Vibration research of cable-stayed bridge with tower-girder consolidation
Chen Ping1, Li Xiaoqing1, Luo Shidong2
COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12D) 341-345
1School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei, China, 430074
2 China Railway Siyuan Survey and Design Group Co., LTD, Wuhan, Hubei, China, 430063
Cable-stayed bridge is a combinative system of bridge towers, beams, piers and cables. Researches on the vibration of the structure generally use finite element method. And the vibration analysis of structure with the specific geometry is easy to get, while the research on the self-vibration considering the change of the bridge geometric parameters is difficult. Based on the Hamilton principle, this paper studied self-vibration frequency of a cable-stayed bridge whose tower and girder were consolidated. The motion equation of a cable-stayed bridge under the symmetric vibration was gained. Considering the changes of the geometric parameters, comparative analysis of the influences on natural vibration frequency were carried out. Results showed that the natural vibration frequency turned approximately linearly when the stiffness and the cable force changed. And the influence with beam changes on the natural vibration frequency was likely a parabola.