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The assessment of the impact of concrete shrinkage on stress level at the interface between the steel and concrete

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PL
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PL
The paper analyzes the influence of sequence of construction of the concrete slab in concrete-steel composite beams on effects of shrinkage of concrete, hence on longitudinal shear force to be transferred across the interface between steel and concrete. Typical as well as staged construction methods have been considered. Different sequences of construction result in different geometrical characteristics of the composite section, including the cross-sections and the moments of inertia, and hence also the longitudinal and bending stiffness. The relationship between the stiffnesses of components of composite beams represents the coefficient d. Based on the analysis it can be concluded that the level of normal and tangential stresses at the interface between the steel and concrete is dependent on the coefficient δ. Consequently, the stresses are also dependent on the sequence of construction of the concrete slab. Moreover, the stresses also depend on the creep of concrete and longitudinal slab reinforcement ratio.
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online
2015-05-07
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bwmeta1.element.ojs-nameId-6e3e8ea9-5a94-37a7-828b-e6cd5da23db6-year-2015-article-2075
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