Study on traffic sign setting of Hong Kong-Zhuhai-Macao bridge

Ma, Ershun; Qu, Shangwen; Hu, Jinglu; Wang, Ronghua; Yang, Yang

doi:10.1117/12.2619595

Cited by 1 publication

(1 citation statement)

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“…Tang et al [26] found that the existence of central slot can improve the critical flutter wind velocity at lower angles of attack, however, the existence of central slot further decreases the flutter performance at larger angles of attack. It is found that a reasonable type of wind fairings could improve the flutter performance and suppress the vortex-induced vibration of long-span bridges [27,28]. It is necessary to further study whether the measures such as wind fairing and central slot are necessarily effective for the pedestrian suspension bridge girder section.…”

Section: Introductionmentioning

confidence: 99%

Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures

Guan

Liu

Gao³

et al. 2022

Buildings

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In order to study the flutter of long-span pedestrian suspension bridge and its aerodynamic control, a 420m-span pedestrian suspension bridge is used as an engineering example, the wind-induced vibration of seven particular aerodynamic sections is studied by wind tunnel tests, and the soft flutter phenomenon of two kinds of aerodynamic sections is identified. The results show that the wind fairing and the wind-retaining plate measures are not necessarily effective measures to improve the wind-induced stability of long-span pedestrian suspension bridge, as these two measures may reduce the flutter stability: the wind fairing section in the positive angle of attack is prone to torsion-based soft flutter phenomenon, in which the vertical vibration spectrum contains multiple vibration frequencies, so the conventional formulation of the linearized self-excited forces is no longer satisfied; the wind-retaining plate section in the negative angle of attack is prone to soft flutter dominated by vertical vibration, and the beat vibration phenomenon is found in the torsional vibration time history of the wind-retaining section. Slotting in the center of the girder section can significantly change the flow state of the section, which is an effective measure to improve the flutter stability of the pedestrian suspension bridge.

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Section: Introductionmentioning

confidence: 99%