Abstract— In this paper a numerical model is developed to predict the behaviour of steel-concrete composite beams with circular openings up to failure. The numerical model takes into account both material and geometric non-linearity and nonlinear behavior of the connection. Calibration with experimental data obtained from previous work shows that the model is able to predict, with relatively good accuracy, the ultimate load. A parametric study is then followed to study the influence of post dimensions and the shape and spacing of the openings on the behavior of such beams under the action of three types of static loading
Keywords— Composite beam, concrete, steel, nonlinear behaviour, shape opening, spacing openings.
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