Analysis of the stress state at the double-step joint in heavy timber structures

  1. J. R. Villar-García
  2. P. Vidal-López
  3. J. Crespo
  4. M. Guaita
Revista:
Materiales de construcción

ISSN: 0465-2746

Año de publicación: 2019

Volumen: 69

Número: 335

Tipo: Artículo

DOI: 10.3989/MC.2019.00319 DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Materiales de construcción

Resumen

Entre las uniones carpinteras, el embarbillado doble es una de las más utilizadas para transmitir cargas superiores a las que permitiría una única entalladura, especialmente interesante para estructuras pesadas. Hoy en día, la fabricación asistida por ordenador ha estimulado su uso, demandando profundizar en su estudio. El diseño convencional de estas uniones se realiza asumiendo supuestos simplificadores, en particular respecto a la distribución de las tensiones tangenciales en el cogote. Derivando en el empleo de factores de penalización de la resistencia, los cuales continúan actualmente en estudio. Se realizaron ensayos con escuadrías propias de cerchas pesadas en configuración par-tirante, empleándose para ello madera laminada. Los gráficos experimentales de carga-deformación y carga-desplazamiento se compararon con la modelización numérica de la unión. Esto permitió apreciar la importante concentración de tensiones tangenciales que se produce en el fallo por rasante, lo que aconseja la aplicación de factores reductores de resistencia a cortante conservadores.

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Información de financiación

The Spanish Government supported this work, research project: AGL2012-39368-C03-01, National R+D+I Plan of the Ministry of Science and Innovation. The authors are grateful to Besteiro Timber Factory for the glulam timber supplied.

Financiadores

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