Steel And Concrete
Mostrando 1-12 de 253 artigos, teses e dissertações.
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1. Optimum design of steel columns filled with concrete via genetic algorithm: environmental impact and cost analysis
Abstract The use of concrete-filled tubular columns as part of structural systems has steadily increased throughout the years. The growing demand for structural elements of this nature is a direct result of the possibility to use various cross-section shapes that have increased strength, along with resistance to fire and other corrosive agents. The main obje
REM - International Engineering Journal. Publicado em: 2022
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2. Mullite macro-needles for reinforcement of refractory castables
Abstract Ceramic macro-needles incorporation as reinforcement in commercial refractory castable was studied. Ceramic macro-needles (Ø2x20 mm) were made from kaolinite clay and gibbsite to obtain mullite as the main crystalline phase. Specimens with the ceramic reinforcement were evaluated by compression after being treated at two temperatures (815 and 1400
Cerâmica. Publicado em: 2022
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3. Numerical formulation for nonlinear analysis of concrete and steel shells with deformable connections
Abstract A two-dimensional interface finite element capable of associating flat shell elements positioned one above the other was developed. The implemented interface element can physically simulate the contact between the flat shell elements and connect the reference planes of the shell elements above and below it. The formulation presented allows considera
REM, Int. Eng. J.. Publicado em: 2021-09
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4. Numerical analysis of collapse modes in optimized design of alveolar Steel-concrete composite beams via genetic algorithms
Abstract The objective of this study is to present the formulation and applications of the optimization problem of steel-concrete composite alveolar beams. In addition to presenting the formulation, a comparative analysis of the predominant collapse modes is performed numerically via the finite element method. The optimization program was developed with the
REM, Int. Eng. J.. Publicado em: 2021-06
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5. Study of the interaction of concrete walls with the foundation structure
Abstract This article presents a study of the factors that influence the mechanism of soil-structure interaction with a pilot building having concrete walls and their impact on their performance. To illustrate the studies carried out, a numerical modeling of a four-floor concrete wall pilot building was performed, subjected to vertical actions, supported by
REM, Int. Eng. J.. Publicado em: 2021-06
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6. Composite floor system with CFS trussed beams, concrete slab and innovative shear connectors
Abstract Steel and concrete floor systems are widely applied for buildings and provide excellent structural response, optimized material consumption, reduced beam height, and improved bending strength and stiffness capacity. In recent years, many experimental investigations concerned with new alternatives addressed to efficient interaction between steel and
REM, Int. Eng. J.. Publicado em: 2020-03
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7. Post-elastic Deformation Characteristics of Hybrid Fibre Reinforced Concrete Composites
Abstract The present study was focused on evaluating the strength and failure properties of hybrid micro-fibre concretes containing micro brass and steel fibre additions. Experimental tests were conducted on different hybrid fibre concretes containing aligned fibres in the direction of beam axis and the relative mechanical performance was compared to randoml
Lat. Am. j. solids struct.. Publicado em: 10/01/2020
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8. Optimized dimensioning of steel-concrete composite beams
Resumo As seções mistas de aço e concreto estão cada vez mais sendo utilizadas na construção civil, tanto no cenário mundial quanto no Brasil. O trabalho conjunto do perfil de aço e da laje de concreto aumenta consideravelmente o desempenho do elemento estrutural misto devido ao aproveitamento das vantagens de cada material. Neste trabalho, é utiliz
Rev. IBRACON Estrut. Mater.. Publicado em: 13/12/2019
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9. Revised formula for predicting the long-term deflection multiplier of normal and high strength concrete
Abstract High strength concrete (HSC) has found many applications in civil engineering structures such as in high-rise buildings, and bridges. The mechanical properties of HSC are sometimes different than of normal strength concrete (NSC). In particular, HSC possess lower creep strains compared to NSC. As a result, members constructed using HSC have been fou
Rev. IBRACON Estrut. Mater.. Publicado em: 13/12/2019
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10. Nonlinear numerical analysis of composite slabs with steel decking
Resumo O comportamento das lajes mistas é governado pelo cisalhamento longitudinal na interface entre o aço e o concreto, que é desenvolvido em lajes sob flexão simples. O método m-k e o método da interação parcial, utilizados no cálculo da resistência ao cisalhamento na interface aço-concreto de lajes mistas, são baseados em ensaios experimentai
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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11. About the use of semi-continuity in simply supported composite steel and concrete beams, to remove fireproof coatings for standard-fire resistance requirement of less than 30 minutes
Resumo Estudos anteriores do comportamento sob ação do incêndio de vigas mistas de aço e concreto, sem instabilidades locais (ditas compactas), considerando a rigidez à flexão nos apoios fornecida pela armadura negativa longitudinal à viga (semicontinuidade), mostraram que não é possível justificar a ausência de revestimento contra fogo para tempo
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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12. Experimental evaluation on the structural behavior of truss shear connectors in composite steel-concrete beams
Resumo As estruturas mistas apresentam grandes vantagens quanto a aspectos estruturais e construtivos, sendo os conectores de cisalhamento determinantes para a obtenção da interação entre os elementos estruturais e para a distribuição dos esforços na estrutura, aproveitando-se de forma efetiva da potencialidade de cada material constituinte da estrutu
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019