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Tecnologia de painéis pré-fabricados arquitetônicos de concreto para emprego em fachadas de edifícios. ; The arquitectural precast concrete panel technology used in buildings facades.

Oliveira, Luciana Alves de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 17/10/2002 PT
Relevância na Pesquisa
36.98%
A utilização de tecnologias construtivas inovadoras, como os painéis pré-fabricados arquitetônicos de concreto (PPAC), tem-se configurado prática frequente do mercado brasileiro por, potencialmente, contribuir para incrementar os níveis de industrialização dos processos de produção, bem como a qualidade do produto final a custos reduzidos. No Brasil, entretanto, não existem ainda normas ou manuais técnicos que balizem a utilização dessa tecnologia construtiva. Por isso, este trabalho sistematiza o conhecimento sobre a tecnologia de PPAC para emprego em fachadas de edifícios de múltiplos pavimentos, por meio da apresentação dos principais fatores que devem ser considerados nas fases de elaboração dos projetos de empreendimentos que utilizem os PPAC em suas fachadas. Fatores esses, que condicionam o desempenho e a eficiência do processo de produção das fachadas. Após o acompanhamento do processo de produção de dois empreendimentos que utilizaram PPAC em suas fachadas, constituindo os estudos de caso, conclui-se que a tecnologia de PPAC apresenta grande potencial para incrementar os níveis de industrialização do processo de produção do edifício, se a elaboração dos seus projetos ocorrer nas fases preliminares da concepção do empreendimento...

Otimização de componentes de concreto pré-moldado protendidos mediante algoritmos genéticos ; Optimization of precast prestressed elements using genetic algorithms

Castilho, Vanessa Cristina de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 13/02/2003 PT
Relevância na Pesquisa
36.58%
Este trabalho trata da otimização de painéis alveolares e vigotas protendidas utilizando Algoritmos Genéticos (AGs). A proposta de tal algoritmo foi inspirada no princípio da seleção natural de indivíduos, onde o mais ‘apto’ tende a permanecer na população e se reproduzir, passando seu código genético para a próxima geração. Em alguns casos, esse método pode alcançar melhores soluções se comparados aos métodos tradicionais de otimização. O principal objetivo do trabalho é investigar o uso de AG como uma técnica para a minimização da função custo da aplicação de painéis alveolares e vigotas protendidas. Na análise estão incluídas as verificações dos elementos nas etapas transitórias referentes à produção, transporte e montagem. A função custo é avaliada considerando valores da realidade brasileira. O trabalho de pesquisa compara os resultados obtidos utilizando AGs com aqueles obtidos utilizando o método de otimização convencional conhecido como método do Lagrangiano Aumentado. Os resultados obtidos por ambos os métodos evidenciam a eficácia dos AGs com relação ao método convencional. Foram propostas e analisadas três famílias do AG simples, buscando identificar, dentre seus elementos...

Cost competitive steel fibre reinforced self-compacting concrete for structural applications

Barros, Joaquim A. O.; Lourenço, Lúcio; Varma, R. K.; Gonçalves, Delfina
Fonte: The Associated Cement Companies Limited Publicador: The Associated Cement Companies Limited
Tipo: Artigo de Revista Científica
Publicado em /08/2009 ENG
Relevância na Pesquisa
16.58%
The present work resumes the research carried out to develop a cost competitive Steel Fibre Reinforced Self-Compacting Concrete (SFRSCC) for structural applications, such is the case of lightweight panels for building facades. A mix design method was developed taking into account the influence that fibres introduce in the skeleton phase of the composition. The concrete precast industry is one of the most suited industries for the use of SFRSCC, due to the possibility of assuring high levels of quality control from the mix composition phase up to the curing process of the manufactured structural elements. Since demoulding of the precast elements should be executed as earliest as possible, due to economic and stock management reasons, the influence of age on the SFRSCC mechanical properties was assessed carrying out compression and flexural tests. Compression and monotonic cyclic tests were also carried out to assess the predictive performance of analytical formulations. To appraise the structural possibilities of the developed SFRSCC, panel prototypes were subject to flexural and punching load configurations. The obtained results showed the great benefits provided by the fibre reinforcement mechanisms. Finally, a real scale panel was constructed and tested in an industrial environment...

