Abstract In this paper, steel ring restrainers (SRRs) with rectangular section are newly developed as an unseating prevention device for bridges, and results of experiments and corresponding finite element (FE) analyses of the twenty-six SRR specimens are presented. Through the monotonic tests and FE analyses, an extensive parametric study was performed to assess the effect of each parameter on the mechanical behavior of the SRRs. Not only the configuration parameters such as the sectional area and aspect ratio of the cross-section, the radius of the curved part, the length of the straight part and the diameter of the guide pulley, but also the friction coefficient between the steel ring and guide pulley and the material type of the steel ring are considered as parameters. Moreover, prediction formulas were proposed based on the parametric study. The experimental and analytical results show that while keeping the original advantages of the circular-section SRRs proposed in a previous study, the strategy of altering the cross-section shape of the steel ring from circle to rectangle is effective to compensate for its deficiencies. Derived formulas give predictions close to force-displacement curves of the SRR specimens and numerical models. Accordingly, the formulas can be expected to predict the force-displacement curves of the SRRs.

中文翻译：

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矩形截面钢环限位器的试验与数值研究

摘要 在本文中，新开发了矩形截面钢制环形限位器（SRRs）作为桥梁防脱位装置，并给出了 26 个 SRR 试件的实验结果和相应的有限元（FE）分析结果。通过单调测试和有限元分析，进行了广泛的参数研究，以评估每个参数对 SRR 机械性能的影响。不仅有横截面的截面积和纵横比、弯曲部分的半径、直线部分的长度和导轮直径等配置参数，还包括钢圈与导轮之间的摩擦系数。导轮和钢圈的材料类型被视为参数。此外，在参数研究的基础上提出了预测公式。实验和分析结果表明，在保持先前研究中提出的圆形截面 SRR 的原始优势的同时，将钢环的横截面形状从圆形改为矩形的策略有效地弥补了其不足。推导出的公式给出了接近 SRR 试样和数值模型的力-位移曲线的预测。因此，可以预期这些公式可以预测 SRR 的力 - 位移曲线。推导出的公式给出了接近 SRR 试样和数值模型的力-位移曲线的预测。因此，可以预期这些公式可以预测 SRR 的力 - 位移曲线。推导出的公式给出了接近 SRR 试样和数值模型的力-位移曲线的预测。因此，可以预期这些公式可以预测 SRR 的力 - 位移曲线。