台阶式拱座基础的计算分析与探讨

Calculation Analysis and Discussion of Stepped Arch Abutment Foundation

摘要:

对于台阶式拱座基础的地基应力计算，根据计算假定和精度要求的不同，主要有传统法、变形协调法和有限元数值分析法3种计算方法。基于某上承式钢筋混凝土拱桥的工程实例，对其中的变形协调法进行了适当的变换思考以适用于本工程，通过有限元数值分析法研究了地基应力沿基础背面和底面的分布情况，同时对3种计算方法的结果进行了比较分析，研究了地基刚度对地基应力的影响以及地基应力沿横桥向的分布规律。研究结论和建议可为类似工程的设计提供参考。

Abstract:

According to the different calculation assumptions and accuracy requirements, there are three calculation methods mainly of traditional method, deformation coordination method and finite element numerical analysis method for the calculation of foundation stress of stepped arch abutment. Based on an engineering example of a deck-type reinforced concrete arch bridge, the deformation coordination method is appropriately transformed to be suitable for this project. The distribution of foundation stress along the back and bottom of the foundation is studied through the finite element numerical analysis method. The results of the three calculation methods are compared and analyzed. The influence of foundation stiffness on foundation stress and the distribution law of foundation stress along the transverse direction of bridge are studied. The research conclusions and suggestions can provide references for the design of the similar projects.