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This study develops an analytical model to describe the behaviour of multi-storey multi-panel CLT shearwalls, specifically accounting for cumulative loads between storeys and the effect of the diaphragm. The analysis considers the contribution of hold-downs, wall-to-floor connections, and panel-to-panel joints, as well as loads transferred from storeys above. The analysis has been developed for shearwalls acting as a series of coupled panels (CP) each individually rotating about a corner. Force transfer between storeys is implemented by distributing reactions through the upper floor diaphragm and a direct force from the upper storey's hold-down. Structuring the equations this way allows for a simplified formulation while including several components of the system's complex behaviour. Two-dimensional finite element modelling is used to verify the accuracy of the developed model.

High-fidelity modelling used to predict the dynamic behaviour in terms of displacement-time history and failure mechanism of heavy timber elements are presented and validated. A material predictive model was implemented in ABAQUS through a dynamic user subroutine using continuum damage mechanics. Full-scale experimental test results were analysed and used to validate the modelling predictions. Compared with the experimental test results, the finite element models simulated the displacement-time histories and overall failure behaviour reasonably well. The accurate prediction of failure modes and overall responses of timber elements, including those with complex properties such as cross-laminated timber, is important to ensure safer designs, and lead to a better overall understanding of the material behaviour when subjected to very short duration loading.