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Abstract(s)
O reforço estrutural ao longo das últimas décadas, assumiu uma crescente importância na construção civil. A necessidade de reforçar uma estrutura surge sempre que são necessárias alterações dos requisitos estruturais previstos na fase de projeto. O fato de muitas estruturas de betão armado estarem atingindo o fim da sua vida útil, a degradação prematura dos materiais, e os erros de conceção e execução também são razões que justificam intervenções estruturais de reforço. Por conseguinte, com a necessidade de uma resposta dos técnicos de engenharia, foram desenvolvidos métodos capazes de aumentar a capacidade resistente das estruturas de betão armado, a fim de solucionar o problema sem a necessidade de demolir ou realizar novas estruturas. Neste trabalho foi estudado o método de reforço estrutural de betão armado com chapas de aço aderidas externamente ao elemento estrutural. Esse sistema está entre as principais técnicas utilizadas de reforço. O trabalho apresenta um guia prático de como deve ser executado e dimensionado o reforço, os métodos de cálculo e análise dos esforços resistentes, os cuidados que devem ser tomados desde o projeto até a aplicação do reforço, e ensaios experimentais que comprovam a eficácia da técnica.
Structural strengthening has acquiring increasing importance in civil construction over the last decades. This is due to various situations among which changes to structural requirements planned in the design phase stand out because of their higher occurrence. The fact that many strengthened concrete structures are reaching the end of their service life, the premature degradation of materials and design and execution errors are also reasons that lead to strengthening. And due to the need for a response from the engineers, arising from the reasons mentioned above, methods have been developed which are capable of increasing the resistant capacity of strengthened concrete structures, in order to solve the problem without having to demolish or build new structures. In this work, the method of structural strengthening in strengthened concrete with steel plates externally adhered to the structure, which is one of the main materials used in structure strengthening, is studied. A practical guide of how it should be performed and designed, the calculation methods and analysis of the resistant strengths, the precautions that should be taken from the design to application of the strengthening and experimental assays that prove that this technique is efficient.
Structural strengthening has acquiring increasing importance in civil construction over the last decades. This is due to various situations among which changes to structural requirements planned in the design phase stand out because of their higher occurrence. The fact that many strengthened concrete structures are reaching the end of their service life, the premature degradation of materials and design and execution errors are also reasons that lead to strengthening. And due to the need for a response from the engineers, arising from the reasons mentioned above, methods have been developed which are capable of increasing the resistant capacity of strengthened concrete structures, in order to solve the problem without having to demolish or build new structures. In this work, the method of structural strengthening in strengthened concrete with steel plates externally adhered to the structure, which is one of the main materials used in structure strengthening, is studied. A practical guide of how it should be performed and designed, the calculation methods and analysis of the resistant strengths, the precautions that should be taken from the design to application of the strengthening and experimental assays that prove that this technique is efficient.
Description
Keywords
Estruturas de betão armado Reforço Alterações estruturais Chapas de aço Strengthened concrete structures Strengthening Structural changes Steel plates