Stephanskirchen, Germany
Stephanskirchen, Germany

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Schanda U.,Rosenheim University of Applied Sciences | Mayr A.,Rosenheim University of Applied Sciences | Schopfer F.,Rosenheim University of Applied Sciences | Rabold A.,Schallschutzzentrum ift Rosenheim | Bacher S.,Schallschutzzentrum ift Rosenheim
Bauphysik | Year: 2013

Die Altbausanierung nimmt im gesamten Baubereich eine immer bedeutendere Stellung ein. Falls die geplanten Sanierungsmaßnahmen nicht unter den Bestandsschutz von Baudenkmälern fallen, sind die Anforderungen der zum Zeitpunkt der Sanierung baurechtlich eingeführten Normen zu berücksichtigen. Das Bauteil, das bei der Sanierung eine besonders sorgfältige Planung erfordert, ist die Wohnungstrenndecke, die in Altbauten häufig als Holzbalkendecke ausgeführt wurde. Die vorhandenen Planungsgrundlagen für den Schallschutznachweis von Holzbalkendecken sind sowohl in der Normung als auch in der Literatur sehr lückenhaft. Um bessere Planungsdaten zu erhalten, wurde deshalb zunächst ein Forschungsvorhaben [1] durchgeführt, in dem die Luft- und Trittschalldämmung typischer Altbaudecken und deren Verbesserungen durch unterschiedliche Sanierungsmaßnahmen unter Laborverhältnissen ohne Flankenübertragung untersucht wurden. Die Ergebnisse wurden in einem ersten Beitrag [2] veröffentlicht. Im vorliegenden zweiten Beitrag werden die Ergebnisse eines weiteren Forschungsvorhabens [3] vorgestellt. Der Fokus lag hierbei auf der Ermittlung der Flankenübertragung bei unterschiedlichen Mauerwerkstypen und Deckeneinbindungen. Die Ergebnisse werden als Planungsdaten für die Flankenübertragung bei Altbaukonstruktionen dargestellt und die Anwendung des erarbeiteten Rechenmodells sowie die Validierung anhand von Baumessungen erläutert. Sound insulation of timber joist floors - design guidance for building refurbishment projects. Part 2: Flanking transmission. The refurbishment of existing buildings plays an increasing role in the entire construction industry. If projected refurbishment actions are not subject to official listed building or monument requirements, then the relevant requirements will be those listed in the current building standards. The refurbishment of one particular structural element requires especially careful planning: the horizontal partition between apartments, which in old buildings often comprises a timber beam floor. There are major gaps in the current knowledge used to plan the acoustic properties of such floors, in both the standards and literature. In order to generate better planning data, an initial research project [1] investigating insulation against both airborne and impact sound was carried out for typical floor constructions in old buildings. Improvements to the acoustic insulation of such floors using a variety of refurbishment measures were tested under laboratory conditions, (not including flanking transmission). The results were published as Part 1 [2]. The present Part 2 describes the results of a subsequent research project [3] focused on investigating flanking transmission in various wall/floor combinations. The results are presented as planning data for flanking transmission in constructions within old buildings. An explanation is provided of how the calculation model compiled was applied, and how it was validated using measurements from old buildings. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Rabold A.,Schallschutzzentrum ift Rosenheim | Bacher S.,Schallschutzzentrum ift Rosenheim | Schanda U.,Rosenheim University of Applied Sciences | Mayr A.,Rosenheim University of Applied Sciences | Schopfer F.,Rosenheim University of Applied Sciences
Bauphysik | Year: 2013

Sound insulation of wood beam ceilings - design guidance for building refurbishment projects, part I: Direct sound insulation. The restoration of existing buildings plays an increasing role in the construction industry. If projected remedial actions are not subject to preservation requirements, then the relevant requirements to be applied are those listed in the current building standards. One structural element that requires an especially careful planning is the vertical partition between apartments, which often comprises of a timber beam floor construction. The current knowledge for the planning of the acoustic properties is insufficient, both in the standards as in literature. In order to close this gap, a research project was carried out at the ift Rosenheim, in which insulation against airborne as well as impact sound was tested for typical floor constructions in existing old buildings. Also a variety of remedial actions to improve the acoustic insulation were tested under laboratory conditions (not including flanking transmission) [1] [2]. A subsequent research project was carried out in collaboration with the University of Applied Sciences Rosenheim to investigate flanking transmission for various types of connections of the masonry wall with the floor. The present article describes the influence of the floor construction on the acoustic insulation and the generation of numbers for acoustic planning parameters concerning the direct transmission of sound via the floor. A subsequent article will address the issue of planning data for the flanking sound transmission. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

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