The sound insulation demands for dwellings and public building has increased over the years as the number of sound sources has grown. From the outside our homes are exposed to noise from cars, trains, airplanes, etc. Noise intrudes from our neighbours and their television and stereo equipments. Also noise from spaces for mechanical services systems tends to become more important due to increasing energy saving demands. This thesis presents new analytical models for predicting the sound reduction index of single or double plate systems. In the single plate case, a theoretical and experimental analysis of the air-borne sound transmission through a single plate is presented. The plate is assumed to be excited by a diffuse sound field and the velocity distribution of the plate is derived from the Kirchoff plate equation in the frequency domain. The resulting Fourier transform is evaluated using residue calculus and the solution is verified numerically. The analytical model is valid for a wide frequency range, both below, above and at the critical frequency. Special interest is paid to the area dependency of the sound reduction index. This technique is further expanded for the double plate case by adding another plate and an intermediate layer which is modelled as a locally reacting spring. The model is valid and continuous through both the mass-spring-mass resonance and the coincidence region. The results from the analytical models show good agreement with measured results in both the single and double plate case. A simplified model is also presented for the sound reduction index of finite size floating floors. The model is valid for two elastic plates with a resilient layer in between where the bottom plate, the load-bearing slab, is assumed to be excited with a diffuse airborne sound field. The top plate and the resilient layer compose the floating floor. The problem is solved for frequencies below, between and above the critical frequencies of the plates. Above the critical frequency of the load-bearing plate, but below that of the floating slab, the main coupling between the plates will occur at the coincidence angle of the load-bearing plate. Above the critical frequency of both plates, the main transmission will occur at the angle of coincidence of each plate. As the plates will interact, the sound insulation improvement will to some extent depend on the properties of the load-bearing slab. It is shown how the sound reduction index depends on the physical parameters and the geometry of the plates. / QC 20101101

Made available in DSpace on 2015-04-01T11:58:39Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 3583715 bytes, checksum: 18e9b18d6b0151c38251cd2a26b3f40a (MD5) Previous issue date: 2013-11-22 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The final destination for waste polymers EVA (Ethylene Vinyl Acetate) discarded by footwear industries has been recognized as a increasing problem of impact on the environment. However, studies have show that these residues have characteristics suitable for recycling purposes transforming them into lightweight aggregates, which may provide benefits to the environment for example, their use to attenuate effects of noise impacts problems on the floors, which are very common in multi floor buildings. This research aims to evaluate the acoustic performance of cement boards, consisting of waste aggregates EVA (EVA boards), applied as a resilient material in the composition of floating floor. In this study three types of EVA boards were developed with different thickness and geometries, one of which has whole flat surface (EVA_ar0) and the other with a low relief surfaces (EVA_ar1 and EVA_ar2,5), to yield a layer of air between these boards and the slab. The plates were evaluated for the ability to soundproofing, following the guidelines of ISO 140-7:1998 and ISO 717-2:2013, seeking to compare their performance with some materials available for use in floating floors, for example, polyethylene acoustic blanket and rock wool. The assessment of the level of sound insulation to mitigate the noise impact was performed in a Testing Laboratory of Materials and Structures, Federal University of Paraiba, simulating a situation between two adjacent floors. Based on the results it can be stated that the boards EVA, according to their performance achieved, has the potential to rank as an alternative material used for mitigation of impact noise between floors of multi floor buildings. The floating floor system composed with the board EVA_ar2 , 5 (with air 2.5 cm layer ) had global number (L'nT,w) equal to 64 dB, framed with better intermediate level of performance (I) the that the performance of other systems with boards EVA_ar0 (without air layer) and EVA_ar1 (with air 1 cm layer) obtained global number 67 and 66 dB respectively classifying performance with minimal (M), according to NBR 15.575-3:2013. / A destinação final para os resíduos de polímeros de EVA (Etileno Acetato de Vinila) descartados pelas indústrias calçadistas tem sido reconhecida como um problema crescente de impacto no meio ambiente. Contudo, estudos têm comprovado que esses resíduos possuem características adequadas para propósitos de reciclagem transformando-os em agregados leves, que podem trazer benefícios ao ambiente construído, como por exemplo, o seu aproveitamento visando atenuação de problemas de ruídos de impactos nos pisos, que são muito comuns nas edificações multipavimentos. Portanto, essa pesquisa tem como objetivo avaliar o desempenho acústico de placas cimentícias, executadas com agregados de resíduos de EVA (placas de EVA), aplicadas como material resiliente na composição de sistemas de piso flutuante. Nesse estudo foram desenvolvidas três placas de EVA com espessura e geometrias diferentes, sendo uma delas com todas as superfícies planas (EVA_ar0) e outras duas com uma das superfícies com baixo relevo (EVA_ar1 e EVA_ar2,5), de modo a resultar uma camada de ar entre tais placas e a laje. As placas foram avaliadas quanto a capacidade de isolamento acústico, seguindo as diretrizes das normas ISO 140-7:1998 e ISO 717-2:2013, procurando comparar seu desempenho com alguns materiais disponíveis no mercado para uso em pisos flutuantes, como por exemplo, manta acústica de polietileno e lã de rocha. A avaliação do nível de isolamento acústico para atenuar os ruídos de impacto foi realizada em protótipo no Laboratório de Ensaio de Materiais e Estruturas da Universidade Federal da Paraíba, simulando uma situação entre dois pavimentos sobrepostos. Com base nos resultados pode-se afirmar que as placas de EVA, de acordo com seu desempenho alcançado, tem potencial para se classificar como um material alternativo utilizado para atenuação de ruído de impacto entre os pisos de edificações multi pavimento. O sistema de piso flutuante composto com a placa de EVA_ar2,5 (com camada de ar de 2,5 cm) obteve número global (L´nT,w) igual a 64 dB, enquadrado com nível de desempenho intermediário (I) melhor do que os desempenhos dos outros sistemas com as placas do EVA_ar0 (sem camada de ar) e EVA_ar1 (com camada de ar de 1 cm) obtiveram número globais 67 e 66 dB respectivamente se classificando com desempenho mínimo (M), segundo a NBR 15.575-3:2013.

