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A steel-concrete composite beam element with material nonlinearities and partial shear interaction

机译：具有材料非线性和局部剪力相互作用的钢-混凝土组合梁单元

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摘要

This paper presents the formulation of a novel force-based 1D steel-concrete composite element that captures material nonlinearities and partial shear interaction between the steel profile and the reinforced concrete slab. By decomposing the material total strain into its elastic and inelastic components, a total secant solution strategy based on a direct iterative scheme is introduced and the corresponding solution strategy is outlined. A composite Simpson integration scheme, together with piecewise interpolation of the slip strain along the element axis, is employed to calculate the slip forces along the element axis consistently. The accuracy and efficiency of the formulation are verified by some numerical examples reported elsewhere in the literature, and it is shown that the formulation with just one element can lead to virtually closed form analytical results as long as the integrals in the formulation are calculated accurately.
机译：本文提出了一种新颖的基于力的一维钢-混凝土复合元件的配方，该元件捕获了材料非线性和钢型材与钢筋混凝土板之间的局部剪切相互作用。通过将材料总应变分解为弹性和非弹性分量，引入了基于直接迭代方案的总割线求解策略，并概述了相应的求解策略。采用复合Simpson积分方案，以及沿单元轴的滑动应变的分段插值，可以一致地计算沿单元轴的滑动力。通过文献中其他地方报道的一些数字示例验证了制剂的准确性和效率，并且表明，只要精确计算出制剂中的积分，仅使用一种元素的制剂就可以得出几乎封闭的分析结果。

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