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文章为了研究大跨径柔性系杆拱桥受力特性,采用三维有限元分析技术对其进行了系统的力学分析。首先建立整桥杆系结构模型,分析桥梁整体结构变形对桥面铺装层的作用;接着建立桥梁的局部模型,分析铺装层底在局部轮载作用下的剪应力。计算结果表明:桥梁出现较多负弯区,但桥梁整体变形引起的铺装层拉应变较小,不足以导致铺装层破坏;水平力系数和轮胎压力对粘结层剪应力影响较大,适当提高铺装层厚度可以降低粘结层剪应力;温度变化对粘结层剪切角的影响不大,各种温度下剪切角的变化范围在25～27°之间。
In order to study the mechanical characteristics of long-span flexible tied arch bridge, a three-dimensional finite element analysis technique was used to systematically analyze the mechanical behavior of the flexible tied arch bridge. Firstly, the model of the bridge structure is established to analyze the effect of the overall structural deformation of the bridge on the deck pavement. Then, a local model of the bridge is established to analyze the shear stress of the pavement under the local wheel load. The calculation results show that the bridge has more negative bending zone, but the deformation of the bridge caused by the deformation of the bridge is less than that of the bridge, which is not enough to cause the damage of the pavement. The horizontal force coefficient and the tire pressure greatly affect the shear stress of the bonding layer, Appropriately increasing the thickness of the pavement layer can reduce the shear stress of the adhesive layer; the influence of temperature on the shear angle of the adhesive layer is not significant, and the shear angle varies from 25 ° to 27 ° at various temperatures.