An intelligent adjustment grid device and method for suppressing wind vibration of split box girder
An intelligent adjustment and box girder technology, applied in bridges, bridge construction, bridge parts, etc., can solve the problems of poor grid flexibility and achieve the effect of suppressing wind vibration and avoiding vortex induced resonance
Active Publication Date: 2020-10-16
SHENZHEN UNIV
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Problems solved by technology
The purpose is to solve the problem that the grids in the prior art are all fixed and have poor flexibility
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[0033] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] Please also see Figure 1-Figure 11 , the present invention provides some embodiments of an intelligent adjustment grid device for suppressing wind vibration of a split box girder.
[0035] Such as figure 1 As shown, the split box girder in this embodiment refers to a split box girder formed by setting a central slot in the middle of the bridge. That is to say, the split box girder is composed of two parts, respectively recorded as the first polygonal box girder 10a and the second polygonal box girder 10b, and the first polygonal box girder 10a and the second polygonal box girde...
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The invention discloses a split box girder wind vibration inhibiting intelligent adjustable grating structure and a method thereof. The split box girder wind vibration inhibiting intelligent adjustable grating structure comprises four retractable grating modules arranged on a split box girder and a three-dimensional ultrasonic anemometer; every retractable grating module comprises an electric wheel, a first vertical rod, a second vertical rod and a retractable grid which are arranged on the surface of the split box girder, the electric wheel is connected with the three-dimensional ultrasonic anemometer and used for moving horizontally on the split box girder according to the wind speed and direction detected by the three-dimensional ultrasonic anemometer, and the retractable grid can be driven by the electric wheel to extend towards the center of a central slot and cover the central slot to adjust the porosity of the central slot. By means of the retractable grating modules, when windblows the split box girder, vortexes inside the central slot can be scattered to avoid forming large-size vortexes and further avoid vortex-induced vibration of the split box girder, so that the overall wind-resistant performance of a bridge can be enhanced.
Description
technical field [0001] The invention relates to the field of bridge wind vibration, in particular to an intelligent adjustment grid device and method for suppressing wind vibration of a split box girder. Background technique [0002] As the third-generation box girder, the split box girder is a breakthrough innovation in the main girder section of long-span bridges following steel truss girders and closed box girders, which can significantly increase the critical wind speed of flutter and improve aerodynamic stability. Compared with the closed integral box girder, the central slot of the split box girder will cause the flow state of the cross-sectional airflow, especially the vortex generation and its motion law are more complicated, so it is easier to excite the split box girder at a lower wind speed. Vortex-induced resonance with a large amplitude occurs. Although vortex vibration does not have the risk of dynamic instability like flutter, due to its low wind speed and hi...
Claims
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IPC IPC(8): E01D19/00E01D2/04
Inventor 周锐蔡金梅周海俊杜彦良葛耀君
Owner SHENZHEN UNIV