2nd Croatian Conference on Earthquake Engineering 2CroCEE

Due to recent developments in net-zero policy, the cross-laminated timber (CLT) structures, with their low carbon footprint and potential competitiveness with steel and concrete structures, have gained popularity and are also considered in earthquake-prone regions. The present study analyses if an existing seismically inadequate 12-story residential building from the 1960s can be replaced with a 12-story platform-type CLT building. The structural model is developed in two steps. In the first step, a nonlinear model of a single shear wall is calibrated against experiments and data from the literature. In the model, the CLT shear walls are modelled as elastic orthotropic shell elements and the various connections (wall-foundation and wall-floor) as nonlinear spring-link elements. The model is expanded in the second step to the entire structure and analysed using basic and extended N2 methods and displacement-based design (DBD) to evaluate the adequacy of the response and seismic behaviour with respect to global and local limit states. The critical results of the analyses reveal large lateral displacements and local failures of connections. Based on the nonlinear analysis and the assumptions used in the model, it is demonstrated that a multi-story CLT platform-type building could be safely constructed also in regions with moderate seismic risk, such as Ljubljana.