基于風(fēng)洞實(shí)驗(yàn)的超大跨鋼結(jié)構(gòu)雙箱梁橋面公路車輛氣動(dòng)載荷分析

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中圖分類號(hào)：U448.213；TP391.99 文獻(xiàn)標(biāo)志碼：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

隨著橋梁建設(shè)技術(shù)的快速發(fā)展，大跨度公路橋梁，甚至跨度超過 2 000m 的超大跨度橋梁越來越普遍[1]。（剩余5778字）