A parametric study of wave barriers for reduction of train-induced vibrations

In this paper, a Þnite/inÞnite element scheme developed previously by the authors1 is employed to investigate the e¤ectiveness of three di¤erent wave barriers, i.e., the open trench, in-Þlled trench, and elastic foundation, in reducing the ground vibrations caused by the passage of trains. The mathematical model adopted herein is the two-dimensional proÞle that contains the cross-section of the railway, barrier and underlying soils, with the moving train loads simulated as a vertical harmonic line load. Concerning the e¤ect of isolation, the geometric and material parameters of the three barriers investigated include the distance to rail, depth, width and thickness, damping ratio, shear modulus, mass density, PoissonÕs ratio, elastic modulus, etc. Also examined is the e¤ectiveness of the three barriers with respect to di¤erent exciting frequencies. Conclusions are made regarding the selection of optimal parameter values for the three barriers in isolating the train-induced ground vibrations