Application and Optimization of Reinforced Concrete Noise Barrier

Urbanization and increased traffic across Europe are leading to increased exposure of the population to harmful levels of noise, primarily caused by road traffic. Over 30% of the population is exposed to levels exceeding the limits recommended by the World Health Organization (WHO). Among the various noise reduction strategies, reinforced concrete noise barriers stand out as one of the most effective passive measures. This research analyses the geometric optimization of reinforced concrete noise barriers with different top-edge designs (flat, T-shape, symmetric and asymmetric V-shape) using the Bound Optimization by Quadratic Approximation (BOBYQA) method. The analysis was conducted using COMSOL Multiphysics software, where a coupled solid mechanics and pressure acoustics model was developed. The simulations were performed in a frequency range from 50 to 3150 Hz. The results show that geometry has a significant impact on acoustic efficiency, with the asymmetric V-shape demonstrating the greatest noise reduction. These findings highlight the key role of geometric optimization in the design of cost-effective and sustainable noise protection solutions.