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A platform for research: civil engineering, architecture and urbanism
Inclined apron board for improving flutter performance of large-span flat steel box girder bridge
The invention belongs to the technical field of bridge engineering, and relates to an inclined apron board for improving the flutter performance of a large-span flat steel box girder bridge, which comprises two vibration suppression units which are respectively fixed on the outer sides of tuyeres on the two sides; each vibration suppression unit comprises a plurality of transverse partition plates which are vertically fixed to a lower bottom plate of the air nozzle at intervals in the bridge direction. The horizontal plate is horizontally fixed to the upper edge of the transverse partition plate in the bridge direction and connected with the outer end of the air nozzle. The vertical plate is vertically fixed on the outer edge of the transverse partition plate along the bridge direction and is connected with the outer end of the horizontal plate; and the inclined plate is fixed on the inclined edge of the transverse partition plate in an inward inclined manner along the bridge direction and is connected with the lower end of the vertical plate. The section of the flat steel box girder provided with the inclined apron board respectively generates larger positive value vortexes and negative value vortexes inside the apron board and at the upper part of the tuyere at the downstream of a flow field, and the driving effects of the positive value vortexes and the negative value vortexes on the structure are kept balanced within a certain wind speed range, so that the flutter stability of the section of the flat steel box girder is enhanced.
本发明属于桥梁工程技术领域，涉及一种提高大跨度扁平钢箱梁桥颤振性能的倾斜裙板，包括两个抑振单元，两个抑振单元分别固定在两侧风嘴的外侧；每个抑振单元均包括：多个横隔板，沿顺桥向间隔竖直固定在风嘴的下底板上；水平板，沿顺桥向水平固定在横隔板的上边缘上，并且与风嘴的外端连接；竖直板，沿顺桥向垂直固定在横隔板的外边缘上，并且与水平板的外端连接；倾斜板，沿顺桥向向内倾斜固定在横隔板的斜边上，并且与上述竖直板的下端连接。设置了倾斜裙板的扁平钢箱梁断面在流场下游在裙板内部和风嘴上部分别出现较大正值旋涡和负值旋涡，正值旋涡与负值旋涡对结构的驱动作用在一定风速范围内保持平衡，增强了扁平钢箱梁断面的颤振稳定性。
Inclined apron board for improving flutter performance of large-span flat steel box girder bridge
The invention belongs to the technical field of bridge engineering, and relates to an inclined apron board for improving the flutter performance of a large-span flat steel box girder bridge, which comprises two vibration suppression units which are respectively fixed on the outer sides of tuyeres on the two sides; each vibration suppression unit comprises a plurality of transverse partition plates which are vertically fixed to a lower bottom plate of the air nozzle at intervals in the bridge direction. The horizontal plate is horizontally fixed to the upper edge of the transverse partition plate in the bridge direction and connected with the outer end of the air nozzle. The vertical plate is vertically fixed on the outer edge of the transverse partition plate along the bridge direction and is connected with the outer end of the horizontal plate; and the inclined plate is fixed on the inclined edge of the transverse partition plate in an inward inclined manner along the bridge direction and is connected with the lower end of the vertical plate. The section of the flat steel box girder provided with the inclined apron board respectively generates larger positive value vortexes and negative value vortexes inside the apron board and at the upper part of the tuyere at the downstream of a flow field, and the driving effects of the positive value vortexes and the negative value vortexes on the structure are kept balanced within a certain wind speed range, so that the flutter stability of the section of the flat steel box girder is enhanced.
本发明属于桥梁工程技术领域，涉及一种提高大跨度扁平钢箱梁桥颤振性能的倾斜裙板，包括两个抑振单元，两个抑振单元分别固定在两侧风嘴的外侧；每个抑振单元均包括：多个横隔板，沿顺桥向间隔竖直固定在风嘴的下底板上；水平板，沿顺桥向水平固定在横隔板的上边缘上，并且与风嘴的外端连接；竖直板，沿顺桥向垂直固定在横隔板的外边缘上，并且与水平板的外端连接；倾斜板，沿顺桥向向内倾斜固定在横隔板的斜边上，并且与上述竖直板的下端连接。设置了倾斜裙板的扁平钢箱梁断面在流场下游在裙板内部和风嘴上部分别出现较大正值旋涡和负值旋涡，正值旋涡与负值旋涡对结构的驱动作用在一定风速范围内保持平衡，增强了扁平钢箱梁断面的颤振稳定性。
Inclined apron board for improving flutter performance of large-span flat steel box girder bridge
一种提高大跨度扁平钢箱梁桥颤振性能的倾斜裙板
GAO GUANGZHONG (author) / YAN XIN (author) / SUN YANBO (author) / BAI HUA (author) / LI JIAWU (author) / QIAO YUNQIANG (author) / LU GAN (author) / CHEN JIAYONG (author)
2023-11-10
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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