WIT Press


IMPACTS OF CLIMATIC CHANGES AND CREEP LOADINGS ON THE CRACKED DOUGLAS (PSEUDOTSUGA MENZIESII) TIMBER BEAM IN OUTDOOR CONDITIONS



Price

Free (open access)

Paper DOI

10.2495/CMEM-V5-N6-979-984

Volume

Volume 5 (2017), Issue 6

Pages

5

Page Range

979 - 984

Author(s)

CLAUDE FELDMAN PAMBOU NZIENGUI, ROSTAND MOUTOU PITTI, ERIC FOURNELY & GAËL GODI

Abstract

The Douglas is one of the most used species in France, especially in the Auvergne-Rhone Alpes Regions. This species found in unprotected outdoor environment is a major resource for the wood industry. However, variations in moisture content (MC), relative humidity (HR) and temperature (T) coupled with creep, can weaken its mechanical resistance. The main objective of this work is to study the mechanical behaviour of cracked wood beams under climate changes (T, HR and MC), the long-term loadings and the defects of wood (cracks, knots, orientation of annual rings etc). In this study, the evolutions of the crack length and the crack opening are presented. The results show the influence of climatic changes on the sustainability of timber structures of Douglas beams.

Keywords

climatic changes, crack propagations, douglas