Abstract In this thesis, the effect of the orientation of trussed honeycomb core design on the stiffness of a composite honeycomb plate is presented. A commercial finite element (FEM) package ¡¥MSC-MARC¡¦ is employed in the stiffness simulation. To illustrate the feasibility and accuracy of the proposed FEM model, the measured and calculated data for two different sizes regular honeycomb plates (with regular hexagonal cell) are compared. Results show that a good agreement between the simulated and the measured static deflections and dynamic characteristics is found. Numerical results indicate that different orientations of trussed honeycomb core design may improve the stiffness/density ratio of a composite honeycomb plate significantly. The effects of other design parameters of composite honeycomb plate, e.g. width and height of plate, thickness of truss, cell wall and faces, and material of truss, on the stiffness/density ratio have also been investigated in this study.

Made available in DSpace on 2014-06-11T19:25:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-04-11Bitstream added on 2014-06-13T18:53:17Z : No. of bitstreams: 1 moraes_vm_me_ilha_prot.pdf: 4456756 bytes, checksum: 70a028ea28db2cfaed1abecec234c525 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / As pontes mistas com vigas de madeira e tabuleiro de concreto, que constituem uma técnica já bastante estudada pelo meio acadêmico brasileiro, vêm ganhando cada vez mais espaço entre os projetistas e construtores de pontes em estradas vicinais do interior do Brasil. Entretanto, o vão dessas pontes é limitado pelo comprimento das peças de madeira, cujos valores máximos, em geral, ficam em torno de 6 metros para vigas serradas e 12 metros para vigas roliças. Neste contexto, a presente pesquisa propõe um novo sistema estrutural de pontes mistas para vencer vãos da ordem de 15 a 20 metros, constituído por vigas treliçadas de madeira que suportam a laje de concreto armado. O tabuleiro do sistema proposto pode ser executado utilizando, como pré-laje, painéis treliçados pré-moldados auto-portantes, evitando-se escoramentos e, conseqüentemente, reduzindo o tempo e os custos de construção. A laje final é solidarizada às treliças de madeira por intermédio de pinos metálicos de cisalhamento, que fazem com que ambos os materiais trabalhem solidariamente na resistência aos esforços solicitantes, buscando, portanto, a otimização do uso estrutural desses materiais. A principal abordagem desta pesquisa é experimental, com a construção e análise de um modelo físico reduzido na escala 1:4... / Timber-concrete composite structures - TCCS - constitute a technique well studied by the Brazilian academy and have been each time more present among the designers and constructors of bridges in secondary roads in the interior of Brazil. However, the span of these bridges is limited by the length of the timber beams, whose maximum values, in general, are around 6 meters for sawed beams and 12 meters for round beams. In this context, the present research suggests a new structural system of composite bridges, to overcome spans from 15 to 20 meters, built by trussed timber beams that support a reinforced concrete deck. The deck of the system can be executed using precast self-supported trussed panels, preventing props and, consequently, reducing time and costs of construction. The final slab is connected to the trussed beams by metallic shear bolts, which make that both the materials (timber and concrete) work together in the resistance to the requesting efforts, aiming the optimization of the structural use of these materials. This research was based on an experimental approach, with the construction and analysis of a reduced physical model in the scale 1:4, based on a bridge design classified as 30t with a free span of 16 meters. The model was instrumented with strain gauges and... (Complete abstract click electronic access below)

