ABSTRACT
In the low and mid-frequency range, the European standard EN12354-1 provides unreliable results for lightweight structures (Mahn 2007). Instead, analysis can be performed by utilization of a finite-element (FE) model as proposed by, for example, Brunskog and Davidsson (2004) or Løvholt et al. (2011). Recently, Andersen et al. (2012) proposed the use of a modular FE model in which the walls and floors are treated as substructures, leading to a significant reduction of the number of degrees of freedom. This approach is employed in the present paper for dynamic analysis of a four-storey timber building. Especially, the impact of placing additional mass on a dynamically excited floor, or by placing the mass on other floors, has been examined. Further, the influence of the rigidity of connections between walls and floors has been examined. The analyses have been made in the frequency domain within the range 0-250 Hz.
