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

The double-step joint is among the most frequently used layouts, within carpentry joints, for transmitting higher forces that would allow a single notch. They are especially effective in heavy timber structures. Nowadays, computer-aided manufacturing is being used more often, demanding further progr...

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Bibliographic Details
Published in:Materiales de construcción (Madrid) Vol. 69; no. 335; pp. 196 - e196
Main Authors: Villar-García, J. R., Vidal-López, P., Crespo, J., Guaita, M.
Format: Journal Article
Language:English
Published: Madrid Consejo Superior de Investigaciones Científicas 2019
Subjects:
CAM
Carpentry
Computer aided manufacturing
Computer simulation
Cross-sections
deformation
Failure analysis
Glulam
Load
Mechanical properties
method of finite elements
modelization
Propagation
Reduction
Shear strength
Shear stress
Simulation
Strain gauges
Stress concentration
Stress distribution
Stress state
wood
Modelización
Deformation
Wood
Method of finite elements
Análisis de elementos finitos
Propiedades mecánicas
Deformación
Mechanical properties
Modelization
Madera
ISSN:0465-2746, 1988-3226
Online Access:Get full text
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Summary:The double-step joint is among the most frequently used layouts, within carpentry joints, for transmitting higher forces that would allow a single notch. They are especially effective in heavy timber structures. Nowadays, computer-aided manufacturing is being used more often, demanding further progress in its understanding. The conventional design of these joints is conducted by using simplifying assumptions, in particular regarding the shear stress distribution. This is overcome by the use of strength reduction coefficient, which is currently under study. Numerical simulation and experimental tests were carried out with heavy timber cross-sections for rafter to tie-beam truss joint. They were manufactured in glue-laminated timber owing to the large cross-sections tested. Experimental load-strain and load-displacement diagrams were compared with numerical results. This allowed observing the great shear stress concentration produced in the failure by shear crack, which suggests the application of conservative shear strength reduction coefficients.
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ISSN:0465-2746
1988-3226
DOI:10.3989/mc.2019.00319