Speaker
Description
As part of a publicly funded interdisciplinary research project at the Stuttgart University of Applied Sciences, the development of an innovative timber-hybrid modular construction system for the creation of affordable housing is being supported in cooperation with the Ed. Züblin AG. The research focuses on logistics, the application of BIM for sustainable constructions, climate control systems, building physics and acoustics. The modular construction system is characterised by the separation into a primary and a secondary structure. The primary load-bearing structure consists of reinforced concrete columns, in which prefabricated modules are suspended as the secondary structure. Each module consists of a reinforced concrete ribbed floor as well as walls and ceilings manufactured using a novel timber plug-in system. The individual components of this system are cut from plywood sheets using a CNC machining centre and joined together with precision via milled tenons and mortises. As the project progresses, a demonstrator consisting of five modules across three storeys will be constructed on the university campus for use as a real-world laboratory for the various research disciplines. Preliminary extensive investigations of the airborne and impact sound insulation as well as some additional structure-borne sound measurements, e.g. vibration reduction index, were carried out on a mock-up consisting of two modules arranged both side by side and one above the other. Furthermore, the use of elastic interlayers to decouple the modules of the support brackets was investigated to the reduce structure-borne sound transmission. The article presents the current status of the building acoustic measurements.