Investigating the in-plane rigid diaphragm conditions of Cross-Laminated Timber floors for seismic design

This paper presents the results of a parametric analysis aimed at defining the in-plane rigid conditions for CLT floor diaphragms. Through a comprehensive literature review and extensive numerical analyses, the conditions ensuring a rigid behaviour of CLT floor diaphragms in CLT platform-type buildings are identified and discussed. The study also examines the influence of geometrical and mechanical parameters used in designing CLT floor components (CLT panels and connections) on i) the distribution of elastic inertia forces among the vertical elements of the SFRS, ii) the relative in-plane deformation of CLT floor diaphragms, and iii) the natural period of CLT platform-type buildings.