Nonlinear modelling of aerodynamic self-excited forces: An experimental study

The bridge aerodynamics research community is currently discussing several nonlinear wind load models for decks, but no definite conclusion on which model superior to the others available. In this paper, we use experimental data a double-deck section tested in an advanced forced vibration rig study observed nonlinearities and gain insight into what characteristics should be capable of modelling. Single harmonic horizontal, vertical pitching motion; combined stochastic motion are considered. This approach allows investigation more extensive range behaviours than regular tunnel testing. typical mean drift, deviation from superposition distortion. Further, introduce simple response-surface force prediction using polynomial combinations inputs its derivatives. helps further nonlinearity problem at hand select refined modelling can used future work.