Conceptual Design of Bridges by
Language: eng
Format: azw3
Publisher: M/s. S.K. Kataria & Sons
Published: 2015-06-10T16:00:00+00:00
5.1.4 Additional Control Measures
According to the code for wind resistant design of highway bridge (JTG/T D60-01-2004), and wind-resistant design of bridge structure requirements of structural wind resistance by aerodynamic measures, structural measures and measures to improve it. Aerodynamic measures mentioned here mainly refers to change components of cross section shape or attach can alter air flow pattern around the appendages, such as stable plates, deflectors, skirt, wind nozzles, slots, because this method of structural change is small, lower economic costs, commonly known as the first choice for additional control measures; knot frame measures mainly refers to the increased rigidity of the structure or the quality and structure of external or internal constraints such as approach, which generally require pay a larger price, in conjunction with structural changes when considering the overall programme; mechanical measures refers to adding damping includes passive dampers and active damper and semi-active dampers, such as main beam of vortex-induced vibration and wind-induced vibration control of bridge tower passive dampers, lasuofeng TMD vibration control of semi-active damper, internal or external cable rain-wind-induced vibration control of magnetorheological fluid dynamic dampers. Will focus on the following main beam flutter control of main girder of aerodynamic measures, or arch ribs of aerodynamic measures and vortex-induced vibration control of cables vibration control of aerodynamic measures.
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