Theoretical Study on Space Coupling Free Vibration Analysis of Self-anchored Suspension Bridge
Liu Chuncheng 1,Guo Liwen 2,Shi Lei 1 (1.Institute of Civil Engineering and Architecture of Dalian University of Technology,Dalian?116023,China; 2.Hongshi Forestry Bureau in Jilin Province,Jilin?132024,China)
Based on the generalized potential energy variational principal 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 three span self anchored suspension bridge by considering the effect of axial compressive and shearing strain energy of stiffening girder. By constraint variation, the differential equations of vertical vibration, lateral vibration, longitudinal vibration and torsional vibration have been derived. It can provide theoretical basis for the analysis of free vibration of self anchored suspension bridge.