Investigation Into Three-Component Force Coefficients Of Bridge Deck Section

Along with the development of long span bridge, the wind sensitivity of the bridge structure is increased. The bridge wind resistance studies tend to be elaborate, and, more and more scholars begin to pay close attention to various pneumatic measures of structural vibration. Yet, it may affect the static structure stability to meet the various structural dynamic performances of vibration measures. Therefore it is necessary to study the influence of various aerodynamic measures to vibration three-component force coefficients.Based on wind tunnel test method, this paper mainly completed the following aspects:1.There are many factors that affect the three-component force coefficients. This paper focus on two kind of typical bridge deck sections, which is named truss girder section and streamlined section. Analysis study is conducted about the impact of aerodynamic measures and ancillary facilities on the beam three-component force coefficients, in order to seek the law of how to improve the force characteristics of the structure.2.The analysis factors of the three-component force coefficients include the guide vane in different positions, the central-slotting with different opening rate, the central stability plate at different positions, the guard bar with different drafty rates, the orbit of maintenance car at different positions, with or without the wind barrier, with or without vehicles. The wind tunnel test method was used to study the influence of these parameters to the two kinds of sections, respectively.3.Analysis was conducted about the influence of these parameters to the static wind load of the girder. The results show that the changes of the three-component force coefficients directly affect the static wind loads, and the influence of changes of these parameters to the Static wind load can not be ignored.