Multipanel CLT shearwalls: an analytical methodology to predict the elastic-plastic behaviour

Despite the significant contributions made to the topic of multipanel cross laminated timber (CLT) shearwalls, a comprehensive analytical model that can accurately predict the non-linear behaviour of the walls is still unavailable. In the current study, an analytical procedure is presented to describe the elastic-plastic behaviour of CLT shearwalls subjected to lateral loads. The aim is to derive expressions that enable the development of complete force-displacement curves for the CLT shearwalls. The proposed analytical model is found capable of predicting the ultimate strength and lateral displacement of the wall. It was shown that the Coupled-Panel behaviour (i.e. each panel is contact with the ground and can rotate as a single panel) was controlled by the yielding of the vertical joints prior the yielding of the hold-down whereas the opposite was valid for the case of Single-Wall behaviour (i.e. the wall works similarly to a monolithic wall). The analytical model is verified using a suitable numerical model. The current research effort lays the groundwork for developing simplified and accurate design requirements.