| Revista: | Maderas : ciencia y tecnología |
| Base de datos: | |
| Número de sistema: | 000544705 |
| ISSN: | 0718-221X |
| Autores: | Nevado, Miguel A. Rz1 Arriaga, Francisco2 Díez, Rafael3 |
| Instituciones: | 1Private consultant, Salamanca. España 2Universidad Politécnica de Madrid, ETS Ingeniería de Montes Forestal y del Medio Natural, Madrid. España 3Ministerio de Economía y Competitividad, INIA, Madrid. España |
| Año: | 2015 |
| Periodo: | Oct |
| Volumen: | 17 |
| Número: | 4 |
| Paginación: | 723-734 |
| País: | Chile |
| Idioma: | Inglés |
| Resumen en inglés | A group of databases making a total of approximately 9300 sawn timber pieces from Spanish coniferous species, tested according to European standards and visually graded mainly according Spanish standards were analyzed. The percentiles ratio 20th/5th of bending strength, modulus of elasticity and density distribution were obtained for different combinations of species and visual stress grade. The Eurocode 5 proposes this percentile ratio by a coefficient k fi which is used to determine the design values of mechanical properties in fire situation. The percentile ratios obtained were compared with the specified value in Eurocode 5 for solid timber (k fi = 1,25). In lower grades of Spanish coniferous timber, this value was overly conservative. A value of k fi of 1,4 seems to be more adequate for the case of the bending modulus of elasticity and 1,4 to 1,5 for the bending strength. It is noted that, in the case of the upper grades, this value should be of 1,3; close to the Eurocode proposal. Furthermore, in the case of density, the value should be of 1,1; hence lower than suggested in the code. |
| Keyword: | Timber, Characterization, Fire situation, Structural reliability, Reference material properties |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