Flexural and shear behaviour of precast sandwich slabs comprising thin walled steel fibre reinforced self-compacting concrete

Sousa, Christoph Fernandes; Barros, Joaquim A. O.; Azenha, Miguel; Lameiras, Rodrigo
Fonte: RILEM Publicador: RILEM
Tipo: Conferência ou Objeto de Conferência
Publicado em //2013 ENG
Relevância na Pesquisa
26.15%
Publicado em "Rheology and processing of construction materials", ISBN 978-2-35158-137-7; Insulated sandwich panels are often composed of external concrete layers, mechanically connected through metallic elements, such as trusses. Due to their high thermal conductivity, metallic connectors tend to cause thermal bridges on the building envelope. In view of this problem, an innovative solution for sandwich slabs is proposed within the framework of a pre-fabricated modular housing system. The referred slabs are based on a sandwich solution composed by two thin layers of Steel Fibre Reinforced Self-Compacting Concrete (SFRSCC) that are connected by thin perforated plates of Glass Fibre Reinforced Polymer (GFRP), used together with a thermal insulation core-layer. The bottom concrete layer is reinforced with conventional steel rebars and steel fibres, whereas the upper one does not have conventional reinforcement. This paper presents a preliminary experimental program aiming to assess the flexural and shear behaviour of this type of sandwich panel solution. The obtained results confirm the feasibility of the proposed sandwich slab system, revealing its capacity in terms of load carrying capacity and ductility performance. In addition...

Technological rules and constraints affecting design of precast concrete housing

Nakamura, Takashi
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 117 leaves; 9760588 bytes; 9760350 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
26.8%
Precast concrete technology is of great importance in multifamily housing. This technology provides the possibility to the industrialize housing construction and thus enhance the availability and quality of houses. With regard to the design process of precast concrete housing, architectural and technological concepts have to be woven into housing systems by iterative processes. Although precast concrete technology is an offshoot of reinforced concrete technology, its structural nature and construction process is not the same: its identification with the concept of industrialization makes this technology quite different from cast-in-place concrete. In other words, the processes of precasting, of transportation and handling, and of the erection of precast concrete building systems give significant advantages to housing systems, but they pose technological constraints to as well. This thesis investigates the technological rules and constraints of precast concrete structural systems which provide technological approaches to precast concrete housing systems. First, the methodology of the considerations of structural systems is introduced. Second, the technological rules and constraints of precasting, transportation, and construction methods are discussed in detail. Then...

Interação entre painéis pré-moldados de concreto e a estrutura principal por meio de modelos numéricos em elementos finitos; Interaction between precast concrete panels and the main structure via numerical models in finite elements

Paula, Gisandra Faria de
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Dissertação
POR
Relevância na Pesquisa
36.88%
Os painéis pré-moldados de concreto apresentam função arquitetônica e estrutural importante para as edificações, tendo o seu uso intensificado no Brasil. Estudos anteriores mostram a contribuição dos painéis em reduzir os esforços e deslocamentos da estrutura principal, resultando em estruturas mais econômicas. Este trabalho avalia a interação dos painéis com a estrutura principal por meio de análise numérica utilizando o software ANSYS (versão 9.0), sob o efeito das ações laterais. São desenvolvidas duas análises de estruturas de pavimento único (galpão), uma constituída por painéis verticais fixados na viga e outra por painéis horizontais fixados nos pilares, utilizando-se os elementos finitos SOLID65, SOLID45, SHELL63, BEAM4, BEAM44, TARGE170 E CONTA173. Os resultados obtidos mostram que os painéis contribuem no enrijecimento da estrutura principal, promovendo uma diminuição dos deslocamentos da estrutura. Verifica-se, também, que este enrijecimento ocasiona solicitações nos painéis e nas ligações, sendo estas as mais críticas e, muitas vezes, não são consideradas no projeto estrutural. Na segunda análise, com os painéis horizontais fixados nos pilares por meio de chapas metálicas de ligação...

