This paper deals with the comfort properties in a planned 14-storey timber apartment building in Bergen, Norway. The building will be one of the tallest timber buildings in the world. The building consists of load-carrying glulam trusses with two intermediate strengthened levels. The truss carries prefabricated building modules. Herein, the evaluation with respect to dynamic behaviour of the building is described with emphasis on the horizontal acceleration due to wind forces.
"Treet" is a relatively high building with low structural weight. Its natural frequencies lie in the domain where wind can cause annoying motions or nausea. The stiffness and mass properties for glulam and concrete are well known, but poorly described for complex, complete building modules. To get better knowledge of dynamic behaviour of the prefabricated building modules, testing was needed. Based on the structural design and the module testing a FEM analysis model was generated in order to calculate the building's natural frequencies and modal mass. These parameters were used to determine the windinduced accelerations of "Treet".