Universidade Federal de Uberlândia / Este trabalho é relativo a uma investigação experimental sobre reforço à flexão de vigas de concreto armado e a influência de um tipo de conector. O programa experimental foi constituído de 8 conjuntos de blocos de concreto e de 15 vigas. Os blocos para ensaios de cisalhamento direto com seção transversal de 15 cm x 15 cm, sendo 4 conjuntos sem conectores e 4 com conectores. As vigas para ensaio à flexão possuíam seções transversais de 12 cm x 22 cm e comprimento de 200 cm, distribuídas em três séries de ensaio, cada uma envolvendo cinco vigas: 5 vigas utilizadas para referência, ou seja, sem reforço, 10 vigas reforçadas com superfície do substrato de textura escovada, sendo 5 delas com conectores metálicos colados no substrato. Para a confecção das vigas foi utilizado concreto usinado auto adensável de 20 MPa, 2ø12,5 mm na armadura longitudinal inferior e 2ø5 mm na armadura longitudinal superior. Os estribos foram de ø5 mm, espaçados a cada 10 cm. As vigas foram submetidas à aplicação de uma força aplicada em dois pontos, distantes de 60 cm dos apoios. Previamente a ruptura e ao serviço de reforço, todas as vigas foram submetidas à carga de projeto até a estabilização de flecha, posteriormente, a carga foi reduzida para 80 % sendo executado o reforço e finalmente ensaiadas até a ruptura. O reforço foi composto do acréscimo de 5 cm de graute nas laterais e fundo da viga em uma extensão de 140 cm, simetricamente ao centro do vão. As armaduras acrescentadas foram similares a existente na viga. A força aplicada, os deslocamentos, as deformações no aço e no concreto foram medidas. Nos ensaios de cisalhamento direto em blocos, os conectores contribuíram para o aumento da tensão média de ruptura em 70,8%. As vigas de referência romperam por flexão com cargas próximas às calculadas. Pelos resultados, o reforço à flexão foi eficiente, elevando a capacidade portante em 44 % e mudou o mecanismo de ruptura para cisalhamento no trecho sem reforço. Nas vigas com conectores o aumento foi de 47%, somente um pouco superior, pois eles não foram totalmente solicitados. / This work is based on an experimental investigation of reinforced concrete beams strengthened to flexure and the influence of a type of connector. The experimental program consisted of 8 sets of concrete blocks and 15 beams. The blocks used in shear tests with cross section of 15 cm x 15 cm, 4 sets without connectors and 4 with connectors. The beams for flexure testing had cross sections of 12 cm x 22 cm and length of 200 cm, divided in three series of the tests, each involving five beams: 5 beams was used for reference, that is, without reinforcement. 10 beams reinforced with surface brushed texture substrate, 5 of them with metal connectors bonded to the substrate. Beams were made with self-compacting concrete of 20 MPa, 2ø12,5 mm to longitudinal bottom reinforcement and 2ø5 mm at longitudinal top. The stirrups were ø5 mm and 10 cm long run. The beams were submitted to four-point load bending test. Previously to the rupture and reinforcement, all the beams were submitted to the project load up to its deflection's stabilization, later, the load was reduced to 80% and executed the reinforcement and finally tested to rupture. The reinforcement was composed of 5 cm grouting increase on the sides and bottom of the beam in a length of 140 cm, symmetrically of the center. The additional reinforcement was similar to the used in the beam. The applied force, the displacement, deformations in steel and in concrete were measured. In direct shear tests in blocks, the connectors contributed to increase in the rupture average stress in 70.8%. The reference beams broken by flexure with loads next to those calculated. The results, the flexure reinforcement was efficient, increasing the load capacity by 44% and changed the rupture mechanism to shear at the unreinforced section. At the beams with connectors the increase was of 47%, a little superior because they had not only been total requested. / Dissertação (Mestrado)

The theme of the diploma´s thesis is a new building of a multipurpose cultural centre in Veselí nad Moravou, district Hodonín. Structural system consists of a monolithic reinforced concrete construction and a sand-lime masonry. Roof is designed as a flat roof and a flat vegetation roof. The vertical communication space is solved by reinforced concrete staircases and elevator. The building is located near the elementary art school.