Análise numérica de painéis pré-moldados de fechamento em edificações de pequena altura ; Numerical analysis of precast panels in small height buildings

Freitas, Harisson Silva de
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Dissertação
POR
Relevância na Pesquisa
46.66%
A construção civil tem intensificado esforços na busca e implementação de estratégias de modernização do setor, em que a racionalização dos processos construtivos tem um papel fundamental. As tendências mais notáveis relacionam-se ao emprego de sistemas, totalmente ou parcialmente pré-fabricados, capazes de maximizar o potencial de racionalização dos processos de execução. O emprego de sistemas racionalizados de fechamento como os painéis pré-moldados permite aliar racionalização à velocidade de produção do subsistema vedação. Neste contexto, este trabalho visa analisar alguns problemas importantes decorrentes do uso de painéis pré-moldados de fechamento em edificações de pequena altura ou até 3 pavimentos, aplicação esta que tem se tornado muito usual no país. Os elementos de análise são os tipos de ligação painel-estrutura tanto para as ligações de gravidade quanto de contraventamento, efeitos térmicos nos painéis e nas ligações e posicionamento das juntas de dilatação. São desenvolvidas análises numéricas utilizando o programa computacional ANSYS para modelagem do problema considerando elementos sólidos. O comportamento não-linear físico dos materiais envolvidos é considerado nas simulações...

Development of a Precast Concrete Supertile Roofing System for the Mitigation of Extreme Wind Events

Mintz, Brandon L
Fonte: FIU Digital Commons Publicador: FIU Digital Commons
Tipo: Artigo de Revista Científica Formato: application/pdf
Relevância na Pesquisa
36.58%
Residential roofs have traditionally formed the weakest part of the structure. The connections of roofs to the walls has lacked a clear load path with the result that the structure is weak at this point, leading to the compromise of the structure. Indeed roofs have multiple points of failure that lead to the weakness of the residential structure as a whole. Even if structural failure does not occur, compromise the roofing membrane can lead to high repair costs and property loss. The failure lies in the complex forming of the roof components as the roof aesthetics are placed to protect the underlayment and the underlayment protects the sheathing and trusses. However, the aesthetics, such as the roof tile, not being structural can be damaged easily and lead to the compromise of the roofing system as well as endangering surrounding structures. The shape of the roof tile lends itself well to structural design. The wave motion leads to structural redundancy and provides a significant ability to provide stiffness. Using the shape of the roof tile, a structure can be created to encapsulate the shape and provide structural strength. The aesthetics are already accounted for in the shape and the shape is strengthened according to necessity. A system has been devised for flexural strength and applicable connections to demonstrate the constructability and feasibility of creating and using such a system. Design concepts are accounted for...

Qualificazione sperimentale di materiali siliconici per giunti di pannelli prefabbricati

BIONDINI Fabio; DAL LAGO Bruno; LAMPERTI TORNAGHI MARCO; TONIOLO Giandomenico
Fonte: AICAP Publicador: AICAP
Tipo: Contributions to Conferences Formato: Printed
ITA
Relevância na Pesquisa
16.39%
Recent earthquakes highlighted the inadequacy of the current design criteria for the connection system of the cladding wall panels of precast buildings. A systematic solution to this problem consists in realising an isostatic panel-to-structure connection system that allows a seismic response of the frame structure with no reaction forces into the connections of the panels. This can be achieved by supporting each panel to the structure with two hinges, one at the top and one at the bottom, so to have a pure frame behaviour with a rigid-body motion of the pendulum arrangement of panels. However, the silicone sealant needed in between the joints can provide a certain degree of contrast to the pendulum motion. In order to quantify this contribution, a series of experimental tests has been carried out on both small assemblages of concrete blocks jointed with silicone strips and structural sub-assembly made by two full scale cladding panels with pendulum arrangement. This paper presents the results of the experimental tests and provides specific considerations about the possible influence of silicone joints on the seismic response of the frame-panel structural assembly.; JRC.G.4-European laboratory for structural assessment

