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以箱形截面钢桥墩作为数值分析对象,分别使用修正双曲面模型、等向强化模型和随动强化模型预测钢桥墩在正负交替荷载作用下的滞回性能;并通过计算与试验结果的对比,探讨了这3种钢材本构模型的各自预测精度和适用范围。结果表明:修正双曲面模型能预测箱形薄壁截面和箱形厚壁截面钢桥墩的滞回性能;等向强化模型和随动强化模型仅适用于预测箱形稍薄截面钢桥墩的滞回性能,对于箱形厚壁截面钢桥墩,其预测结果则不够理想。
Taking the box girder with box section as the object of numerical analysis, the modified hyperbolic model, the isotropic hardening model and the follow-up hardening model were respectively used to predict the hysteretic behavior of the steel piers under alternating positive and negative loads. Comparing with the experimental results The respective prediction accuracy and applicable range of the three steel constitutive models are discussed. The results show that the modified hyperbolic model can predict the hysteretic behavior of steel piers with box-shaped thin-walled sections and box-shaped thick-walled sections. The isotropic strengthening model and the follow-up hardening model are only suitable for the prediction of hysteresis Performance, the box-shaped thick-walled steel pier section, the forecast result is not ideal.