scholarly journals RATIONAL CHOICE OF CONSTRUCTION AND TECHNOLOGICAL SCHEMEOF SOUND INSULATION OF THE FLOOR IN A MONOLITHIC REINFORCED CONCRETE MULTI-STOREY RESIDENTIAL BUILDING

2021 ◽  
pp. 3-11
Author(s):  
I.N. Babii ◽  
Ye.Yu. Kalchenia
Keyword(s):  
Reinforced Concrete ◽  
Rational Choice ◽  
Residential Building ◽  
Sound Insulation

Using different waste as resilient layers for impact sound insulation improvement: New alternative to commercial layers?

2021 ◽  
pp. 014362442110537
Author(s):  
Francisco José García-Cobos ◽  
Rubén Maderuelo-Sanz
Keyword(s):  
Residential Building ◽  
Acoustic Properties ◽  
Sustainable Construction ◽  
Sound Insulation ◽  
Building Sector ◽  
Impact Noise ◽  
Cigarette Butts ◽  
Industrial Materials ◽  
Recycled Waste

In the residential building sector, the use of floating floors is a common practice which increasingly used to reduce vibrations and impact noise. These are usually made from industrial materials, although the emerging concern for sustainable construction is leading to the use of other materials from recycled waste. This article studies the performance of rubber, cork, and cigarette butts as a floating floor. For this purpose, their acoustic properties (ISO 9052-1 and 12,354-2 standards) are analyzed and compared with those of some commercial materials. The results obtained indicated that the performance of these eco-materials is equal or superior to that of commercially available materials.

scholarly journals Research on the Efficiency of Composite Beam Application in Multi-Storey Buildings

2020 ◽  
Vol 12 (20) ◽  
pp. 8328 ◽  
Author(s):  
Tomas Kinderis ◽  
Mindaugas Daukšys ◽  
Jūratė Mockienė
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Composite Beam ◽  
Concrete Beams ◽  
Residential Building ◽  
Reinforced Concrete Beam ◽  
Composite Beams ◽  
Reinforced Concrete Beams ◽  
Assessment Criteria ◽  
Floor Structure

Over the past decade, several types of composite slim floor constructions have been used in multi-storey buildings in Lithuania. In order to study the efficiency of composite beam application in steel-framed multi-storey buildings, Thorbeam (A1), Deltabeam (A2), slim floor beam (A3) and asymmetric slim floor beam (A4) were chosen and evaluated according to nine assessment criteria (beam cost (K1), initial preparation on site (K2), installation time (K3), complexity of installation technology (K4), labour costs (K5), fire resistance (K6), load bearing capacity (K7), beam versatility (K8), and availability of beams (K9)). First, the significance of the rating criteria was selected and the order of the ranking criteria was obtained (K1˃K7˃K3˃K6˃K4˃K5˃K2˃K8˃K9) by means of a survey questionnaire. Second, the beams were ranked according to the points given by the questionnaire respondents as follows: 160 points were given to A2, 144 points to A1, 129 points to A4, and 111 points to A3. Deltabeam is considered to be the most rational alternative of the four beams compared. Calculations done using the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) analysis method revealed that composite beam A2 was the best slim floor structure alternative for an eight-storey high-rise commercial residential building frame, A1 ranked second, A4 ranked third, and A3 ranked fourth. In addition, the four composite beams were compared to a reinforced concrete beam (A5) according to three assessment criteria (beam cost including installation (C1), beam self-weight (C2) and fire resistance (C3)). Deltabeam was found to be efficient for use as a slim floor structure in a multi-story building due to having the lowest cost, including installation, and self-weight, and the highest fire resistance compared to other composite beams studied. Although Deltabeams are 1.4 times more expensive than reinforced concrete beams, including installation costs, they save about 2.5% of the building’s height compared to reinforced concrete beams.

scholarly journals Key Mechanisms of the Seismic Behaviour of External RC Wide Beam–column Joints