The role of claddings in the seismic response of precast structures: the SAFECLADDING full-scale tests

NEGRO Paolo; LAMPERTI TORNAGHI MARCO
Fonte: European Association for Earthquake Engineering Publicador: European Association for Earthquake Engineering
Tipo: Contributions to Conferences Formato: CD-ROM
ENG
Relevância na Pesquisa
26.98%
The knowledge gained with different research projects, focused on seismic performance of precast reinforced-concrete buildings and during different earthquakes, permits to observe that the frame resisting systems, if designed for seismic actions, maintain their efficiency. On the contrary, the façade cladding and the connections between structure and panels, can meet with failure. These observations draw the attention to the need of further research on this field. The SAFECLADDING Project was started to tackle this issue with the aim to Improve Fastening Systems of Cladding Panels for Precast Buildings in Seismic Zones. It is a Research Project for SMEs associations, granted by EU FP7 which involves seven industrial partners: enterprises, European or national associations of precast concrete producers; four universities and the European Laboratory for Structural Assessment (ELSA). The SAFECLADDING Project analyses the ways to improve the performance of existing buildings, as well as the new ones. Three different Approaches can be followed to enhance the connections in frame-cladding system: Isostatic, Integrated, and Dissipative. The experiment, the mock-up and the test sequence were designed to assess the most common cladding systems using the same frame structure. The mock-up is a single-storey building made by six square columns...

Implementation of microencapsulated PCM as concrete addition in prefabricated radiant-walls solutions. A feasibility study of the combination of Micronal & In-Term Klimavaeg, as an in-space thermal energy storage solution for heating applications

Marcos Mesón, Víctor
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Dissertação de Mestrado
ENG
Relevância na Pesquisa
26.15%
Traditional heating and cooling solutions are currently being replaced with new low-temperature technologies, which reduce energy consumptions and reach a more sustainable approach.The current status of the European construction sector and the European energetic plans Europe 2020 and Europe 2050, presenta potentialmarket expansion in the energetic renovation area. As one of the main emitter technologies, the implementation of radiant heating and cooling in constructive elements such as radian!floors, walls and ceilings has experienced a considerable growth during the last decade in Europe, and is highlighted as one of the most efficient heating and cooling solutions available. The comparison of the principal radian!wall panel manufacturers in the European market shows a lack of products with high TES capacity, which opens a field for innovative products reaching greater thermal mass values. The implementation of PCM in construction products (laten!heat) allows the improvement of the TES capacity of these materials without increasing the volume of the element or rising the element temperatures. The present study analyses the feasibility of integrating BASF Micronal (microencapsulated PCM) in the concrete layer of a prefabricated radian!wall element (ln-therrn Klimavceg). This research is focused on the increase of the TES capacity of the element...

Nave Industrial en Polígono Industrial Tanos-Viérnoles; Industrial unit in Industrial Park Tanos-Viérnoles

