论文部分内容阅读
分析了斜拉拱组合桥的结构受力特征以及与普通拱桥的差别。以我国正在建设的主跨为400 m的斜拉拱组合桥梁——湘江四大桥为例,利用大型有限元分析软件AN SY S,建立了斜拉拱组合桥的三维空间有限元模型,对桥梁振动频率及振型进行了分析,通过与普通拱桥的分析和对比,重点研究了斜拉索对钢管拱组合桥的静、动力特征的影响,对比分析了两种拱桥型式,相同位置影响线的差异。最后总结了斜拉拱组合桥的静、动力特征,得到了一些有益的结论,为这一新颖桥型的方案选取和设计提供参考。
The structural stress characteristics of the cable-stayed bridge and its difference from the ordinary arch bridge are analyzed. Taking the 400 m diagonal arch composite bridge-Xiangjiang No.4 Bridge under construction in our country as an example, a three-dimensional finite element model of cable-stayed bridge is established by using large-scale finite element analysis software AN SYS. Vibration frequency and vibration mode of the arch bridge were analyzed. Through the analysis and comparison with the ordinary arch bridge, the influence of the stay cable on the static and dynamic characteristics of the composite arch bridge with steel tube and arch was studied. The two types of arch bridge and the influence line of the same position difference. Finally, the static and dynamic characteristics of the cable-stayed bridge are summarized, and some useful conclusions are obtained, which can provide reference for the scheme selection and design of the new bridge type.