Study on the aerodynamic load characteristic of noise reduction barrier on high-speed railway

Noise reduction barrier is a new type of noise barrier, as one of the effective ways to improve the barrier structural safety and reliability, its aerodynamic load characteristic is the key to reflect the overall force of barrier. In this paper, the aerodynamic load characteristics of noise reduction barrier are studied experimentally from three aspects: EMU speeds, distances between train and noise barrier, and EMU types. As the results show, for the bridge section, the positive strain amplitude is about twice the negative strain amplitude at different train speeds. The closer the train is to the barrier, the more sensitive the aerodynamic load is to the speed. The effects of EMU types on the aerodynamic load of the noise barrier are less affected by the train speeds. For the subgrade section, with the increasing of EMU speeds, the increase of positive strain amplitude is much smaller than that of negative strain amplitude. The aerodynamic load characteristic of noise reduction barrier at different distances between train and barrier are highly correlated with the barrier heights. The varies of aerodynamic load on noise barrier with EMU speeds have little relationship with the distances between EMU and barrier.