Ezquerra Diego, Eduardo
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Trabalho de Conclusão de Curso
SPA
Relevância na Pesquisa
16.54%
RESUMEN: Planteamiento del problema y desarrollo de la solución adoptada: Este proyecto constructivo busca definir una nave industrial con uso de almacenaje y distribución, y los elementos necesarios para el correcto funcionamiento de esta. Además de la propia nave, se necesita destinar parte de la parcela a oficinas para la gestión de todo el proceso logístico y parte a una tienda comercial al por menor con zona de exposición. El polígono dispone de parcelas de distintos tamaños que permiten ser seleccionadas en grupos para conseguir la superficie de parcela necesaria para el movimiento de los camiones y la edificación de la nave industrial y del edificio anexo, así como cumplir todas las dimensiones que nos exige la normativa urbanística de Torrelavega y el PSIR donde esta englobado el polígono. Debido a la necesidad de gran volumen de almacenaje se ha decidido el diseño de una nave industrial de 1847,03 m2 de superficie, altura de 9 metros en alero y 11 metros en cumbrera. Ya que el uso principal es de almacenaje, el diseño de la nave así como sus funciones vienen limitadas por la colocación de baldas reforzadas con último nivel de superficie de apoyo a 6,10 m. Al ser necesaria la carga y descarga de productos se han colocado cuatro muelles de carga en un lateral de la nave así como una rampa que desciende un metro...

Development of a precast concrete supertile roofing system for the mitigation of extreme wind events

Mintz, Brandon
Fonte: FIU Digital Commons Publicador: FIU Digital Commons
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.31%
Residential roofs have traditionally formed the weakest part of the structure. The connections of roofs to the walls has lacked a clear load path with the result that the structure is weak at this point, leading to the compromise of the structure. Indeed roofs have multiple points of failure that lead to the weakness of the residential structure as a whole. Even if structural failure does not occur, compromise the roofing membrane can lead to high repair costs and property loss. The failure lies in the complex forming of the roof components as the roof aesthetics are placed to protect the underlayment and the underlayment protects the sheathing and trusses. However, the aesthetics, such as the roof tile, not being structural can be damaged easily and lead to the compromise of the roofing system as well as endangering surrounding structures. ^ The shape of the roof tile lends itself well to structural design. The wave motion leads to structural redundancy and provides a significant ability to provide stiffness. Using the shape of the roof tile, a structure can be created to encapsulate the shape and provide structural strength. The aesthetics are already accounted for in the shape and the shape is strengthened according to necessity. A system has been devised for flexural strength and applicable connections to demonstrate the constructability and feasibility of creating and using such a system. Design concepts are accounted for...

Experimental and analytical investigations of concrete bridge decks with structural FRP Stay-in-Place forms

Nelson, MARK
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
16.44%
Stay-In-Place (SIP) formwork systems are widely used for concrete slabs in industry due to their relative ease and speed of construction. Conventionally, corrugated metal sheets or precast panels are used as formwork. In recent years, the SIP formwork technique has been proposed in conjunction with Fiber Reinforced Polymer (FRP) composites. The resulting system combines the construction advantages of SIP formwork with the durability and corrosion resistance of FRP materials. Bridge decks are a particularly enticing application due to their exposure to harsh environmental conditions and the need for rapid construction to minimize traffic disruptions. This study broadly evaluates FRP SIP formwork for concrete bridge decks both experimentally and numerically. In total, 9 full scale bridge deck sections, 32 small scale decks and more than 40 auxiliary tests were conducted, including the construction and testing of a full bridge at scale. Additionally, a numerical model was developed to predict punching shear failure based on the theory of plates and shells. Experimental testing was conducted on two FRP SIP form configurations, namely flat plates with T-shape stiffeners and corrugated plates, and used a variety of different detailing and geometries. Some of the investigated parameters included the width effect of bridge deck section tests...

