Abstract
ABSTRACT: The present work aims to compare the structural behavior of steel-concrete composite-section beams for three types of shear connectors made of U hot rolled section and cold-formed sections of U and L. Experimental tests were performed with the three types of connectors associated with I section laminated steel beams and reinforced concrete slabs. For each type of connector, three push-out tests were performed, as well as six simple supported beam tests to evaluate the positive bending moment region. The results indicated that the direct shear behavior among the different types of connectors presents significant differences, however they do not significantly influence the average flexural strength of the composite beams. These, however, present considerable differences in deflections and deformations due to the stiffness differences of the connectors.
Highlights
The present work aims to compare the structural behavior of steel-concrete composite-section beams for three types of shear connectors made of U hot rolled section and cold-formed sections of U and L
Regarding the maximum resistant capacity per connector (Qmax) measurement, the lowest value obtained in the experiments was disregarded due to the significant variability that can occur among the values for the same type of connector
In order to measure the experiment, the results found were compared with the model proposed in the standard [15] for cold-formed and hot rolled U section, in addition to the model proposed by [16] for cold-formed U sections (Table 5)
Summary
The present work aims to compare the structural behavior of steel-concrete composite-section beams for three types of shear connectors made of U hot rolled section and cold-formed sections of U and L. The results indicated that the direct shear behavior among the different types of connectors presents significant differences, they do not significantly influence the average flexural strength of the composite beams. Resumo: O presente trabalho tem como objetivo comparar o comportamento estrutural de vigas com seção mista de aço-concreto, para três tipos de conectores de cisalhamento, confeccionados em perfil laminado de seção U e em perfis metálicos formados a frio de seções U e L. Para cada tipo de conector foram realizados três ensaios de cisalhamento direto, além de dois ensaios em vigas mistas simplesmente apoiadas para avaliação da região de flexão simples. Zoccoli advantages of composite systems result from the fact that the steel and concrete elements can work subjected to tensile and compression efforts, respectively, a situation in which it is possible to explore the main mechanical properties of each material [1]
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