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本文借助大型通用有限元软件ANSYS分析研究了在不同跨高比情况下双连梁的受力性能。文中共设计了五组模型,跨高比分别为2.4、2.7、3.0、3.4、4.0。分析结果表明:随着连梁跨高比的逐渐增大,各模型连梁所承担的总内力均逐渐减小,结构顶点的位移逐渐增大,刚度逐渐减小。同时,在每个模型中,上梁所承担的剪力比下梁小,上梁所承担的轴力(绝对值)比下梁大,上梁与下梁所承担的弯矩基本相同。
In this paper, with the help of large-scale general finite element software ANSYS, the mechanical behavior of double-girder under different span ratios is studied. The paper designed a total of five groups of models, the cross-ratio were 2.4,2.7,3.0,3.4,4.0. The results show that with the increase of span-to-span ratio, the total internal forces of each model girder decrease gradually, and the displacement of the structure apex gradually increases and the stiffness decreases gradually. At the same time, in each model, the shear force borne by the upper girder is smaller than that of the lower girder. The axial force (absolute value) borne by the upper girder is larger than that of the lower girder and the bending moment borne by the upper girder and the lower girder is basically the same.