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提出了一种考虑梁板相对滑移和板剪滞效应的结合梁板单元.以矩形板中面4个结点的结点位移、板梁结合面3个点的相对滑移和板中线上3个点的剪滞翘曲位移作为单元的基本自由度,构造了板和梁的位移模式.其中以板的位移模式为主,梁的位移模式则根据板和梁之间的变形协调条件来确定.通过一个钢-混凝土结合梁试验模型的计算,结果表明,根据提出的结合梁板单元得到的结果与试验值和常规有限元的结果较为吻合,说明了此方法的可靠性.
A new kind of combined beam element considering the relative slippage and shearing effect of slab is proposed.The displacement of the four nodes in the middle of the rectangular plate, The three-point shear-lag warpage displacement is taken as the basic degree of freedom of the unit, and the displacement modes of the plates and beams are constructed. The displacement modes of the plates are dominated. The displacement modes of the beams are based on the deformation coordination between slab and beam The calculation results of a steel-concrete composite beam show that the proposed method is in good agreement with the experimental results and the conventional finite element method, which shows the reliability of the proposed method.