基于风洞实验的超大跨钢结构双箱梁桥面公路车辆气动载荷分析

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中图分类号：U448.213；TP391.99 文献标志码：B

Abstract： The wind loads of three typical highway vehicles on a twin-box girder bridge are obtained using scaled-down model wind tunnel experiment. Combining the wind profiles of diffrent lanes，the influence of vehicle position and wind attack angle on the aerodynamic force coeffcients of the vehicles are analyzed.The results show that the lateral force coefficient，rolling moment coefficient，and yawing moment coefficient of the vehicles exhibit an approximately linear decreasing trend as the vehicles move away from the windward side of the bridge，while the lift force coeficient and pitch moment coefficient show an overall increasing trend;when the wind attack angle is -3∘ ，the lateral force coefficient，rolling moment coefficient，and pitch moment coefficient of the vehicles on the leeward side are slightly higher than those on the windward side，and are significantly greater than the aerodynamic force coefficients when the wind attack angle is 0∘ ：

Key words： wind tunnel experiment； road vehicle； twin-box girder bridge； aerodynamic coeffcient;lane；wind attack angle

0引言

随着桥梁建设技术的快速发展，大跨度公路桥梁，甚至跨度超过 2 000m 的超大跨度桥梁越来越普遍[1]。（剩余5778字）