The two-edge box girder has been widely used as a stiffened girder in cable-stayed bridges. However, such girders have weakness in\naerodynamic stability. To improve its aerodynamic stability, some previous researchers have given slope to the edge box instead of\ninstalling additional attachments to aerodynamically stabilize the bridge. For wind load design, an angle of attack (AOA) has to be\nconsidered. However, the effect of AOA has not been studied for sloped box girder yet. In the present study, the effect of AOA on\nthe static wind load coefficient was investigated for 2-edge sloped box girder. A series of wind tunnel tests was performed by\nvarying the box slope angle from 0Degreeto 17Degreewhere AOA was set from - 10Degreeto 10Degree. Results showed that the lateral wind force is\nconsiderably reduced with the increase of the box slope angle except the case with the physical angle of 8Degree-11Degree. For practical AOA\nrange, the box slope should be larger than 15Degreeto minimize the aerodynamic static lateral force on the girder.
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