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建立了双幅桥面静力系数气动干扰的定量分析方法,定义干扰因子为双幅桥面的静力系数与单幅桥面的静力系数之比。基于测压风洞试验,针对3种典型断面(矩形断面、Π形断面和流线形断面),对双幅桥面桥梁静力系数气动干扰进行了研究。研究结果表明:静力系数气动干扰主要表现为遮挡作用,下游断面的阻力系数均值小于单幅断面结果。与流线形断面相比,钝体断面(矩形断面和Π形断面)的遮挡作用更明显。
The quantitative analysis method of double-deck static coefficient aerodynamic disturbance is established, and the interference factor is defined as the ratio of the static coefficient of double-decked deck to the static coefficient of single decked deck. Based on the pressure wind tunnel test, the aerostatic interference of static coefficient of double deck bridge deck bridges was studied for three typical sections (rectangular section, Π-shaped section and streamlined section). The results show that aerodynamic interference of static coefficient is mainly obstructed, mean drag coefficient of downstream section is less than that of single cross-section. Compared with the streamlined section, bluff body section (rectangular section and Π-shaped section) shielding effect is more obvious.