SEA based prediction for integrated vibro-acoustical design optimization of multi-storey buildings

Invited paper

Andreas Rabold

University of Applied Sciences Rosenheim

Monday 1 june, 2015, 11:20 - 11:40

Auditorium 2 (592)

Timber buildings have been pioneering building constructions in terms of energy conservation and resource efficiency. Low-energy-consumption or so called passive-houses built of timber are known to combine an environmentally-friendly construction principle with high expectations on aesthetics and modern architecture. Compared to similar construction projects built in concrete the design of a multi-storey building in timber construction is more demanding and challenging to the architect and construction engineer. Reasons for this are tougher requirements on fire safety regulations in these buildings as well as the absence of sufficient realized examples and design tools for the proof of performance of vibration control and sound insulation. In order to enable the design of a multi-storey building with respect to the requirements or recommendations for an enhanced acoustic comfort, a collaboration of various experts is required during the design process creating their own individual building models. However, the use of several individual building models often leads to misunderstanding and contradictory elaboration of construction details. A simplification of the design process and the procedure of verification could be achieved if all of the experts involved work on one single CAD based Building Information Model (BIM). In a current project these design tools shall be further developed by using a combination of FEM and SEA for the proof of performance based on the Building Information Model (BIM). The contribution presents first an overview of the used computation models. Then the SEA based method according to EN 12354 and the needed input data are focused. Therefore coupling loss factors of several junctions build with massive wood elements were measured and design values for the vibration reduction index sampled. The influence of the structural reverberation time to the accuracy of the propagation was proofed and different single value methods (D<sub>v,ij,n</sub>, K<sub>ij</sub>, K<sub>ij,junction</sub>) were compared.

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