scholarly journals ANÁLISE DO DESEMPENHO ACÚSTICO DE FACHADAS VENTILADAS DE PORCELANATO À LUZ DA NORMA DE DESEMPENHO: ESTUDO DE CASO EM UM EDIFÍCIO HABITACIONAL EM BRASÍLIA-DF

2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Vamberto Machado dos Santos Filho ◽  
Rosa Maria Sposto ◽  
Lucas Rosse Caldas
Keyword(s):  
Residential Building ◽  
Performance Standard ◽  
Sound Insulation ◽  
Model Design ◽  
Acoustic Performance ◽  
Building Model ◽  
Isolation Index ◽  
New Construction ◽  
And Performance ◽  
Ventilated Facade

RESUMO: A entrada de novos sistemas construtivos no mercado brasileiro tem sido acompanhada de diversos questionamentos sobre o seu desempenho. Entre estes novos sistemas estão as fachadas ventiladas, que surgem com o apelo de um sistema com o potencial de melhorar os aspectos de habitabilidade da edificação. Neste trabalho foi realizado um estudo de desempenho acústico de fachadas ventiladas com porcelanato (FVPo), comparativamente às fachadas de porcelanato aderido (FPoA). Para isto, foi utilizado um projeto de uma edificação habitacional modelo (EHM) para reproduzir as edificações típicas do Plano Piloto de Brasília-DF. Para os cálculos foi utilizado o software Insul e os critérios da norma de desempenho, a NBR 15575 (ABNT, 2013). Para cada critério da norma, os dois sistemas foram comparados e analisados com base nos resultados obtidos na simulação. Os dois sistemas apresentaram o mesmo índice de isolamento sonoro, com um nível mínimo de desempenho. Foi possível verificar a importância da esquadria no isolamento do sistema de fachada, pois ao aumentar a área da esquadria, o índice de isolamento diminui. Este trabalho traz como principal contribuição a avaliação de desempenho acústico para sistemas inovadores no setor brasileiro de edificações. 
 
 ABSTRACT: The insertion of new construction systems in the Brazilian market has been accompanied by many questions about its performance. Among these new systems there is the ventilated façades, which has the potential to improve aspects of building habitability. In this paper, the acoustic performance of a porcelain ventilated façade (FVPo) was compared to a joined porcelain façade (FPoA). A residential building model design (EHM) was used to reproduce the typical buildings of Brasilia-DF. The software Insul and performance standard criteria, in the NBR 15575 (ABNT, 2013), was used to calculate the values. For each criteria of the performance standard, the two systems were compared and analyzed based on the results of the simulation. Both systems presented the same sound insulation index, attending the minimum level of the performance standard. It was possible to verify the importance of the windows in the isolation of the façade system, because when the window frame area increases, the is a decrease of the system isolation index. The main contribution of this paper was the acoustic performance evaluation of innovative systems in the Brazilian building sector.

scholarly journals Lightweight ventilated façade: Acoustic performance in laboratory conditions, analysing the impact of controlled ventilation variations on airborne sound insulation

2020 ◽  
Vol 27 (4) ◽  
pp. 367-379
Author(s):  
Joan Lluis Zamora Mestre ◽  
Andrea Niampira
Keyword(s):  
Sound Insulation ◽  
Air Cavity ◽  
Acoustic Performance ◽  
Controlled Ventilation ◽  
Laboratory Conditions ◽  
Airborne Sound ◽  
Cavity Thickness ◽  
Ventilated Facade ◽  
The Impact ◽  
Real Building

