Revealing energy transfer between deck and cables in cable-stayed bridges through resonancne analysis with coupling effect of adjacent cables considered

Abstract The nonlinear dynamic model of a shallow arch with multiple cables is developed to model a long-span cable-stayed bridge. Based on the veering phenomenon of cable-stayed bridges, the in-plane modal internal resonance between the first mode of the shallow arch and the first mode of the cable is investigated under both primary resonance and subharmonic resonance. Modulation equations of the dynamic system are obtained by Galerkin discretization and the multiple scales method, in which the equilibrium solution of modulation equations is obtained by the Newton-Raphson method. Meanwhile, the Runge-Kutta method is applied to directly solve the ordinary differential equations to verify the accuracy of the perturbation analysis. Numerical analysis shows that the coupling effects (nonlinearities) caused by increasing the number of cables can have a significant influence on dynamic properties of the system, especially for the hardening spring behavior of cables.