Experimental and numerical study on vibration and structure-borne noise of composite box-girder railway bridges

Abstract

ABSTRACT This paper adopts a proficient approach to evaluate vibration and structure-borne noise and makes up for the steel-concrete composite (SCC) box girder vacancy in the SCC structure. First, the dynamic equation of the train-rail system is established, the pseudo-response of the system in the frequency domain is appropriately assessed by pseudo excitation method (PEM), and the frequency spectra of the wheel-rail force as well as the forces transmitted to the bridge are obtained. Next, applying the force to the finite element method (FEM), boundary element method (BEM), and statistical energy analysis (SEA) model. The vibration and structure-borne noise of the SCC box girder are calculated in the frequency domain. Then, the effectiveness of the method and model is verified through the comparison of the field experimental results. Finally, the effect of the ground reflection in the SEA model is considered using the sound ray-tracing method for the first time.