带肋圆形截面钢桥墩的延性性能预测

发布时间：2018-07-05 19:27

本文选题：桥梁工程 + 钢桥墩　；参考：《哈尔滨工业大学学报》2017年03期

【摘要】：为了解带肋圆形截面钢桥墩在承受轴向压力和水平往复荷载作用下的无量纲化极限承载力和延性性能,通过与既有试验结果对比,确定所采用的有限元建模方法和修正双曲面钢材本构模型的准确性.针对能有效提高圆形截面钢桥墩延性性能的八根肋形式的钢桥墩模型,研究截面正则径厚比、钢桥墩正则长细比、加劲肋正则长细比和轴压比等参数对钢桥墩延性性能和无量纲化极限承载力的影响,并基于参数化分析结果,拟合预测该类钢桥墩的延性性能和无量纲化极限承载力的计算公式.研究结果表明:修正双曲面本构模型能够较准确预测钢桥墩的力学性能,且随着正则径厚比、钢桥墩正则长细比、加劲肋正则长细比和轴压比的减小,桥墩的无量纲化极限承载力和延性性能得到显著提高.
[Abstract]:In order to understand the dimensionless ultimate bearing capacity and ductility of steel pier with ribbed circular section under axial pressure and horizontal reciprocating load, the experimental results are compared. The accuracy of the finite element modeling method and the modified hyperboloid steel constitutive model is determined. In view of the steel pier model which can effectively improve the ductility of steel pier with circular section, the regular diameter to thickness ratio of section and the regular aspect ratio of steel pier are studied. The effects of the regular aspect ratio and axial compression ratio of stiffener on ductility and dimensionless ultimate bearing capacity of steel pier are studied, and based on the results of parametric analysis, Fitting the formula to predict ductility and dimensionless ultimate bearing capacity of this kind of steel pier. The results show that the modified hyperboloid constitutive model can accurately predict the mechanical properties of steel piers, and with the decrease of the regular diameter to thickness ratio, the regular slenderness ratio of steel piers, the regular aspect ratio of stiffeners and the axial compression ratio, the modified hyperboloid constitutive model can accurately predict the mechanical properties of steel piers. The dimensionless ultimate bearing capacity and ductility of piers have been greatly improved.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;
【基金】：上海市科学技术委员会浦江人才计划(08PJ1406400)
【分类号】：U443.22

【相似文献】