Finite element analysis of a light-frame wood panelized gable roof: Fid-Bau Portal

Finite element analysis of a light-frame wood panelized gable roof

Islam, Md Saiful / Chui, Ying Hei

Abstract This paper presents a three-dimensional (3D) finite-element analysis of a light-frame wood panelized gable roof. The study developed equivalent macro elements representing the major roof components, such as the roof panel and support wall, in the finite-element model (FEM) by utilizing analytical models of the diaphragm and shear wall of CSA 086–19. The most critical load response of the panelized roof structure was obtained by considering the governing load cases, including the partial load case for snow load. The load path analysis revealed that the panelized roof had a two-way load distribution due to the deep beam action of the support wall. The gable ends of the roof carry approximately one-third of the load. In the gravity load case, the in-plane shear governed the connection design at the eave and support wall lines. Self-tapping screws were very effective in resisting wind uplift forces due to their high withdrawal capacity. Furthermore, the deflection pattern of the ceiling joist revealed the effect of panelized construction on the load path.

Highlights • A holistic design enables the light-frame wood gable roof components to be fabricated using the existing production line. • A three-dimensional (3D) finite-element analysis of a light-frame wood panelized gable roof is presented. • Developed equivalent macro elements representing the major roof components. • The panelized gable roof had a two-way load distribution due to the deep beam action of the support wall. • The deflection pattern of the ceiling joist revealed the effect of panelized construction on the load path.