The use of double-sheet enclosures with an intermediate non-ventilated air cavity guarantees a higher airborne sound insulation. The insulation advantages depend on air tightness and the placement of sound absorbing material in the air cavity. The lightweight ventilated façade is a system constructed by the addition of an external light cladding on a heavy single wall to establish an intermediate air cavity. This air cavity can be ventilated under controlled cooling effects, because of Sun’s radiation, and to reduce the risk of dampness caused by rainwater. Owing to this ventilation, acoustic insulation of the lightweight ventilated façade could be less effective. However, some authors indicate that air cavity moderate ventilation does not necessarily lead to a significant reduction in the airborne sound insulation. The authors previously verified this situation in a real building where the existing façade of masonry walls was transformed into a lightweight ventilated façade. The preliminary results indicate the acoustic benefits can be compatible with the hygrothermal benefits derived from controlled ventilation. This article presents the next step, the evaluation of the lightweight ventilated façade acoustic performance under laboratory conditions to revalidate the previous results and refining aspects as the air cavity thickness or the state of openings ventilation. The main results obtained indicate that the airborne sound insulation in laboratory is aligned with the previous results in a real building. Air cavity thickness from 110 to 175 mm and ventilation openings from 0% to 3.84% of the façade area does not lead to a significant reduction in the airborne sound insulation.

scholarly journals The Influence of Insulating Layers on the Acoustic Performance of Lightweight Frame Floors Intended for Use in Residential Buildings

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1217 ◽  
Author(s):  
Łukasz Nowotny ◽  
Jacek Nurzyński
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Basic Structure ◽  
Standard Test ◽  
Test Facility ◽  
Sound Insulation ◽  
Primary Role ◽  
Total Quality ◽  
Transmission Scheme ◽  
Acoustic Performance

The acoustic performance of floors plays a primary role in the total quality rating of a residential building. The sound insulation of lightweight frame floors, which are increasingly being used in housing, depends on a number of factors and technical details. In effect, the sound transmission scheme is distinctly more complicated than in the case of homogeneous massive partitions. The aim of the study was to develop effective insulating layers of lightweight floors intended for use in residential buildings. The floor system should satisfy legal requirements in terms of airborne and impact sound insulation. The research was based on laboratory measurements taken in a standard test facility. Ten different models of wood and metal floors were considered. The acoustic performance of their basic structure was insufficient; however, the application of effective floating floors and suspended ceilings improved it greatly and succeeded in potential meeting requirements and satisfying most inhabitants’ expectations. The results demonstrate how different lightweight floor components influence the acoustic performance of the floor and how the insulating layers cooperate when applied together. The findings will be useful in working on a new floor design and optimizing its structure in terms of acoustics.

scholarly journals Sound-Absorbing Acoustic Concretes: A Review

2021 ◽  
Vol 13 (19) ◽  
pp. 10712 ◽  
Author(s):  
Mugahed Amran ◽  
Roman Fediuk ◽  
Gunasekaran Murali ◽  
Nikolai Vatin ◽  
Amin Al-Fakih
Keyword(s):  
Building Materials ◽  
Measurement Techniques ◽  
Construction Materials ◽  
Residential Building ◽  
Well Being ◽  
Acoustic Properties ◽  
Sound Insulation ◽  
Absorption Properties ◽  
Acoustic Performance ◽  
Cellular Concrete

Noise is continuously treated as an annoyance to humans and indeed commotion contamination shows up within the environment, causing inconvenience. This is likewise interesting to the engineering tactic that inclines to develop this noise proliferation. The basics of the sound-retaining proliferation, sound-absorbing properties, and its variables were rarely considered by previous researchers. Thus, the acoustic performance and sound insulation of constructions have gained significance over the last five decades due to the trend for accommodating inner-city flat and multi-story residential building condominiums. Due to this dilemma, the proliferation of high-driven entertaining schemes has engaged extraordinary demands on building for its acoustic performance. Yet, construction industries worldwide have started to mainly use sound-absorbing concrete to reduce the frequency of sounds in opened-and-closed areas and increase sound insulation. As reported, the concrete acoustic properties generally rely on its density, exhibiting that the lighter ones, such as cellular concrete, will absorb more sound than high-density concretes. However, this paper has an objective to afford a wide-ranging review of sound-absorbing acoustic concretes, including the measurement techniques and insulation characteristics of building materials and the sound absorption properties of construction materials. It is also intended to extensively review to provide insights into the possible use of a typical sound-absorbing acoustic concrete in today’s building industry to enhance housing occupants’ efficiency, comfort, well-being, and safety.

scholarly journals Seismic performance of a high-rise residential building model in Purwokerto, Indonesia