Connections and Fatigue Behaviour of Precast Concrete Insulated Sandwich Panels

Teixeira, Nathan
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
36.71%
This study investigates two aspects of precast concrete insulated sandwich wall panels, namely mechanical connections and fatigue behaviour. In the first part, flexural tests were performed on panels with various end support conditions, loading orientations, and reinforcement and shear connector materials. Bolted angle connections were used to simulate practical support conditions, while loads were applied in a manner to simulate windward pressure as well as suction. Panels with steel and basalt fibre-reinforced polymer (BFRP) longitudinal reinforcement were tested and compared. Discrete steel and BFRP shear connectors were also used and evaluated. The bolted angle connections provided partial end fixity, thereby increasing the overall strength and stiffness relative to identical panels simply supported by rollers during testing. In all cases the bolted connections succeeded in developing the full strength of the sandwich panels. Panels with steel reinforcement failed due to rupturing of flexural reinforcement, while a panel with BFRP reinforcement failed due to rupturing of shear connectors and crushing of concrete in one wythe. Panels loaded in the direction of wind pressure achieved higher peak loads than identical panels loaded to simulate suction. An analytical model accounting for material nonlinearity...

Behaviour of Partially Composite Precast Concrete Sandwich Panels under Flexural and Axial Loads

Tomlinson, DOUGLAS
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
36.66%
Precast concrete sandwich panels are commonly used on building exteriors. They are typically composed of two concrete wythes that surround rigid insulation. They are advantageous as they provide both structural and thermal resistance. The structural response of sandwich panels is heavily influenced by shear connectors that link the wythes together. This thesis presents a study on partially composite non-prestressed precast concrete wall panels. Nine flexure tests were conducted on a wall design incorporating ‘floating’ concrete studs and Glass Fibre Reinforced Polymer (GFRP) connectors. The studs encapsulate and stiffen the connectors, reducing shear deformations. Ultimate loads increased from 58 to 80% that of a composite section as the connectors’ reinforcement ratio increased from 2.6 to 9.8%. This design was optimized by reinforcing the studs and integrating them with the structural wythe; new connectors composed of angled steel or Basalt-FRP (BFRP) were used. The load-slip response of the new connector design was studied through 38 double shear push-through tests using various connector diameters and insertion angles. Larger connectors were stronger but more likely to pull out. Seven flexure tests were conducted on the new wall design reinforced with different combinations of steel and BFRP connectors and reinforcement. Composite action varied from 50 to 90% depending on connector and reinforcement material. Following this study...

STRUCTURAL AND STEADY-STATE THERMAL EXPERIMENTAL INVESTIGATIONS OF AN INSULATED SANDWICH PANEL

Woltman, Gregory
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
36.44%
Concrete-Insulation-Concrete Sandwich Panels with Glass Fibre Reinforced Polymer (GFRP) shear connectors can be a solution to increasing energy efficiency in building envelopes, while also providing many architectural, structural, and economic benefits for building designs. This study consists of extensive experimental investigation of the shear and thermal properties of a unique sandwich panel design, incorporating GFRP shear connectors and a concrete “stud” system. The goal of this study is to expand upon the knowledge of alternative connectors’ effect on structural and thermal properties of sandwich panels, and to develop a thermally, structurally, and economically efficient panel. In the structural phase fifty 254x254x900 mm specimens representing segments of the precast sandwich wall, comprising two concrete wythes and a concrete stud surrounded by insulation foam, were tested in a double shear configuration. Three types of GFRP connectors produced from available sand-coated and threaded rods were tested and compared to conventional steel and polymeric connectors. GFRP connector diameters varied from 6 to 13 mm, and spacing varied from 80 to 300 mm. Both circular and rectangular cross-sections were examined, along with various end treatments to compare with simple straight embedment. The shear strength of GFRP connectors ranged from 60 to 112 MPa...

Experimental and analytical research on seismic vulnerability of low-cost ferrocement dwelling houses

Bedoya-Ruiz D.; Hurtado J.E.; Pujades L.
Fonte: Universidade de Medellín Publicador: Universidade de Medellín
Tipo: Article; info:eu-repo/semantics/article
ENG
Relevância na Pesquisa
26.43%
Analytical and experimental research for determining the seismic vulnerability of ferrocement houses, which is a low-cost system using precast thin panels, is presented. The research comprises the following tasks: (a) a field survey on the ferrocement dwelling houses actually built in seismic regions in Colombia; (b) a cyclic load test on 1:1 scale models; (c) identification of the parameters of the Bouc-Wen hysteretic model for the observed panel behaviour; and (d) Monte Carlo simulations of models intended to estimate the fragility curves of the houses. Despite the models exhibiting stiffness degradation, it was concluded that the system is adequate for regions of moderate to high seismicity. © 2010 Taylor & Francis.