2019 ◽  
Vol 13 (1) ◽  
pp. 36-51 ◽  
Author(s):  
Giuseppe Santarsiero ◽  
Angelo Masi
Keyword(s):  
Reinforced Concrete ◽  
Numerical Simulations ◽  
Peak Load ◽  
Residential Building ◽  
Experimental Tests ◽  
Experimental Results ◽  
Seismic Behaviour ◽  
Building Stock ◽  
Wide Beam ◽  
First Case

Background: Reinforced concrete beam-column connections provided with wide beams are widely used in the European residential building stock. Several seismic codes indicate some limitation to be applied to this kind of reinforced concrete buildings due to their reduced performances with respect to those provided with conventional beams. Objective: The paper is focused on improving the knowledge of wide beam-column joints, highlighting the key degradation mechanisms affecting them, mainly related to slip phenomena of beam rebars, especially the rebars placed outside the column width. Methods: The behavior of wide beam-column joints has been evaluated by means of both experimental tests under cyclic loading and accurate nonlinear finite element analyses. The FE models predicted satisfactorily experimental results, thus enabling to carry out additional numerical analyses aimed at checking the effect of the longitudinal reinforcement amount in the beam member. Results: Experimental results show that wide beam-column joints conforming to the Italian seismic code do not exhibit a sufficiently ductile behavior due to damage in the non-confined concrete region, where beam rebars external to the joint core are anchored. Numerical simulations allowed to monitor bond slip of beam rebars as a function of the applied global displacement, showing differences between bars placed inside and outside the column width. Conclusion: Numerical simulations showed that different behavior is expected in case additional beam rebars are placed either inside or outside column width. In the first case, higher peak load and ductility values can be achieved, provided that the amount of beam reinforcement is not high enough to shift damage towards the column or cause high shear stress to the joint core and its consequent fragile failure.

scholarly journals A Software Model for Parameters Affecting the Dimensions of Reinforced Concrete Prefabricated Facade Elements

2021 ◽  
Vol 8 (3) ◽  
pp. 259-282
Author(s):  
Mustafa Tosun ◽  
Enes Yasa
Keyword(s):  
Reinforced Concrete ◽  
Computer Program ◽  
Sound Insulation ◽  
Model Program ◽  
Static Behavior ◽  
Software Model ◽  
Building Facade ◽  
Industrial Buildings ◽  
Abstract Condition ◽  
And Behavior

In this study, a model software of a computer program related to determining dimensional behavior, which will contribute to the multi-layered units used on the facade of industrial buildings to be standardized, has been prepared. By means of this model software, the factors determining the width (A), the height (h) and the section (d) of the units of a building facade, could be evaluated. These factors, at the same time, from the dimensions of building facade units providing “thermal insulation, sound insulation statically behavior and coordination dimension of facade unit.” In the program (named as MT2 Prefabrike), these four factors could be evaluated by providing the optimization in sequence and within themselves. Thus, by developing a new method of approach in the standardizing of facade units, apart from the visible characteristics of the units, the idea of standardizing the performance and behavior expected from the units, are put forward. In the model program formed with this idea, before producing of the facade units, the optimization is to be provided by analyzing the factors which are effective in giving dimension to the units, in abstract condition (computerized). Keywords: a model software, building facade unit, prefabrication, thermal and sound ınsulation, static behavior analysis, the facades of ındustrial buildings

Analysis of Sound Insulation Performance of Reinforce Concrete Walls between Households According to Wall Thickness Criteria in Apartments

2017 ◽  
Vol 873 ◽  
pp. 237-242
Author(s):  
Hye Kyung Shin ◽  
Kyoung Woo Kim ◽  
A Yeong Jeong ◽  
Kwan Seop Yang
Keyword(s):  
Reinforced Concrete ◽  
Wall Thickness ◽  
Field Measurements ◽  
Reinforce Concrete ◽  
Sound Insulation ◽  
Concrete Wall ◽  
Minimum Thickness ◽  
Concrete Walls ◽  
Reinforced Concrete Wall ◽  
Insulation Performance

