacia mangium presented the highest values of MOE and MOR in static bending. In compression parallel and perpendicular, T. grandis showed the highest resistance. A. mangium and T. grandis were the plantation species with the highest strength in tension parallel to the grain. A. mangium and Cupressus lusitanica presented the highest values in shear parallel to grain. V. guatemalensis and Bombacopsis quinata showed lower resistance in all measured mechanical properties analyzed. The derivation of allowable stress design was possible to establish three groups of species. Group 1 is composed of A.mangium, T. grandis, T. amazonia and T. oblonga, with the highest allowable stress design. Group 2, with intermediate allowable stress design values, component species Gmelina arborea and C. lusitanica. Group 3 species, with lower allowable values, is grouped of Alnus acuminata, B. quinata and V. guatemalensis.
format	Artículo
author	Moya-Roque, Róger Gonzáles-Beltrán, Guillermo
author_sort	Moya-Roque, Róger
title	Allowable stress design by structural grade for nine plantation woods of Costa Rica
title_short	Allowable stress design by structural grade for nine plantation woods of Costa Rica
title_full	Allowable stress design by structural grade for nine plantation woods of Costa Rica
title_fullStr	Allowable stress design by structural grade for nine plantation woods of Costa Rica
title_full_unstemmed	Allowable stress design by structural grade for nine plantation woods of Costa Rica
title_sort	allowable stress design by structural grade for nine plantation woods of costa rica
publisher	Editorial Tecnológica de Costa Rica
publishDate	2013
url	https://revistas.tec.ac.cr/index.php/kuru/article/view/1589 http://hdl.handle.net/2238/12588
_version_	1796140575173378048
score	12.041432

Allowable stress design by structural grade for nine plantation woods of Costa Rica

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