Hybrid Cross-Laminated Timber Building Case Study Dynamic Identification Under Forced Vibration Tests

Timber structures have experienced its revival as a viable structural solution lately, especially thanks to its relatively modern engineered version, i.e. the cross-laminated timber (CLT). Nevertheless, timber constructions are still lightweight and, therefore, inherently prone to experiencing vibration issue phenomena. This challenge motivated research trends within this field lately, in particular, to characterize the dynamical characteristics of hybrid structural solutions. This study presents preliminary findings from the dynamic analysis of a hybrid timber-concrete building case study. The research employs operational modal analysis (OMA) using output-only techniques for ambient vibration recordings and Hilbert Huang transforms (HHT) for forced vibration tests performed during construction stages. Finally, the results of a preliminary finite element model (FEM) updating procedure have been discussed. The current findings evidenced that greater research efforts should be demanded in the next years to better understand the vibration coupling phenomena in these hybrid structural typologies.