钢管混凝土系杆拱桥静力参数敏感性分析

Static parameter sensitivity analysis of concrete-filled steel tubular tied arch bridge

为了研究设计参数对某钢管混凝土系杆拱桥结构响应的影响,对常用3种参数敏感性分析方法进行对比。并在ANSYS有限元模型中选用响应面法(RSM)对钢管混凝土系杆拱桥进行静力参数敏感性分析,求得各设计参数对拱顶位移、拱座水平推力及拱圈内力等结构响应的敏感因子与敏感百分比。研究结果表明:敏感因子能够体现结构响应随着设计参数变化的程度及规律,而根据敏感百分比的大小能更直观地判断出各设计参数对结构响应的重要程度。为钢管混凝土系杆拱桥的参数敏感性分析与参数识别提供参考。

To study the influence degree of design various parameters on the structural response of concrete-filled steel tubular tied arch bridge, three common parameter sensitivity analysis methods was compared. In a finite element model established by ANSYS, response surface method (RSM) was used to carry out parameter sensitivity analysis on this bridge, and obtained sensitive factor and sensitive percentage of various design parameters on some structure responses, such as deflection in the top of main arch, horizontal force of arch abutment, moment and axial force in the top of main arch. The results show: sensitive factor of design parameters can reflect the degree and regularities of the structural response changing with design parameters,while according to the size of the sensitive percentage could quantitatively distinguish the importance of various design parameters on the structural response. The method can offer some reference to the parameter sensitivity analysis and parameter identification of concrete-filled steel tubular tied arch bridge.