Acoustical vibration characterics of prefabricated panels employed in industrialized construction

Abstract

With the development of industrialized steel construction, new constructive elements have been brought not only to the market, but to the everyday construction site as well and, in this way professionals and users have questioned their efficiency. In respect to vibrations in floors, what can be detected is that floor structures are thinner and a decrease of the mass in the horizontal closing panels and the utilization of new materials and systems have led them to have lower natural frequencies, and so are nearer to the frequencies produced by walking. This decrease of mass of the closing panels also lead to a considerable weakness in terms of acoustical insulation, which can cause unfavorable conditions and discomfort. Thus, it becomes necessary to do detailed studies of the efficiency of the vibration and acoustical performance of the new systems to obtain the characterization and the qualification parameters in order to optimize their use. This study does a comparative evaluation of some kinds of horizontal and vertical closing systems in respect to the vibrational and acoustical insulation performance

Influence of the type of fastening of multi-layered closing panels on the estimate of the sound transmission loss

“…But the choosing of the closing system for an edifice should be carefully made during its design phase because an improper choice may jeopardize the overall efficiency of the building and result in need of future interferences. Given this, it is important to analyze overall performance, including the checking of the thermal, acoustical and luminous comfort provided by the prefabricated panels found on the national market of civil construction (Souza et al, 2007).…”

“…Despite the advantage of being lighter and more quickly erected than the traditional ones, industrialized closing systems have less mass, so their acoustical insulation capacity is questionable, leading to unfavorable comfort conditions (Garcia, 2004;Souza et al, 2007;Roozen et al, 2015).…”