Numerical and experiment study on anti-glare and noise for road-rail same-deck bridges

This paper proposes a multifunctional barrier that can integrate anti-glare, noise reduction, and wind resistance functions on highway-railway bridges. A cross-river cable-stayed bridge is used as a representative case to evaluate multifunctional barrier performance. Optical simulations shows that the barrier effectively reduces the glare of the train headlights and reduces the maximum threshold increment of the inner and outer lanes to 3.77% and 4.26%, respectively, far below the limit of 10%. COMSOL acoustic simulations and experimental measurements confirmed that the barrier achieves an insertion loss of 7 ~ 8 dB(A), meeting design expectations. Parametric analysis identified optimal configurations with a barrier height of 3.0 m, a shielding angle of 8°, and an opening rate of 40%. The results demonstrate that the proposed barrier effectively balances anti-glare, noise reduction, and wind resistance, providing a technical reference for the integrated design of multifunctional barriers on road-rail same-deck bridges.