Analysis of Mean Aerodynamic Force Coefficient based on the Dynamic Characteristics of Large Span Arch Bridge and the Force 

Mingliang ZHANG

College of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, CHINA 

Abstract: Based on the flutter response analysis of long-span arch bridge, the finite element analysis software is used to calculate the dynamic characteristics of the bridge, and the natural frequency and vibration mode of the bridge are obtained. Using the fluid analysis software, the section form of the bridge by numerical simulation, mean aerodynamic force coefficient are obtained. The lateral stiffness of the arch bridge is weak, which verifies the correctness of the CFD numerical simulation method. 

Keywords: Arch bridge; Dynamic characteristics; Mean aerodynamic force coefficient; Numerical simulation