Aerodynamic force characteristics and flow field mechanism
of wide-width double-box composite girders
Jingran Sun,Xiaobing Liu,Dewang Zhang,Luqian Ma,Qun Yang
Abstract
This study investigates the aerodynamic force characteristics and flow field mechanisms of wide-width
double-box composite girders through integrated wind tunnel testing and numerical simulation. Initially,
aerodynamic analysis was conducted across eleven wind attack angles (-10° to +10° at 2° intervals) while
maintaining the prototype bridge aspect ratio of 12.8. Subsequently, parametric analysis was performed for horizontal
flow conditions (0°), examining six aspect ratios (9, 11, 12.8, 15, 17, and 19). The results demonstrate that, under the
aspect ratio of 12.8, as the wind attack angle varies from -10° to 10°, the drag coefficient and the absolute value of the
lift coefficient initially decreases and then increases, the direction of moment changes from counterclockwise to
clockwise. At 0° wind attack angle, as the aspect ratio increases, the drag coefficient remains constant initially and
then increases, the absolute value of the lift coefficient initially decreasing and then increasing, and the moment
coefficient gradually decreases. The lift and moment coefficients are smaller during the construction and service
stages. Calculation formulas for aerodynamic force coefficient with different aspect ratios under 0° wind attack angle
are presented, which can provide a reference for the wind load design of wide-width double-box composite girders in
practical engineering.
Key Words
aerodynamic force characteristics; flow field mechanism; numerical simulation; wide-width
double-box composite girders; wind tunnel testing
Address
Jingran Sun — Jingran Sun, Xiaobing Liu, Dewang Zhang, Luqian Ma, Qun Yang
Xiaobing Liu — 1)School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 2)Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China
Dewang Zhang — School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Luqian Ma — School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Qun Yang — 1)School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 2)Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China
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