System behaviour of wood truss assemblies

Abstract

Wood truss assemblies are widely used in light frame construction all over the world. Although the volume of literature on single trusses and joints is relatively huge, the system behaviour of truss assemblies has received only limited attention. The main approach to take into account the system behaviour of an assembly is to use a system factor in the design of single trusses. However, technical advances now make it possible to analyse and design these complex assemblies as systems using three-dimensional structural analysis programs, thereby including the system effect directly. This paper presents an overview of previous research on system behaviour of truss assemblies and recommends a system design approach to designing truss assemblies.

Analysis of Metal Plate Connected Wood Truss Assemblies under Out-of-Plane Loads

“…The behavior of individual trusses has been investigated in research papers in the past (Gupta et al 1996) and system behavior of wood truss assemblies was not previously studied. To model the actual behavior of MPCWTs, a system design procedure (SDP) should be used which analyzes an assembly as a system and considers system behavior directly (Gupta 2005). The use of structural analysis software and three-dimensional (3D) analysis with actual geometry and construction conditions were recommended (Gupta 2005).…”

“…To model the actual behavior of MPCWTs, a system design procedure (SDP) should be used which analyzes an assembly as a system and considers system behavior directly (Gupta 2005). The use of structural analysis software and three-dimensional (3D) analysis with actual geometry and construction conditions were recommended (Gupta 2005). The truss analog in the assembly and the geometry of roof system were influential parameters in the behavior of the real truss assembly; not exclusive or comparative of the variation in the individual member properties (Gupta 2005 net lateral restraining force to brace multiple webs or chords was determined with one or more continuous lateral bracing (CLBs).…”

“…The use of structural analysis software and three-dimensional (3D) analysis with actual geometry and construction conditions were recommended (Gupta 2005). The truss analog in the assembly and the geometry of roof system were influential parameters in the behavior of the real truss assembly; not exclusive or comparative of the variation in the individual member properties (Gupta 2005 net lateral restraining force to brace multiple webs or chords was determined with one or more continuous lateral bracing (CLBs). Furthermore, a methodology for the permanent bracing design using a combination of lateral and diagonal braces was developed.…”

“…Usually, in research papers, differences below 5-6% between results of experimental and modeling outcomes were considered as appropriate validation results (Gupta 2005). Therefore, in this paper to consider the results of the validation as appropriate, ± 5% tolerance for the deflection was considered a good result.…”

Aerodynamic Load Characteristics Evaluation and Tri-Axial Performance Testing on Fiber Reinforced Polymer Connections and Metal Fasteners to Promote Hurricane Damage Mitigation

“…how loads are resisted, transferred, and distributed) of the complete roof system becomes progressively more important (Gupta 2005). There are different ways that a residential structure can fail under the extreme wind loads associated with tropical cyclones and hurricanes.…”