Apresenta-se neste trabalho a análise numérica de um edifício de 32 pavimentos, em concreto armado, situado na cidade do Recife. Primeiramente foi realizada a modelagem pelo método dos elementos finitos apenas para a estrutura em concreto. Em seguida realizou-se a modelagem considerando o efeito dos painéis de alvenaria de vedação no comportamento estrutural do edifício, através do modelo de barras diagonais equivalentes. E, depois, a modelagem mais refinada de alguns desses painéis, submetidos ao carregamento proveniente dos pórticos. Os resultados obtidos nos processamentos dos modelos com barras equivalentes e sem elas foram comparados entre si, a fim de se analisarem as reações de apoio e deslocamentos no topo do edifício para os dois modelos. Constatou-se um aumento na rigidez do edifício, bem como a redistribuição dos esforços. Foram analisados também os esforços nos painéis de alvenaria a fim de se verificar em que pavimentos e em que geometria de pórticos as alvenarias estavam sujeitas a maiores tensões / The work presents results from numerical analyses performed in a 32-storey reinforced concrete building in Recife. Numerical finite element analyses were performed taking into account the modeling of reinforced concrete members only as well as the masonry infill panels, considered as equivalent diagonal struts. It was also analyzed a more refined model consisting of isolated infill masonry panels subjected to frame loading from 3-D finite element analyses. Support reaction, stress resultants and displacements on the top of the buildings, obtained from performed analyses, were compared. An increase in building stiffness was observed as well as stress resultant redistribution. Infill masonry panel stresses were also investigated in order to find out the places where it is most stressed

Made available in DSpace on 2017-06-01T17:57:20Z (GMT). No. of bitstreams: 1 Elilde Medeiros.pdf: 1143833 bytes, checksum: 753821a53256142f318470c59cb69f82 (MD5) Previous issue date: 2007-08-17 / The work presents results from numerical analyses performed in a 32-storey reinforced concrete building in Recife. Numerical finite element analyses were performed taking into account the modeling of reinforced concrete members only as well as the masonry infill panels, considered as equivalent diagonal struts. It was also analyzed a more refined model consisting of isolated infill masonry panels subjected to frame loading from 3-D finite element analyses. Support reaction, stress resultants and displacements on the top of the buildings, obtained from performed analyses, were compared. An increase in building stiffness was observed as well as stress resultant redistribution. Infill masonry panel stresses were also investigated in order to find out the places where it is most stressed / Apresenta-se neste trabalho a análise numérica de um edifício de 32 pavimentos, em concreto armado, situado na cidade do Recife. Primeiramente foi realizada a modelagem pelo método dos elementos finitos apenas para a estrutura em concreto. Em seguida realizou-se a modelagem considerando o efeito dos painéis de alvenaria de vedação no comportamento estrutural do edifício, através do modelo de barras diagonais equivalentes. E, depois, a modelagem mais refinada de alguns desses painéis, submetidos ao carregamento proveniente dos pórticos. Os resultados obtidos nos processamentos dos modelos com barras equivalentes e sem elas foram comparados entre si, a fim de se analisarem as reações de apoio e deslocamentos no topo do edifício para os dois modelos. Constatou-se um aumento na rigidez do edifício, bem como a redistribuição dos esforços. Foram analisados também os esforços nos painéis de alvenaria a fim de se verificar em que pavimentos e em que geometria de pórticos as alvenarias estavam sujeitas a maiores tensões

