基于Winkler地基模型的箱涵结构分析研究

Analysis and Study of Box Culvert Structure Based on Winkle Foundation Model

摘要:

针对基床系数现场试验测定困难，箱涵结构计算时，基床系数取值方法各异导致基底弹簧刚度不同，从而引起计算结果相差较大问题，基于Winkler地基模型假定，总结提出3种不同的弹簧刚度计算方法，以实例箱涵结构为依托，采用有限元分析软件对其在不同弹簧刚度取值方法下的内力及地基反力进行分析。结果表明，采用3种不同的弹簧刚度计算方法，箱涵顶板及侧墙控制弯矩差异较小，均可指导设计，底板控制弯矩及基底反力差异较大，建议采用规范查表法计算确定。分析结论可为类似工程设计及计算提供参考。

Abstract:

In view of the difficulty in on-site test determination of the base bed coefficient, when calculating the box culvert structure, the different methods for obtaining the base bed coefficient lead to different stiffness of the base spring, thus causing significant differences in the calculation results. Based on the assumption of the Winkler foundation model, three different spring stiffness calculation methods are summarized and proposed. Relying on the example of box culvert structure, the finite element analysis software is used to analyze its internal forces and foundation reaction forces under different spring stiffness value methods. The results show that three different spring stiffness calculation methods are adopted, and the differences in the control bending moments of the roof and side walls of the box culvert are relatively small, all of which can guide the design. The control bending moment of the base plate and the reaction force of the base vary greatly. It is recommended to use the standard table lookup method for calculation and determination. The analysis conclusion can provide reference for design and calculation of the similar projects.