Pushover analysis of a 12-storey cross-laminated timber building [Elektronski vir]
Naumovski, Luka ...
Due to recent developments in net-zero policy, 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 whether a seismically inadequate 12-storey residential building from the 1960s can be replaced with a 12-storey 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. The CLT shear walls are modelled as elastic orthotropic shell elements and the various connections (wall-to-foundation and wall-to-floor) as nonlinear spring-link elements. The model is expanded in the second step to the entire structure and analysed using the basic and extended N2 method and displacement-based design (DBD). Response and seismic behaviour are assessed by analysing 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 considered also for regions with moderate seismic risk, such as Ljubljana.
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