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Memorias de investigación
Artículos en revistas:
Long-term bending stress relaxation in timber laths for the structural design of lattice shells
Año:2018
Áreas de investigación
  • Ingeniería civil y arquitectura
Datos
Descripción
Timber lattice shells are multi-layered structures of great interest for medium and long span lightweight solutions in structural and aesthetic terms. They are constructed by bending initially straight laths. This curving process can lead to high initial stresses in the laths and the possibility of overstressing under service loads. However, these initial stresses may decrease over time to acceptable levels due to the stress relaxation phenomenon. The quantification of stress relaxation over the long-term is therefore a key aspect in the structural analysis of lattice shells. Unfortunately, no information is given in the standards and the available experimental data comes from short-term research, so that engineers have to make assumptions which are not properly verified. This work provides experimental results on long-term bending stress relaxation curves of dry Eucalyptus globulus L. laths bent with three different curvature radii (different stress levels) over two years. For this purpose an original test device was developed and used, overcoming the drawbacks of the other devices used to date in most experimental research. Initial bending stresses decreased very quickly during the first weeks of measurements. After two years, the bending stresses fell by from 45% to 66% of their initial values depending on their curvature radii, which implies an important structural reserve recovery.
Internacional
Si
JCR del ISI
Si
Título de la revista
Construction And Building Materials
ISSN
0950-0618
Factor de impacto JCR
4,046
Información de impacto
JCR (2018): Q1 (mitad superior)
Volumen
193
DOI
10.1016/j.conbuildmat.2018.10.224
Número de revista
Desde la página
565
Hasta la página
575
Mes
SIN MES
Ranking
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Participantes
  • Autor: Antonio Jose Lara Bocanegra (UPM)
  • Autor: Maria Almudena Majano Majano (UPM)
  • Autor: Francisco Arriaga Martitegui (UPM)
  • Autor: Manuel Guaita (Universidad de Santiago de Compostela)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Estructuras y Física de Edificación
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