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为研究大跨度斜拉桥的铺装问题,文中应用嵌入式模型的方法,将钢箱梁局部模型嵌入全桥模型中进行有限元计算,分析铺装结构在纵桥向和横桥向的应力应变状态,并与目前较为普遍的简化模型法计算结果进行对比。对比结果显示,各控制指标在横桥向应力相差很小,误差基本在5%以内;纵桥向应力差别较大,最大相差达到77.9%。探究缘由,因为在嵌入式模型法分析过程中考虑了正交异性钢桥面板参与主梁受力的作用,以及引入更符合工程实际的边界约束条件,其结果较为合理,可为铺装设计和成桥后的实桥试验提供参考。
In order to study the pavement problem of long-span cable-stayed bridge, embedded model method is used in this paper to embed the local model of steel box girder into the full-bridge model for finite element calculation. The stress of pavement structure in both longitudinal and transverse directions Strain state, and with the more common simplified model method to compare the results. The comparison results show that the stress of each control index is very small, the error is basically within 5%; the difference of longitudinal bridge stress is large, the maximum difference is 77.9%. Explore the reason, because in the analysis of embedded model method to consider the orthotropic steel bridge deck to participate in the role of the main beam, as well as the introduction of more in line with the actual engineering constraints of the boundary conditions, the result is more reasonable, for pavement design and into the bridge After the actual bridge test provide a reference.