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《Journal of Dalian University of Technology》 2007-02
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Theoretical study of vertical free vibration of collaborated system cable-stayed bridge

YU Bao-chu1,2,ZHANG Zhe1,LIU Chun-cheng1,ZHU Wei-zhi1 (1.Inst.of Bridge Eng.,Dalian Univ.of Technol.,Dalian 116024,China;2.School of Civil Eng.,Dalian Fisheries Univ.,Dalian 116023,China)  
Based on the generalized potential variational principle of nonlinear elasticity theory with large deflection,the incomplete generalized potential energy functional with large deflection is established on the space coupling free vibration of collaborated system structure by considering the effect of axial compressive and shearing strain energy of stiffening girder.By constraint variation,the differential equations of vertical vibration of the stiffening girder of collaborated system cable-stayed bridge were derived.The Golden Horse Bridge with T-shape rigid structure and single-tower cable-stayed bridge is taken as an example for the solution of vertical vibration differential equation through the presented boundary condition.By comparing with finite element numerical results the correctness of the method is testified,and the method can provide more attention to the analysis of free vibration of this kind of structure.
【CateGory Index】: U441.3
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