Experimental Research on Aerodynamic Characteristics of Bridge Deck at Extreme Attack Angles
Long-span flexible bridges are always challenged by fierce wind load, and the wind with extreme-attack-angle may be a potential danger to threaten the bridge security. The three-component coefficients at extreme attack angles of the section model of one flat streamlined box-girder and central slotted box-girder are investigated through the wind tunnel test, and the detailed explanation are made. The results show that lift and pitch coefficients change approximately linearly between stall angles, and the coefficients display significant nonlinearity and a certain pulsation phenomenon when the attack angle exceeds stall angles, and the stall angles should not be less than ±10° for the sake of the safety of bridges.
F. Y. Xu et al., "Experimental Research on Aerodynamic Characteristics of Bridge Deck at Extreme Attack Angles", Advanced Materials Research, Vols. 163-167, pp. 4104-4108, 2011