【作者】 何赓馀；

【导师】 李小珍；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2006， 硕士

【摘要】 论文采用大型有限元软件，以一座高速铁路系杆拱桥为研究对象，对结构体系设计参数进行了详细分析，主要工作如下：(1)采用有限元软件，详细研究了矢跨比、拱梁刚度比、吊杆布置形式等设计参数对结构受力特性的影响；同时，探讨了拱肋内倾角度、吊杆布置形式等参数对结构自振频率的影响，给出了动力性能相对较优的结构方案。(2)采用能量原理推导了考虑刚性吊杆抗弯刚度的系杆拱桥侧倾稳定的近似计算公式，并用有限元程序进行了验证；详细研究了横撑布置形式、吊杆布置形式、拱肋内倾角度、刚性吊杆截面特性等设计参数对结构横向稳定性的影响，对上述参数的相对较优取值提出了建议。论文研究成果对高速铁路系杆拱桥的设计具有重要参考价值。更多还原

【Abstract】 In this thesis, the finite element program is used to investigate the structural design parameters of a steel tied-arch bridge engineering in high-speed railway. The main work is as follows.First, the influence of ratio of rise to span, ratio of beam-arch stiffness, suspender type on the structural static characteristics is studied in detail. Simultaneously, the influence of leaning angle inside of arch rib and suspende type on the natural frequency is investigated. The structural scheme which has the better dynamic characteristic is pointed out.Second, the formula of lateral stability of tied-arch bridge considering the flexural rigidity of rigid hangers is deduced using the principle of the minimum potential energy. The FEM is used to validate the formula’s accuracy. The influence of horizontal joint type, hanger type, leaning angle of arch rib, section characteristic of rigid hanger on the lateral stability of the bridge is also researched. Some suggestions on those parameters are provide.The research results in this thesis are useful for the design of tied-arch bridges in high-speed railway.更多还原