Made available in DSpace on 2017-06-01T17:57:34Z (GMT). No. of bitstreams: 1 pre-textual.pdf: 116369 bytes, checksum: 5b5524dbf0f0e113a677f87352842f60 (MD5) Previous issue date: 2006-06-30 / In March of 2004 the new version of the Brazilian Code for design of concrete structures, the NBR 6118(2003), has replaced its predecessor the NBR 6118(1978). Amongst the new presented concepts, the greatest impact is related to the question of the durability of the concrete structures. The present work evaluates the influence of the new normative criteria, with emphasis to the analysis of costs, in the structural design of three buildings of reinforced concrete of varied heights. The influence in the costs of the structures is analyzed, when designed in the different exposure classes related environmental conditions II and III, of the value adopted for the compressive resistance fck, of the use of models I and II for the calculation of the reinforcement of shear of beams, of the influence of the design of them columns with the new criteria of the minimum moment of first local order and geometric imperfections. Finally, it has been compared the global costs of the structures of the three buildings when designed according to criteria of NBR-6118(1978) and NBR- 6118(2003). The results had mainly shown that, despite the increase in concrete volume in accordance with the NBR 6118 (2003), the amount of steel was reduced, in them columns, in relation the NBR 6118(1978). The difference in final costs of the structures was favorable to the NBR 6118(1978), but it can be considered relatively low, in comparison with the increasing quality and durability proportioned by the adoption the NBR 6118(2003) / Em Março de 2004 entrou em vigor a nova versão da norma brasileira para projeto de estruturas de concreto, a NBR 6118(2003), substituindo sua antecessora que estava em vigor desde 1978. Dentre os novos conceitos apresentados, os de maior impacto no meio técnico estão relacionados à questão da durabilidade das estruturas de concreto. Assim o presente trabalho pretende avaliar a magnitude destas alterações, com ênfase à análise de custos, que ocorrem devido à aplicação dos novos conceitos normativos no Projeto estrutural de três edifícios de concreto armado de alturas variadas. Desta forma, será avaliado o impacto econômico sobre o Projeto dos edifícios, para valores de cobrimentos de concreto relativos as classes de agressividade ambiental CAA=II e CAA=III, a influência nos custos das estruturas, do valor da resistência à compressão do concreto fck, as vantagens da utilização dos modelos I e II para o cálculo das armaduras de cisalhamento de vigas. Também serão abordados o Projeto dos pilares com os novos critérios do momento mínimo de 1ª ordem e imperfeições geométricas locais, a ordem de grandeza dos esforços devidos ao desaprumo frente aos esforços devidos ao vento, e finalmente o impacto no custo global das estruturas dos edifícios, quando dimensionados segundo os critérios presentes na NBR-6118(1978) e NBR-6118(2003). Os resultados mostraram que, apesar do maior volume de concreto nos projetos de acordo com a NBR 6118(2003), a quantidade de aço foi reduzida, principalmente nos pilares,em relação a NBR 6118(1978). A diferença entre os custos finais das estruturas foi a favor da NBR 6118(2003)

The main idea in dealing with my thesis was to design a high quality public space where people will feel comfortable, safely and have a reason to come back. Furthermore, this is the place to be full of life and will serve the general public. The cultural center, that was designed, to become part of Královo Pole cultural campus, so-called K2-center, which will create a basis for free time activities, relaxation and education. A significant part of the proposed building is made up of multi-functional hall, library, restaurant, teen center and spaces for leisure time activities. On the ground floor will be located business parter and coffee bar. The aim of my project was to take into account what is most needed for inhabitants of Královo Pole for the purpose to meet the demands for quality leisure time for the widest spectrum of people. There is an effort to place the object itself as the most sensitive, given the current surrounding areas. The aim was not to design a huge object but especially a pleasant environment functioning as a center of leisure time activities.

The subject of this diploma thesis is processing of a construction technological project for the preparation of the realization of a high-rise residential building in Bratislava. The thesis is based on construction technology solution. The content of thesis is a technical report, coordination situation with broader transport relations, time and financial plan, study of realization of technological stages, solution of construction organization including drawing of construction site, design of main construction machines and mechanisms, technological regulation for upsite monolithic construction, control and testing plan, item budget, detail of relief elements of the ceiling structure, drawing of the formwork of the ceiling structural floor, specific research in the field of tower cranes.

