Abstract This paper presents a comprehensive numerical and theoretical investigation into the flexural capacities of composite joints with reinforced concrete (RC) slab. The improved 3D (three-dimensional) numerical models were established by MSC. Marc (2012) and calibrated by the experimental observations presented in the companion paper (Mou et al., 2019a [1]). Supplementary parametric studies were then undertaken to examine the effect of concrete slab, size effect (H), axial-force ratio (n), slab thickness (hs), concrete compressive strength (fc’), and the width-to-thickness ratio of column (D/t) on the flexural capacities of the composite joints. Employing the yield line mechanism theory, a calculation method incorporating the effect of the RC slab for the composite joint was proposed. The proposed formulae were featured with a favorable accuracy and suggested to be applied for the design of composite joints in the steel structural systems.

中文翻译：

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钢筋混凝土板对组合梁柱节点抗弯性能的影响：参数研究及评价公式

摘要 本文对钢筋混凝土 (RC) 板复合节点的抗弯能力进行了全面的数值和理论研究。MSC 建立了改进的 3D（三维）数值模型。Marc (2012) 并通过配套论文中的实验观察进行校准（Mou 等人，2019a [1]）。然后进行补充参数研究以检查混凝土板的影响、尺寸效应 (H)、轴力比 (n)、板厚 (hs)、混凝土抗压强度 (fc') 和宽厚比柱 (D/t) 对复合材料接头的抗弯承载力的影响。应用屈服线机理理论，提出了一种结合钢筋混凝土板对复合节点影响的计算方法。