三跨连续四肋拱桥横向分布研究

Computation of a Three-Spanned Continuous Rib Arch Bridge in Consideration of Horizontal Distribution of Load

以某公园三跨连续四肋拱桥为例,运用midas有限元分析软件建立空间梁格模型,探索多跨多肋拱桥各拱肋荷载横向分布规律,并采用midas Civil空间梁格模型施加单位力法得到该桥各拱肋的荷载横向分布系数.研究结果表明:在偏载情况下,偏载一侧的两根肋承担了大部分荷载;在正载情况下,四个拱肋的受力呈现对称性,荷载主要由中间的两根拱肋承担.

Taking a three-spanned continuous rib arch bridge in a park as an example, the article built up a finite element model for this bridge with finite element analysis software and explored its lateral distribution. The lateral distribution factors of this bridge was obtained by exerting unit force on the finite element model, which will provide reference for the future design of this type bridge.