基于有限元法波形钢腹板连续刚构桥几何参数研究

Study on Geometric Parameters of Continuous Rigid Frame Bridge with Corrugated Steel Webs Based on Finite Element Method

波形钢腹板连续刚构桥主梁的设计过程中,起着决定性作用的参数为高跨比,该参数不仅决定了主梁的应力、应变分布性能,也影响了主梁结构的使用寿命与稳定性。为研究波形钢腹板连续刚构桥合理高跨比对结构受力性能的影响,以某大跨度波形钢腹板混凝土连续刚构桥为背景,采用有限元法利用杆系模型对主梁在不同高跨比参数下应力和变形的响应进行了分析。同时采用实体模型对不同腹板高度下主梁的屈曲性能进行了对比研究。最后采用综合评价法对各参数进行综合评估,归纳总结出对结构最有利、最合理的参数,为同类桥梁设计提供参考借鉴。

The depth-span ratio,which is a decisive design parameter of the main beam of the continuous rigid frame bridge with the corrugated steel web,not only decides the distribution of the stress and strain of the main beam but also affects the service life and stability of the main beam structure.Based on a large-span concrete continuous rigid frame bridge with the corrugated steel web,this paper analyzed the response to the stress and deformation of the main beam under different depth-span ratios using the linkage model by the finite element method to study the influence of the reasonable depth-span ratio of the bridge on the mechanical properties of the structure.And the solid model was used to carry out the comparative study of the flexural properties of the main beam under different web heights.Finally,using the comprehensive evaluation method to evaluate each parameter,the most favorable and reasonable parameters to the structure were generalized to provide a reference for the design of similar bridges.