Using single elliptical (SE) cage reinforcement in reinforced concrete pipes (RCP) can reduce both the needed reinforcing steel and labor for manufacturing double and triple steel reinforcing cages. However, there is currently no robust tools to predict the structural behavior of RCP with SE reinforcement. In this study, non-linear 3D finite element model was developed to evaluate the load capacity of SE reinforced RCP. Model predictions were validated using experimental results on corresponding full-scale pipes. The model simulated load–deflection curves of RCP under the three-edge bearing test (TEBT) and predicted its load capacity with an average error of 9%. A parametric study was conducted to investigate the effects of SE cage rotation on the load capacity of RCP. It was found that rotation had minimal effect on the elastic behavior and stiffness of the pipe up to 1 mm vertical deflection. However, SE cage rotation had greater significance on the plastic response of the pipe when the steel reinforcement became fully engaged. The proposed model could provide a basis for developing design charts for RCP with SE reinforcement and quantify possible effects of SE reinforcing cage rotation on pipe load capacity.

在钢筋混凝土管（RCP）中使用单椭圆（SE）笼式钢筋既可以减少所需的钢筋，又可以减少制造双层和三层钢筋笼的劳动。但是，目前尚没有强大的工具来预测带有SE增强的RCP的结构行为。在这项研究中，开发了非线性3D有限元模型来评估SE增强RCP的承载能力。使用相应的满量程管道上的实验结果验证了模型预测。该模型模拟了RCP在三边缘轴承试验（TEBT）下的载荷-挠度曲线，并预测了其载荷能力，平均误差为9％。进行了参数研究，以研究SE保持架旋转对RCP的承载能力的影响。已发现，旋转对管道的弹性行为和刚度（垂直偏移至1 mm）影响最小。但是，当钢筋完全接合时，SE笼旋转对管道的塑性响应具有更大的意义。所提出的模型可以为采用SE加固的RCP设计图提供依据，并量化SE加固笼旋转对管道承载能力的可能影响。