Design Essentials in Earthquake Resistant Buildings [Book Review]

Housner, George W.
Fonte: Seismological Society of America Publicador: Seismological Society of America
Tipo: Article; PeerReviewed Formato: application/pdf
Publicado em /06/1971
Relevância na Pesquisa
16.43%
This book was prepared by a committee of 25 Japanese earthquake engineers with the objective of providing a comprehensive account of the present status of earthquake-resistant construction methods. The 17 chapters comprising the book are: 1. General Considerations, 2. Earthquake- Resistant Calculations, 3. Foundations and Ground Conditions, 4. Wooden Structures, 5. Steel Structures, 6. Reinforced Concrete Structures, 7. Steel Reinforced Concrete Structures, 8. Shell Structures, 9. Prestressed Concrete Construction, 10. Reinforced Concrete Wall Construction, 11. Precast Reinforced Concrete Wall Construction, 12. Precast Reinforced Concrete Framework and Panel Construction, 13. Masonry Construction, 14. Reinforced Concrete Block Construction, 15. Construction of Parts of Buildings, 16. Vessel Structures, Steel Towers and Stacks, 17. Temporary Structures. This is an interesting book in that it gives the thinking of Japanese engineers on earthquake-resistant design. The wealth of information on practical engineering considerations should make it of particular interest to designers of structures in this country.

Painel pré-moldado de argamassa armada com vermiculita expandida e reforçado com fibras de vidro; Precast mortar panel with expanded vermiculite and fiberglass reinforcement

Araújo, Daniel de Lima; Cândido, Éricka da Silva
Fonte: Ricardo Prado Abreu Reis; brasil; UFG; Escola de Engenharia Civil - UFG Publicador: Ricardo Prado Abreu Reis; brasil; UFG; Escola de Engenharia Civil - UFG
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
46.86%
v.10, n. 3, p. 01-18, jul./set., 2015.; The aim of this study is to determine the mechanical behavior of precast mortar panels containing expanded vermiculite. Three types of panels are analyzed, i.e., solid panels, hollow core panels and modified hollow core panels formed of a lightweight mortar pre-panel enveloped by a thin layer of grout. The panels are reinforced with a mesh steel or fiberglass fabric. The mechanical behavior of panels is determined from bending tests or compression tests under static loading. The use of mortars with expanded vermiculite as lightweight aggregate decreases the flexural strength of panels, but increases their thermal insulation by up to 10%. The use of fiberglass fabric prevents sudden failure of the modified hollow core panels. The main finding of this study is the technical feasibility of lightweight panels made of pre-cast panel mortar and expanded vermiculite reinforced with fiberglass fabric.; Programa de Apoio à Publicações Periódicas Científicas (PROAPUPEC) da UFG; O objetivo deste trabalho é determinar o comportamento mecânico de painéis pré-moldados confeccionados com argamassa contendo apenas Vermiculita Expandida. São analisados três tipos de painéis, isto é, painéis maciços e painéis alveolares confeccionados apenas com argamassa e painéis vazados formados por um pré-painel de argamassa envolvido em uma fina camada de calda de cimento. Os painéis são reforçados com tela de aço eletrossoldada ou com tela de fibra de vidro. O comportamento mecânico dos painéis é caracterizado por meio de ensaios de flexão ou de compressão sob carregamento estático. A utilização da Vermiculita Expandida como agregado leve em argamassas para painéis diminuiu a resistência à tração na flexão dos painéis...