Abstract：The influence of aerodynamic interaction between the upper deck and the lower deck of separate-type highway-railway double-deck bridges on the aerodynamic effects of vehicles under cross wind is explored. For the separate railway bridge and highway-railway double-deck bridges with the standard height interval, the aerodynamic coefficients of vehicles and the variation of wind profile above the orbit of railway bridge decks, with and without wind screens, are measured by large scale section model wind tunnel tests. Various height intervals have been taken into account to further explore the influence of the height interval on the aerodynamic effects of vehicles. The result shows that the aerodynamic interaction between highway-railway double decks will influence the aerodynamic effects of vehicles, and the wind profile above railway bridge deck and aerodynamic coefficients of vehicles will change with the height intervals. According to the comparison analysis, the height interval is only needed to satisfy the basic structure gauge for railway bridges without wind screen. When the height interval is more than 15m, the change of wind profile above the orbit of railway bridge deck and the aerodynamic forces of vehicles located on the upwind side gets flat when wind screens are used.
苏洋, 李永乐, 陈宁, 鲍玉龙, 李龙安. 分离式公铁双层桥面桥梁-列车-风屏障系统气动效应风洞试验研究[J]. 土木工程学报, 2015, 48(12): 101-108.
Su Yang, Li Yongle, Chen Ning, Bao Yulong, Li Long′an. Study on aerodynamic effects of the separate-type highway-railway double-deck bridge-vehicle-wind screen system by wind tunnel tests. 土木工程学报, 2015, 48(12): 101-108.
