Dynamic Characteristics And Response Analysis Of Steel Box Tied Arch Bridge

Arch bridge has a long history in our country.Its appearance is beautiful,its construction is simple and the cost is low.The general span can be selected as a comparison scheme within 500 m.Because of its high bearing capacity and great leaping ability,the tied arch bridge of steel box is widely used in Bridge Engineering in China.With the rapid development of China's economic construction,the distribution range of steel box arch bridge is more and more wide,seismic capacity of steel arch bridge in engineering applications and theoretical research are facing challenges,in order to solve this problem we must analyze and research the dynamic index of steel box tied arch bridge.Taking a steel box tied arch bridge as the background,this paper establishes the spatial model of the main bridge of finite element,and calculates the dynamic parameters of the steel box tied arch bridge theoretically,and analyzes the main research work.(1)Taking the actual steel box tied arch bridge as the research object,the spatial model of the steel box tied arch bridge is established by using the commercial software of the computer,and the distribution law of the dynamic parameters of the structure is calculated.(2)According to the actual parameters of steel box tied to actual engineering construction process of the steel box tied arch bridge model is verified,the actual dynamic characteristics of steel box tied arch bridge state were calculated and designed vibration frequencies and modes of the bridge are analyzed.(3)Select EI-Centro three to generate seismic response spectrum to calculate the response of arch bridge from the horizontal,vertical,vertical and three directions.(4)Using time history analysis method,we input seismic waves from lateral,vertical and vertical directions and three directions respectively,and compare the displacement and internal force responses of various control points under various conditions.