Numerical out-of-plane stability analysis of long span timber trusses with focus on buckling length calculations

•Analytical calculation of the out-of-plane buckling length of top chord as a beam on an elastic foundation.•Numerical simulation of the out-of-plane buckling length of top chord as a beam on an elastic foundation.•Numerical simulation of the out-of-plane buckling length of top chord in a truss mode...

Full description

Saved in:
Bibliographic Details
Published in:Engineering structures 2020-02, Vol.204, p.109670, Article 109670
Main Authors: Sejkot, Petr, Ormarsson, Sigurdur, Vessby, Johan, Källsner, Bo
Format: Article
Language:English
Subjects:
Building codes
Byggteknik
Chemical Engineering
Civil engineering
Computer simulation
Kemiteknik
Lateral instability
Mathematical analysis
Numerical simulations
Punched metal plate fasteners
Reinforcement (structures)
Stability analysis
Stiffness
Structural members
Timber
Timber (structural)
Timber truss structure
Trusses
Wood
Wooden structures
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Analytical calculation of the out-of-plane buckling length of top chord as a beam on an elastic foundation.•Numerical simulation of the out-of-plane buckling length of top chord as a beam on an elastic foundation.•Numerical simulation of the out-of-plane buckling length of top chord in a truss model with battens simplified to the elastic foundation.•Numerical simulation of the out-of-plane buckling length of top chord in a roof model with semi-rigid bracing system of wood.•Nonlinear stress analysis of truss model to define bracing forces in battens. According to the harmonized European design code for timber structures, Eurocode 5, all pitched timber trusses are designed as an in-plane structure, meaning that the bracing systems used are assumed to prevent the out-of-plane failure of the truss if sufficient strength and stiffness are provided. The present paper studies how the stiffness of a wooden bracing system contributes to the out-of-plane stability of a trussed roof structure. Results from numerical simulations indicate that significant bracing forces may occur in compressed structural members for long-span timber structures. As well, the values obtained from the calculations according to Eurocode 5 are occasionally far from the results obtained by numerical simulations.
ISSN:0141-0296
1873-7323
1873-7323
DOI:10.1016/j.engstruct.2019.109670