Analysis On Dynamics Characteristics And Earthquake Response Of Long-Span Cable Stayed Bridge

Cable-stayed bridge because of its cross capacity,the efficient structure and modern bridge engineering is in the fastest growing,and is the most competitive one of the bridge types.Recent years,the bridge is taking into account in the economic and aesthetic factors,demi-tower,tower cable-stayed bridge with its economic,aesthetic, etc.,there have been a tendency to be heated up,the bridge-outside of such special construction of is more and more,such as Australia,Batman Bridge,the Bridge of Spain Ebro,Spain Lerez River,Erasmus Bridge,Rotterdam,the Netherlands,Hong Kong,Japan Hamana Lake cable-stayed bridge,which bridge the effect of its unique landscape and mechanical advantages to be on the structural and aesthetic.There is a masterpiece of innovation and bridge characteristics.In China,such tower cable-stayed bridges are rarely,such a special research for the bridge bridge-related is also relatively lack,but as a result of such long-span bridges are generally the hub of transportation projects,investment of having a significant impact on the national economy,for such an important bridge design,seismic design and train-bridge resonance wind power,etc are inescapable.It is necessary to study its dynamic properties,the domestic long-span cable-stayed bridge on the dynamic characteristics and seismic response characteristics of the study is relatively lack.Bridge system to study the dynamic characteristics and seismic response characteristics provide a basis for the seismic design and reference is a work of great significance.In this paper,a study of long-span cable-stayed bridge,the establishment of spatial finite element model of cable-stayed bridge,the application of general-purpose finite element analysis of large-span cable-stayed bridge and its dynamic characteristics of the earthquake response,the main research contents are as follows:1.Summing up the development of large-span cable-stayed bridge and characteristics of the collection at home and abroad have built long-span cable-stayed structure parameters;2.To the actual long-span cable-stayed bridge built for the project background,the establishment of the baseline calculation Bridge finite element model; 3.Application of general finite element program for the entire bridge-building space finite element model to calculate the dynamic characteristics,and in combination with other types of bridges with the theoretical calculation,analysis of the dynamic characteristics of the type of bridge;4.The application of seismic theory,through the time-history analysis,carried out under the key parameters of the Twin Towers two-cable-plane seismic response of long-span cable-stayed bridge analysis,results in the calculation based on the results of the bridge analysis,to draw pertinent conclusions to sum up their performance under seismic response,such as after the construction of a bridge for reference.