[pt] Trata-se de proposta ensaística de releitura das obras de quatro arquitetos modernos brasileiros - Lucio Costa, Affonso Eduardo Reidy, Oscar Niemeyer e Paulo Mendes da Rocha - sob o ponto de vista da tecnologia da construção. A investigação parte diretamente da experiência das obras e busca apontar algumas das soluções que tornaram possível a realização de uma engenhosa produção, não obstante a dificuldade de conciliação da teoria do projeto arquitetônico moderno internacional e a prática da construção no Brasil. / [en] This essay proposes a rereading of the works of four modern Brazilian architects - Lucio Costa, Affonso Eduardo Reidy, Oscar Niemeyer, and Paulo Mendes da Rocha - from a technical perspective. The study is based directly on the experience of these works and seeks to identify some of the solutions that have made possible the achievement of an ingenious production, despite the difficult task of conciliating the theory of international modern architectural project with Brazilian building construction technology.

The subject of the diploma thesis is to elaborate a selected part of the construction technology project for an apartment building in the Campus residential complex II, situated in Brno – Bohunice. Specifically, an apartment building (object F, designated SO 204) was selected, on which monolithic structures of the substructure will be solved. The content of the work is a technical report to the construction technology project, evaluation of transport routes, elaboration of technological regulations for selected technological stages, time schedule for the selected stage and partial detailed section of a typical floor. Furthermore, the construction site equipment with drawing and text part, control and test plan, itemized budget with bill of quantities, design of machine assemblies and work safety solutions are elaborated.

Subject of this master thesis is the structural and technological support for the construction of nursery school in Brno Ivanovice. The aim of master thesis is to design time, financial and material resources. The thesis contains technical report, time schedule, building-site, technological standard, control and quality inspection plan and study of realization of the main stages. Part of the thesis is trade’s specialization.

The master´s thesis on the topic Storage hall is processed in the form of project documentation for the realization of the new building. This building is projected on a plot 2828/108, 2828/106, 2828/105, 2828/104, 2828/222 and 2828/107 in the cadastral area Brno – Cernovice. This building is adjoined to the existing production hall and is divided into two parts. This parts are storage and administration. The administrative part has two floors and includes office space and hygienic facilities for own employees. The storage part is determined for storing of plastic products.

The thesis describes the analysis and design part of reinforced concrete frame structure. Calculation was made by program SCIA Engineer and verified by manual calculations using simplified methods. Static solution includes an assessment of floor slabs, columns and stairs. The output is then individual drawings of reinforcement. The thesis also includes a study determining the effective width for single rib.

Theme of the diploma thesis is a construction technology project extension of the building of the Supreme Court of the Czech Republic in Brno. The content of the diploma thesis is the study of the main technological stages of the main building, solution of wider transport relations with a focus on building supply, objects schedule, time schedule of the main building. The work also includes the project of construction site equipment, design of the main construction machines and mechanisms, technological regulations for special foundations and rough construction, which are supplemented by control and test plans and a plan for securing material resources. As part of other assignments, As part of other assignments, I process occupational health and safety, ecology and environmental protection for selected construction processes, itemized budget for special foundation and rough construction

The subject of the diploma thesis is to elaborate a selected part of the construction technology project for Apartment complex Kadetka - preparation for building realisation. Specifically, this is an underground garage and object C. In the course of the creation of project, the objects A and B, incorporated in the project of the construction site equipment, were also taken into account. The content of the work is a technical report to the construction technology project, evaluation of transport routes, time and financial plan, individual realization phases of the main building phase, design of the main building machine and mechanisms, time schedule for rough construction, plan for securing material resources, elaboration of technology regulations for underground monolithic reinforced concrete structures and check and test plan. The thesis also includes an item budget for the apartment house made with Build Power S software.

The purpose of the work is to study the effect of fiber on the physical and mechanical characteristics of concrete and to develop recommendations for the production of dispersed reinforced structures. As a result of the research work, the principles of optimizing the structure of fiber concrete due to the influence of fiber length on the mechanical strength properties are proposed. Using graphical methods derived statistical dependence of the qualitative characteristics (prism strength, modulus of elasticity, Poisson's ratio) of fiber-reinforced concrete from prescription-technological parameters of the dispersed reinforcement, which improves the bearing capacity of concrete structures or to reduce the amount of steel reinforcement. / Цель работы - изучение влияния фибры на физико-механические характеристики бетона и разработка рекомендаций по изготовлению дисперсно-армированных конструкций. В результате проведенной исследовательской работы предложены принципы оптимизации структуры фибробетона за счет влияния длины волокон на механико-прочностные свойства. С помощью графических методов выведены статистические зависимости качественных характеристик (призменная прочность, модуль упругости, коэффициент Пуассона) фибробетонов от рецептурно-технологических параметров дисперсного армирования, что позволяет повышать несущую способность бетонных конструкций или уменьшать расход стальной арматуры.