Aerodynamic parameters selection and windbreak mechanism of wind barrier for high-speed railway bridge

Yujing Wang, Weiwei Guo, He Xia, Qinghai Guan and Shaoqin Wang

Abstract

To investigate the optimal aerodynamic parameters of wind barriers for the T-beam of high-speed railway (HSR) bridge and the wind field of the wind barrier-train-bridge system, the three-component forces of the system and the wind pressure on the vehicle surface were tested and analyzed through the sectional model wind test. The effects of wind velocity, with/without wind barrier, the height of wind barrier, and the air permeability of the wind barrier on the aerodynamic characteristics of the train-bridge system are discussed. Additionally, a CFD numerical model is constructed to evaluate the wind environment of the bridge surface with/without the wind barrier, and the impact of wind barrier on the running safety of vehicles are analyzed. Comprehensively considering the running safety of the train and the wind-resistant stability of the bridge, it is more appropriate to set the wind barrier height H as 3.5 m and the porosity β as 30% respectively.

Key Words

aerodynamic characteristics; CFD; crosswind; HSR bridge; wind barrier; wind tunnel test; windbreak mechanism

Address

Yujing Wang:1)School of traffic engineering, Shandong Jianzhu University, JiNan, 250101, China 2)School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China Weiwei Guo:School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China He Xia:School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China Qinghai Guan:School of traffic engineering, Shandong Jianzhu University, JiNan, 250101, China Shaoqin Wang:School of Science, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

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