A study on the extreme wind pressure distribution induced by trains in semi-closed stations

To study the extreme wind pressure distribution in semi-closed stations, the wind pressures induced by high-speed trains passing through the railway stations were simulated. The accuracy of the numerical model was also verified against the field-measured data. Based on this validated numerical model, the extreme wind pressure distribution at the train head and tail was analyzed for the two typical station regions (Near platform Region I and far from platform Region II) under the traveling train speed of 250 km/h, 300 km/h, and 350 km/h, respectively. The corresponding empirical equations were established. The results show that there is a nonlinear relationship between extreme wind pressures and train speeds. At the same train speed, the extreme wind pressures in Region I and Region II decrease exponentially with the horizontal distance, whereas the decrease rate is inversely proportional to the vertical distance. When the horizontal distance is less than 15 m, the positive extreme wind pressures due to train head in Region I are always larger than those in Region II at the same vertical distance, while the absolute values of the negative extreme wind pressures due to train head in Region I are always smaller than those in Region II . When the horizontal distance exceeds 15 m, the extreme wind pressures gradually tend to be steady, and the corresponding steady values in Region I are larger than those in Region II . The empirical equations developed in this paper can accurately describe the extreme wind pressure distribution in the semi-closed station. The research results can provide reference for the structural design of semi-closed stations. © 2024 Chinese Vibration Engineering Society. All rights reserved.