典型人字形桥梁结构分析的刚度法研究

Stiffness Method Study of Structural Analysis of Typical Inverted Y-Shape Bridge

在普通梁理论的基础上,通过增加自由度的分析方法,提出以每个节点10个自由度的薄壁箱梁分析单元。以典型的人字形薄壁箱梁桥作为研究对象,分别建立普通空间梁格、空间板壳有限元分析模型及有机玻璃试验模型,对模型的不同理论分析与实测结果进行比较。研究结果验证了本文理论分析方法的正确性和简便性。

The finite element with 10 degrees of freedom each node for analysis of thin-wall box girder is proposed according to the analysis method of increasing degrees of freedom on the basis of the general elementary beam theory. By taking a typical inverted Y-shape thin-wall box girder bridge as the research object, the general spatial beam grillage model, spatial plate and shell finite element analysis model and organic glass test model are respectively set up, and various analysis and measurements of the models are compared according to the different theories.The results of study verify that the theoretic analysis method proposed in the paper is correct and simple.