2018 ◽  
Vol 192 ◽  
pp. 02002 ◽  
Author(s):  
Yanuar Haryanto ◽  
Buntara Sthenly Gan ◽  
Nanang Gunawan Wariyatno ◽  
Eva Wahyu Indriyati
Keyword(s):  
Dynamic Response ◽  
Static Analysis ◽  
Pushover Analysis ◽  
Residential Building ◽  
Response Analysis ◽  
Dynamic Response Analysis ◽  
Building Model ◽  
High Rise ◽  
Drift Ratio ◽  
Linear Static Analysis

We evaluated the performance of a high-rise residential building model in Purwokerto, Indonesia due to the seismic load. The evaluation was performed based on seismic loads given in the 2002 and 2012 Indonesian National Standard (SNI) using linear static analysis, dynamic response analysis and pushover analysis. Based on the linear static analysis, the drift ratio decreased by an average of 34.42 and 32.61% for the X and Y directions respectively. Meanwhile, based on the dynamic response analysis, the drift ratio also decreased by an average of 30.74 and 27.33% for the X and Y directions respectively. In addition, the pushover analysis indicates that the performance of this high-rise residential building model is still at Immediate Occupancy (IO) level. The post-earthquake damage state in which the building remains safe to occupy, essentially retaining the pre-earthquake design strength and stiffness of the structure. The risk of life-threatening injury as a result of structural damage is very low. Although some minor structural repairs may be appropriate, these would generally not be required prior to re-occupancy.

scholarly journals BUILDING MODEL DESIGN DEFECTS OBJECT ORIENTED SOFTWARE METHOD

2009 ◽  
Vol 2 (2) ◽  
Author(s):  
М.О. Сидоров ◽  
О.С. Нечай
Keyword(s):  
Object Oriented ◽  
Model Design ◽  
Building Model ◽  
Design Defects

Research on the Insulation Performance of Sound-Isolating and Decoupled Tiles

2013 ◽  
Vol 457-458 ◽  
pp. 703-706 ◽  
Author(s):  
De Jin Qian ◽  
Xue Ren Wang ◽  
Xu Hong Miao
Keyword(s):  
Large Scale ◽  
Acoustic Radiation ◽  
Single Point ◽  
Mechanical Vibration ◽  
Sound Insulation ◽  
Acoustic Performance ◽  
Operating Modes ◽  
Insulation Effect ◽  
Vibration And Sound Radiation ◽  
Insulation Performance

The acoustic performance of sound-isolating and decoupled tiles is studied from macroscopic and microscopic. First, the sound absorption and reverse sound insulation performance of sound-isolating and decoupled tiles is studied based on laminated media; then the acoustic decoupling materials influence on acoustic radiation of double cylindrical shell underwater is studied, using a double-layer cylindrical structure of large-scale as experimental model .There are large amount of operating modes designed in this experiment, such as all laying, partial laying, laying and so on. The results show that sound-isolating and decoupled tiles not only have the effect of weakening the absorption of reflections, but also have reverse sound insulation effect, which increases as frequency increases; for single point mechanical vibration, the tiles can effectively inhibit vibration and sound radiation of high frequency in the double shell.

Sound insulation performance of pyramidal truss core sandwich structure with frame

2021 ◽  
pp. 109963622110288
Author(s):  
Yu-Zhou Wang ◽  
Li Ma
Keyword(s):  
Mechanical Properties ◽  
Sandwich Structure ◽  
Transmission Loss ◽  
Low Frequency ◽  
Sound Insulation ◽  
Geometrical Parameters ◽  
Acoustic Performance ◽  
Truss Core ◽  
Pyramidal Truss ◽  
Wave Angle

Recently, sandwich structures have been widely used in different fields because of their good mechanical properties, but these structures are weak in acoustic performance. In this paper, by combining pyramidal truss core sandwich structure with frame, a new structure is proposed with both good mechanical properties and excellent acoustic performance at low frequency. An analytical model of the pyramidal truss core sandwich structure with frame is developed to investigate the sound transmission loss (STL) performance. Finite element method (FEM) is also used to investigate the STL performance at low frequency. The effects of the incident wave angle and the geometrical parameters on the STL of the structure are discussed.

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