基于偏载作用下的Y形墩受力分析方法与优化设计研究

以浙江嘉兴某快速路项目为依托,通过建立下部结构Y形墩杆系模型和有限元实体模型进行偏载作用下的受力分析对比,并结合拉压杆理论揭示杆系模型在分析Y形墩时难以反映结构真实的受力情况,实体模型分析的结果更为合理。在此基础上进一步提出针对Y形墩受力的最优设计准则,并据此进行优化设计,为以后同类型桥梁下部结构的设计、研究提供参考。

Research on Stress Analysis Method and Optimization Design of Y-shaped Pier under Eccentric Load

Relying on an expressway project in Jiaxing of Zhejiang, through the establishment of the rod system model of Y-shaped pier of the substructure and the finite element solid model, the stress analysis and comparison under the action of eccentric load are carried out. Combined with the strut-and-tie theory, it is revealed that the rod system model is difficult to reflect the real stress situation of the structure when analyzing the Y-shaped pier. The results of the solid model analysis are more reasonable. On this basis, the optimal design criteria for the stress of Y-shaped pier are further proposed, and the optimal design is carried out accordingly, which provides a reference for the design and research of the substructure of the similar bridges in the future.