EXPERIMENTAL STUDY WITH FULL AEROELASTIC BRIDGE MODEL ON AERODYNAMIC STABILITY OF A LOW-TOWER CABLE-STAYED BRIDGE

DOI

Bibliographic Information

Other Title
  • 全橋模型試験による低主塔斜張橋の耐風挙動に関する検討

Abstract

Dynamic characteristics and wind-resistance performance of a cable-stayed bridge with low-height towers (main span length: 575m, tower height: 95.5m) were studied by full aeroelastic bridge model test and gust response analyses. Natural frequency of 1st bending mode of the low-tower bridge was about 30% smaller than that of standard bridges. In the gust response analyses, calculated bending amplitude of the low-tower bridge was calculated about 3 times larger than that of the standard bridges. In the wind tunnel tests, vortex induced oscillations of 1st and 2nd bending modes were observed in smooth flows, and while they did not appear in boundary layer flow. Unstable oscillations such as flutter were not observed in wind tunnel test within reference wind velocity for flutter. In the boundary layer flow, observed gust responses were observed, and they were thought to be larger than results of gust response analyses. Differences between wind tunnel tests and gust response analyses were mainly due to differences of turbulence intensity and spectrum intensity of fluctuating wind at the natural frequencies.

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Details 詳細情報について

  • CRID
    1390282680570425088
  • NII Article ID
    130004644494
  • DOI
    10.14887/kazekosymp.22.0.275.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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