【作者】 罗飞；

【导师】 徐贺文； 卢清国；

【作者基本信息】 北京工业大学 ， 桥梁与隧道工程， 2004， 硕士

【摘要】 摘 要 拱桥外形美观，施工简易，造价较低，在修建大跨径桥梁当中是很有竞争力的桥型。采用整体钢箱拱肋或钢箱桁架式拱肋，使拱桥的跨越能力更大。随着我国修建的大跨度钢拱桥的日益增多，需要设计者对该桥型有个定性的认识[36] 。 本文以广州市新光大桥为工程背景，应用通用有限元程序分析了大跨度中承式钢拱桥的静、动力特性。 静力方面，首先分析了在成桥状态几何非线性的影响程度；其次，通过计算各主要受力构件在恒载和活载作用下的内力变化，提出在设计阶段应进行吊杆和桥面系部分构件疲劳强度验算；最后，简要的将平行拱和提篮拱进行了比较。 动力方面，探讨了初应力刚度矩阵在大跨度拱桥动力分析中的影响；通过自振特性分析比较了平行拱与提篮拱的刚度差别；在时程响应分析中，讨论了竖向地震动和行波效应的影响。更多还原

【Abstract】 Arch bridge is characterized by its beautiful appearance , easily constructed andrelative lower cost , and it’s span can be increased when the rib of arch is made ofthe steel box or tuss of steel box, so it can be considered as a most competitive styleamong the long-span bridges. With the increasing contruction of long span archbridge in our country, to study the knowledge of this kind of bridges is becomingmore necessary. Thereby, this paper takes the guangzhou xinguang bridge as engineeringbackground and the behavior of statics and dynamic of steel arch bridge is analysedby the finite element program. As to statics, firstly, the geometry nonlinearity of bridge in service is analysed;Secondly, through analysing the inner force of primary component when they beardead load and live load, puts forward that suspender and the parts of deck must beananlysed for the fatigue strength. lastly，parallel rib of arch bridge is compared withX type rib. For dynamics, the influence of stress stiffness matrix in the dynamics analysisof long span arch bridge is discussed, then the difference of stiffness betweenparallel rib and X type rib is analysed by way of the dynamic property ; finally, theinfluence of upright earthquake and travelling wave are discussed.更多还原