Gianfranco Quartaruolo

Overview of how the design of headquarter buildings has changed over the last 50 years

Estimation of the airborne insulation of vertical partitions, evaluated from the performance of basic components according to standardized prediction models, does not provide satisfactory results when applied to walls made of Cross-Laminated Timber (CLT) elements. In this article, the results of laboratory measurements, independently carried out by various researchers on similar CLT structures, are shown. The purpose of this study is to identify the empirical spectrum of the sound reduction… Visualizza altro

Estimation of the airborne insulation of vertical partitions, evaluated from the performance of basic components according to standardized prediction models, does not provide satisfactory results when applied to walls made of Cross-Laminated Timber (CLT) elements. In this article, the results of laboratory measurements, independently carried out by various researchers on similar CLT structures, are shown. The purpose of this study is to identify the empirical spectrum of the sound reduction index of a reference wall made according to CLT technology, in order to provide a simple and useful tool to estimate the noise insulation performance of this type of building element. Meno dettagli

Typically in the New Zealand residential market, concrete floor systems with lightweight walls are the preferred construction method. As floor slabs become progressively thinner, what consistently effects the achievement of the airborne acoustic design targets between adjacent residential units is the noise flanking transmission through the floor.
A solution to limiting flanking is identified in this paper for when is not possible to have a slab of sufficient overall thickness, or when a… Visualizza altro

Typically in the New Zealand residential market, concrete floor systems with lightweight walls are the preferred construction method. As floor slabs become progressively thinner, what consistently effects the achievement of the airborne acoustic design targets between adjacent residential units is the noise flanking transmission through the floor.
A solution to limiting flanking is identified in this paper for when is not possible to have a slab of sufficient overall thickness, or when a floating floor or floating screed is not a cost effective option. The solution, utilising the introduction of a concrete nib along the wall line, reduces the floor to floor flanking noise transmission and promotes the achievement of better sound insulation ratings onsite.
The objective of the research is to determine whether the scientific prediction method contained within ISO 12354-1:2000 - "Building acoustics - Estimation of acoustic performance in buildings from the performance of elements – Part 1: Airborne sound insulation between rooms" can be adapted to accurately predict the flanking reduction achieved through the introduction of a concrete nib into a heavy-floor/lightweight-wall system. The standard is under review, but from the draft available, the prediction approach for this specific application has not changed and the proposed method in this paper is still valid.
Comparisons of predicted results with several field test results are made to verify the accuracy of the methodology. Incorporating a concrete nib into the wall-floor junction appears to effectively reduce the vibration transmission through the floor slab by introducing a secondary dissipation path for the sound energy running through the floor slab. Meno dettagli