The subject of diploma thesis is the elaboration of project documentation of an office building in the northern part of the city of Brno-Medlánky. The office building is designed as a four-storey, without basement. The roofs are flat, and the facade is designed as a glazed curtain wall. The operation of the office building is divided into an administrative part, a commercial part and a cafe. The individual operations do not intersect. Next to the building is a parking lot for customers and employees. The structural system of the building is RC frame with reinforced concrete walls. The internal walls are made of aerated concrete and acoustic lime-sand blocks. The partitions are precast plasterboard. The ceilings are cast-in-place reinforced concrete slabs. The floors are heavy floating with hot water underfloor heating. Most of the flat roofs are green. The drawing part was processed in Revit and AutoCAD.

Master’s thesis theme is mountain hotel project. The hotel has one lower basement and four aboveground floor. It has trditional look and the roof is double-pitched. Floor projection looks like letter "L". Main part has measurements 25,3 x 14,1 m and it has four floor. Extension is on northwest side of main part. It has measuremnts 11,85 x 9,5 m and three floor. Facede of basement and first floor is from stone facing mansory. Facade od second floor of main patr of buildings id timbered looks like curb. Third and fourth floor are attic, gable is vertical timbered. Facade of second floor of extension is plaster on ETICS. The gable od extension is vertical timbered. Roof covering is alpen shingle from larch wood. Foundations of house are shallow. The construction system is walled. The lower basement is built from masonry BS Klatovy BD30 and other wall are from masonry Porotherm . Floor structures are from monolithic reinforced concrete, thickness 220 mm. House stairs are prefabricated double-flight. Partition wall are mostly built from mansory Porotherm 11,5 P+D. Lintols above windows and doors in facadeare made by reverse of floor slab and inside of disposition are made by ceramics lintols Porotherm. Floor structures are floating with impact insulation in whole house. In living rooms wear layers are from oak parquet block and in common rooms, toilets, bathrooms and technical rooms is ceramics paving. Wall’s surfaces are made from patent plaster and in lower basement are made from two-coat work with white coat. Toilets and bathrooms are tilled with ceramic tiles. All distributions of building equipment are covered with gypsum plasterboard ceiling. All windows and doors in facade are made by wooden profile Solid comfort SC78 and glazed by triple glazing unit (Uw,max=0,9 W/m2.K), exception is main entrance door, It is made by aluminum profile and it is automatically opened.

Master’s thesis deals with complete project documentation of newly built object of library and mediatheque located on the site in České Budějovice. It is a three-storey building divided into three parts, one-storey, two-storey and three-storey. It is partly basement. The underground part is devoted to main storage spaces of library services, management offices and social facilities for staff (toilets, changing rooms, washrooms). This part of the building has own entrance for employees. In the 1st floor is located the main library area along with exhibition spaces and the main entrance for visitors with self service cloakroom. In the 2nd floor are designed library spaces for visually impaired persons with fund of audio books, CDs and DVDs, a lecture hall with a projector and own kitchen and space for reading magazines and periodicals. From this floor is possible access to the outdoor terrace, which has own terrace furniture store nearby. In the 3rd floor is located a literary café with its own facilities. In each floor are also designed sanitary facilities for use by persons with limited ability of movement and orientation. All floors are connected by stairs and passenger lifts. In terms of construction, the building is designed as a frame, in the underground parts made of reinforced concrete, the overhead of glued laminated timber elements. The ceiling structure designed over the underground floor is monolithic reinforced concrete slab. The ceilings in the upper part are designed as a wooden beamed made of the glued laminated timber elements. The building has a pent roof created by wooden trusses assembled with punched metal plate fasteners. The foundations are designed as belts and footings. The study, detailed documentation, thermal-technical evaluation of selected structures and fire safety of the building are processed. For processing of the thesis were used software AutoCAD 2010, Teplo 2011, Area 2011, Ztráty 2011 and Fire NX 802 PRO.