Der Bausektor wird von Politik und Öffentlichkeit als einer der größten Verbraucher von Ressourcen und als Verursacher hoher CO2-Emissionen wahrgenommen und steht deshalb bereits seit längerem im Fokus von Klimaschutz- und Nachhaltigkeitsdiskussionen. Zur Unterstützung der im „Grünen Deal“ der EU und im Klimaschutzgesetz (KSG) der Bundesrepublik vorgezeichneten ambitionierten Ziele hat der DAfStb eine Roadmap „Nachhaltig bauen mit Beton“ erarbeitet. Diese beinhaltet konkrete kurz- und mittelfristige Maßnahmen zur Umsetzung der Nachhaltigkeitsziele, aus denen dann weitere langfristig angelegte Vorhaben (Forschung, Richtlinien, Normung) entwickelt werden.

Against the background of global warming and the associated need to drastically reduce energy and resource consumption, action must also be taken in the building sector. Resource-efficient construction methods must be used that nevertheless allow the increasing construction tasks in areas such as infrastructure and housing to continue to be fulfilled. In order to successfully introduce a new construction method to the market, the aspects of recyclability and economic efficiency are essential, in addition to important government requirements for climate neutrality and technical performance. Above all, the economic viability, that is, the economic advantageousness, as well as its simple applicability compared to competing systems, decides on the success and widespread use of a new technology. Carbon reinforced concrete, with its outstanding technical properties and simultaneous material efficiency, is an important building block toward climate neutrality in the construction industry. It is a promising technology that still has to prove its economic advantages and robust applicability under market conditions. In addition to the infrastructure sector, there is great potential in the area of housing creation, which needs to be tapped for carbon reinforced concrete. For this challenge, it is necessary to design a competitive value chain that allows the realization of marketable products in mass production on existing plant technology. The article gives a short overview of the economic and ecological status quo in the field of prefabricated construction with carbon concrete, using the example of the C3-result building CUBE. In particular, the CUBE-BOX, which is made of prefabricated and semi-prefabricated parts, is examined in more detail and the carbon reinforced concrete components used are compared with classic reinforced concrete constructions in terms of sustainability. In this context, the conceivable global climate protection contribution of the carbon reinforced concrete construction method is forecast based on potential market segments.

Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2010. / ENGLISH ABSTRACT: Reinforced concrete structures, designed according to proper capacity design guidelines, can deform inelastically without loss of strength. Therefore, such structures need not be designed for full elastic seismic demand, but could be designed for a reduced demand. In codified design procedures this reduced demand is obtained by dividing the full elastic seismic demand by a code-defined behaviour factor. There is however not any consensus in the international community regarding the appropriate value to be assigned to the behaviour factor. This is evident in the wide range of behaviour factor values specified by international design codes. The purpose of this study is to assess the seismic drift of reinforced concrete structural walls in order to evaluate the current value of the behaviour factor prescribed by SANS 10160-4 (2009). This is done by comparing displacement demand to displacement capacity for a series of structural walls. Displacement demand is calculated according to equivalency principles (equal displacement principle and equal energy principle) and verified by means of a series of inelastic time history analyses (ITHA). In the application of the equivalency rules the fundamental periods of the structural walls were based on cracked sectional stiffness from moment-curvature analyses. Displacement capacity is defined by seismic design codes in terms of inter storey drift limits, with the purpose of preventing non-structural damage in building structures. In this study both the displacement demand and displacement capacity were converted to ductility to enable comparison. The first step in seismic force-based design is the estimation of the fundamental period of the structure. The influence of this first crucial step is investigated in this study by considering two period estimation methods. Firstly, the fundamental period may be calculated from an equation provided by the design code which depends on the height of the building. This equation is known to overestimate acceleration demand, and underestimate displacement demand. The second period estimation method involves an iterative procedure where the stiffness of the structure is based on the cracked sectional stiffness obtained from moment-curvature analysis. This method provides a more realistic estimate of the fundamental period of structures, but due to its iterative nature it is not often applied in design practice. It was found that, regardless of the design method, the current behaviour factor value prescribed in SANS 10160-4 (2010) is adequate to ensure that inter storey drift of structural walls would not exceed code-defined drift limits. Negligible difference between the equivalency principles and ITHA was observed. / AFRIKAANSE OPSOMMING: Gewapende beton strukture wat ontwerp is volgens goeie kapasiteitsontwerp-riglyne kan plasties vervorm sonder verlies aan sterkte. Gevolglik hoef hierdie strukture nie vir die volle elastiese seismiese aanvraag ontwerp te word nie, maar kan vir 'n verminderde aanvraag ontwerp word. In gekodifiseerde ontwerpriglyne word so 'n verminderde aanvraag verkry deur die volle elastiese aanvraag te deel deur 'n kode-gedefinieerde gedragsfaktor. Wat egter duidelik blyk uit die wye reeks van gedragsfaktor waardes in internasionale ontwerp kodes, is dat daar geen konsensus bestaan in die internasionale gemeenskap met betrekking tot die geskikte waarde van die gedragsfaktor nie. Die doel van hierdie studie is om seismiese verplasing van gewapende beton skuifmure te evalueer ten einde die waarde van die gedragsfaktor wat tans deur SANS 10160-4 (2009) voorgeskryf word te assesseer. Dit word gedoen deur verplasingsaanvraag te vergelyk met verplasingskapasiteit. In hierdie studie word verplasingsaanvraag bereken deur middel van gelykheidsbeginsels (gelyke verplasingsbeginsel en gelyke energiebeginsel) en bevestig deur middel van nie-elastiese tydsgeskiedenis analises (NTGA). Die effek van versagting as gevolg van nie-elastiese gedrag word in aanmerking geneem in die toepassing van die gelykheidsbeginsels. Verplasingskapasiteit word deur seismiese ontwerpkodes gedefinieer deur perke te stel op die relatiewe laterale beweging tussen verdiepings, met die doel om nie-strukturele skade te verhoed. Om verplasingsaanvraag en -kapasiteit te vergelyk in hierdie studie, word beide omgeskakel na verplasingsduktiliteit. Die eerste stap in kraggebaseerde seismiese ontwerp is om die fundamentele periode te beraam. Die invloed van hierdie eerste kritiese stap word in hierdie studie aangespreek deur twee periodeberamingsmetodes te ondersoek. Eerstens kan die fundamentele periode bereken word deur 'n vergelyking wat 'n funksie is van die hoogte van die gebou. Dit is egter algemeen bekend dat hierdie vergelyking versnellingsaanvraag oorskat en verplasingsaanvraag onderskat. Die tweede metode behels 'n iteratiewe prosedure waar die styfheid van die struktuur gebaseer word op die gekraakte snit eienskappe, verkry vanaf 'n moment-krommingsanalise. 'n Beter beraming van die fundamentele periode word verkry deur hierdie metode, maar as gevolg van die iteratiewe aard van die metode word dit selde toegepas in ontwerppraktyk. Die resultate van hierdie studie toon dat die huidige waarde van die gedragfaktor soos voorgeskryf in SANS 10160-4 (2010) geskik is om te verseker dat die relatiewe laterale beweging tussen verdiepings binne kode-gedefinieerde perke sal bly. Onbeduidende verskil is waargeneem tussen die resultate van gelykheidsbeginsels en NTGA.

The subject of this diploma thesis is technological preparation of realization guest – house Jánský potok II. in Jánské Lázně. The diploma thesis contains study of the main technological phases of the object, project of the site equipment, useful machines, time schedule, budget, technological prescription for reinforced concrete construction, project of the formwork for wall and floor slab, control plan, project of the acces road and parking. The basis for technological preparation in this diploma thesis is design documentation.

Content of this master‘s thesis is construction technological project of the extension Senior Centrum Blansko. The main object is a three-storyed, designed as a monolithic skeleton construction. The masters’s thesis contains technical report of the construction technological project, suggested construction site installations, proposal of suitable machines and mechanisms required for construction, time schedule, budget, wider relations of transport lines to construction site, implementation of monolithic concrete structures and control and test plan.