The Study Of Statics Nolinear And Earthquake Response For The Long-Span Steel Arch Bridge

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.