Orientador: José Antônio Matthiesen / Banca: José Luiz Pinheiro Melges / Banca: Antonio Alves Dias / Resumo: As pontes mistas com vigas de madeira e tabuleiro de concreto, que constituem uma técnica já bastante estudada pelo meio acadêmico brasileiro, vêm ganhando cada vez mais espaço entre os projetistas e construtores de pontes em estradas vicinais do interior do Brasil. Entretanto, o vão dessas pontes é limitado pelo comprimento das peças de madeira, cujos valores máximos, em geral, ficam em torno de 6 metros para vigas serradas e 12 metros para vigas roliças. Neste contexto, a presente pesquisa propõe um novo sistema estrutural de pontes mistas para vencer vãos da ordem de 15 a 20 metros, constituído por vigas treliçadas de madeira que suportam a laje de concreto armado. O tabuleiro do sistema proposto pode ser executado utilizando, como pré-laje, painéis treliçados pré-moldados auto-portantes, evitando-se escoramentos e, conseqüentemente, reduzindo o tempo e os custos de construção. A laje final é solidarizada às treliças de madeira por intermédio de pinos metálicos de cisalhamento, que fazem com que ambos os materiais trabalhem solidariamente na resistência aos esforços solicitantes, buscando, portanto, a otimização do uso estrutural desses materiais. A principal abordagem desta pesquisa é experimental, com a construção e análise de um modelo físico reduzido na escala 1:4... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Timber-concrete composite structures - TCCS - constitute a technique well studied by the Brazilian academy and have been each time more present among the designers and constructors of bridges in secondary roads in the interior of Brazil. However, the span of these bridges is limited by the length of the timber beams, whose maximum values, in general, are around 6 meters for sawed beams and 12 meters for round beams. In this context, the present research suggests a new structural system of composite bridges, to overcome spans from 15 to 20 meters, built by trussed timber beams that support a reinforced concrete deck. The deck of the system can be executed using precast self-supported trussed panels, preventing props and, consequently, reducing time and costs of construction. The final slab is connected to the trussed beams by metallic shear bolts, which make that both the materials (timber and concrete) work together in the resistance to the requesting efforts, aiming the optimization of the structural use of these materials. This research was based on an experimental approach, with the construction and analysis of a reduced physical model in the scale 1:4, based on a bridge design classified as 30t with a free span of 16 meters. The model was instrumented with strain gauges and... (Complete abstract click electronic access below) / Mestre

The subject of this thesis is the design and assessment of steel sports hall in the town of Krnov. The main structural material is steel S355JR. The ground plan dimensions of the object is 48,0 metres to 36,0 metres, the height of the object is 16,78 metres. There is a sport facilities unit adjusted to the construction . The dimension of such an object is 30,0 metres to 8,0 metres. The support system consists of columns and an arched trussed rafter. The axial distance of cross-links is 8,0 m. The spatial rigidity is ensured by the transverse and longitudinal bracings. The hall is founded on reinforced concrete strip footings. The perimeter and roof cladding consists of sandwich panels. In this work is processed a static calculation of structural elements including connections and drawing documentation.

The subject of the diploma thesis is design and structural analysis of the sports hall. The building is located in Pardubice city. The dimensions of a floor plan are 45,5 m x 30,0 m, the height is 13,0 m. There is a sport facilities unit adjusted to the construction. The dimension of such an object is 39,0 m x 10,0 m. The load-bearing structure consists of truss girders, which are pin-supported by fixed columns. The distance between main trusses is 6,5 m. The supporting part of the roof deck consists of solid-purlins. Space stability is ensured by cross bracing and longitudinal bracing. All bars are rolled steel profiles and are designed according to current ČSN EN standards. Steel S355 is used as the construction material. In this work is processed a structural design report of main elements including connections and drawing documentation.

The content of the diploma thesis is design and assessment of railway station steel structure. It is a two-nave building with a length of 198m. The bigger nave span is 40m and it is 14m high. The smaller nave is 11m high and its span is 25m. The total width of the structure is 65 meters. The main construction material is S355JR steel. The supporting structure of the hall is formed by a curved planar trusses with axial distance of 6 meters. The transverse direction also consists of column that bears two main trusses. The static analysis of the main bearing parts of the structure, including joints and details is processed. The calculation were made in accordance with the Czech technical norms CSN EN.

The subject of the diploma thesis is the design and structural analysis of an exhibition hall. The building is located in Brno city. The dimensions of a floor plan are 121,8 m x 66,5 m, the height is 17,75 m. The load-bearing structure consists of arched truss girders, which are pin-supported by fixed columns. The distance between main trusses is 8,7 m. The supporting part of the roof deck consists of solid-purlins. Spatial rigidity of the structure is ensured by cross bracing and longitudinal bracing. All structural members are made of rolled steel profiles and are designed according to current ČSN EN standards. Steel S355 is used as the construction material. This thesis consists of structural design report of main load bearing elements including connections design and drawings.

The aim of this diploma thesis is to design a mountain hotel in the village Rokytnice nad Jizernou. The object is placed on a sloping plot located in an attractive touristic and skiing area of mountain range Krkonoše. The mountain hotel has 4 floors and a basement. In the First floor there is a restaurant with a terrace, kitchen and administrative facilities of hotel. In the second and third floor we can find guest rooms and room for the hotel staff. In the basement there is wellness, technical facilities and garage compound. Construction of building is made of the reinforced concrete monolithic transverse frames with beam filling of ceramic block.

The goal of the project is behaviour and dimensioning of selected monolithic concrete structure elements. Design and assessment of the building foundation was made. Slabs of the floors are dimensioned in detail. All computations are made in accordance with Eurocode 2. Drawing documentation is part of this project.