Sound insulation between households is properly ensured to provide a quiet residential environment in apartments. The legal requirements for sound insulation in apartments in Korea are set to meet the wall’s minimum thickness or sound insulation performance. When construction companies choose the walls that satisfy thethickness in the standards of boundary walls between households, it is difficult to know the sound insulation performance. In this study, the sound insulation performance of reinforced concrete walls is predicted according to the wall thickness criteria and analyzed through field measurements. In newly built apartments, the reinforced concrete wall’s sound insulation performance(R'w) is 56 – 66 dB, which is a similar level of the international criterion. And the sound insulation performance of the reinforced concrete wall according to thickness standards is similar to sound insulation performance standardsof Korea.

scholarly journals Sound insulation of wooden floors

2018 ◽  
Vol 49 ◽  
pp. 00077
Author(s):  
Artur Nowoświat ◽  
Rafał Żuchowski ◽  
Michał Marchacz ◽  
Leszek Dulak
Keyword(s):  
Residential Building ◽  
Mineral Wool ◽  
Sound Insulation ◽  
Insulation System ◽  
Wooden Floor ◽  
Acoustic Insulation ◽  
Floor Structure ◽  
Single Number

The objective of the article is to assess acoustic insulation of a wooden floor structure between stories in a pre-war residential building. The measurements involved acoustic insulation against impact sounds and airborne sounds. The article presents the results of acoustic tests for noninsulated floors and then for floors insulated with mineral wool. First, the results of the research were analyzed in terms of single-number acoustic insulation rates. These results were compared to the standards and findings described by other researchers. Then, an analysis was carried out for the processes as a function of frequency. The conclusions described in this article allow us to assess the applied acoustic insulation system.

scholarly journals The collapse of Real Class building

2018 ◽  
Vol 11 (2) ◽  
pp. 357-388
Author(s):  
R. J. C. RIBEIRO ◽  
D. R. C. OLIVEIRA
Keyword(s):  
Reinforced Concrete ◽  
Residential Building ◽  
Linear Analysis ◽  
Reinforced Concrete Structures ◽  
Large Displacements ◽  
Structural System ◽  
Building Collapse ◽  
Wind Actions ◽  
Using Data ◽  
The City

Abstract This paper describes the scene of the Real Class building collapse, a residential building with reinforced concrete structural system and located in the urban area of the city of Belem / PA, occurred in 2011. The unconformities found in the building are displayed using data extracted from reports and verification of structural and architectural designs. The data was compared with the Brazilian code for reinforced concrete structures, NBR 6118 (2007), valid at the time of the accident. The security of the building was evaluated through a computer model with linear analysis with the software used by the designer. The conditions of the structural system designed and as built was evaluated with parameters of global stability and load capacities of columns and foundations. The results showed that the structure of the building was subject to large displacements and the sections of columns were unable to resist the stresses produced by regional wind actions.

Countermeasures against floor impact sound by heavy impact source of a box floor structure in a reinforced concrete wall construction testing device

2021 ◽  
Vol 263 (5) ◽  
pp. 1396-1404
Author(s):  
Ryuta Tomita ◽  
Kyoko Abe
Keyword(s):  
Reinforced Concrete ◽  
Sound Level ◽  
Sound Insulation ◽  
Testing Device ◽  
Concrete Wall ◽  
Heavy Weight ◽  
Floor Structure ◽  
Reinforced Concrete Wall ◽  
Wall Construction ◽  
Bare Surface

We have performed experimental examinations for the purpose of proposing a floor finishing structure with superior effects in terms of combating heavy-weight floor impact sound. We have developed a box floor with ease of construction and excellent heavy-weight floor impact sound insulation performance and examined its effect with a 1200 × 1200 mm test piece connected to inter-noise 2020. The box floor has a floor finishing structure with anti-vibration and sound insulation measures aimed at improving measures against heavy-weight floor impact sound. We herein report the results of a basic examination on the reduction of the transmitted heavy-weight floor impact sound of a box floor structure in a reinforced concrete wall construction testing device when the area is further expanded to about 10 . As a result, with the air layer under the box floor open, the floor impact sound level was reduced by 9 dB in the 63-Hz band compared to the bare surface. In addition, with the air layer at the bottom of the BOX floor sealed, the floor impact sound level was reduced by 5 dB in the 63-Hz band compared to the bare surface.

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