Static And Dynamic Characteristics And Stability Analysis Of Tied Arch Bridge

The Tie arch bridge has the advantages of beautiful type,large bearing capacity and strong crossing ability,and has been widely used in China's traffic construction in recent years.In all kinds of tie arch bridges,the utilization of Tie arch bridge greatly reduces the engineering quantity and cost of the lower part and foundation of Arch bridge in plain area or soft base area.In this paper,the static and dynamic characteristics and stability of tied arch bridge are analyzed.The main research contents are as follows:(1)The finite element analysis model of the whole bridge is established by using Midas/civil finite element analysis software,and the construction stage of the bridge and the operation stage of the bridge are analyzed respectively,and the mechanical characteristics of the bridge are given,The load data are provided for the finite element analysis of the bridge.(2)According to the different working conditions of the bridge,the static performance analysis,stability analysis and dynamic characteristic analysis are carried out to obtain the overall stress characteristics of the bridge structure.Through the collection of geographical location,geological hydrology and other data,through the model and data analysis and comparison,focus on the rationality of the design,advanced technology,engineering economy.(3)Through the analysis of linear elastic stability and dynamic characteristics of bridges,the instability modes,stability safety factors,natural frequencies and mode characteristics of the model under key working conditions are given,and the factors affecting the stability of bridges are discussed,which provides good guidance for practical construction.(4)Studying various construction methods and processes of arch bridge,through the comparison of different construction schemes,the rationality and economy of tied arch bridge construction schemes are highlighted.The stress analysis of arch rib and tie rod of bridge during construction is carried out,and the stress and stiffness are checked locally according to the code.The relevant data meet the requirements of the code.Figure[56]Table[44]reference[58]...