Abstract: This paper studies the ultimate load carrying capacity of reinforced concrete arch. The arch is subjected to uniformly nodal vertical loads. The arch fails in elastoplastic lateral deflection associated with the flezuraltorsional deformation of the arch rib. Finite displacement theory and isoparametrc concepts are applied to three-dimensional beam element with rectangular cross-section, A simulation model is set up. The formulas of three nodes beam element are developed and applied to the calculation of the ultimate load carrying capacity of reinforced concrete arch. The experiments prove that the calculation method is reasonable.

摘要： 本文研究钢筋混凝土拱的极限承载能力。拱承受均匀的节点竖向荷载。拱的破坏是由于与拱肋弯扭相关的弹塑性横向位移引起的。有限位移理论和等参元插值概念被应用于矩形截面的三维梁元,并建立了计算模型。进而推导了三结点梁元的公式。用于计算钢筋混凝土肋拱,实验证明计算方法合理可行。