Paper Title:
Research on Factors of Flutter Critical Velocity in Suspension Bridge Stiffened with Steel Truss
  Abstract

Take the Liujiaxia bridge as engineering background. Based on classical flutter theory, It focus on research critical factors which affect the critical velocity about the ultra-narrow steel truss stiffening girder suspension bridge in order to provide theoretical basis to the problem of low flutter stability of Liujiaxia bridge. The results show that critical velocity will decrease with increase about the vertical bending frequency and will increase with the torsion frequency and torsion-bend-frequency ratio. But the critical velocity will keep stabilize when torsion-bend-frequency ratio exceeds than 1.2. Though Changing sag-span ratio, width and height of beam can improve the critical velocity, it maybe increase cost of bridge remarkably when width and height of beam reach to some level. It is uneconomic if only adopting structural measures by means of optimization of design parameters, as a result, aerodynamic measures is more important.

  Info
Periodical
Advanced Materials Research (Volumes 250-253)
Edited by
Guangfan Li, Yong Huang and Chaohe Chen
Pages
1988-1995
DOI
10.4028/www.scientific.net/AMR.250-253.1988
Citation
J. H. Bi, C. S. Shu, "Research on Factors of Flutter Critical Velocity in Suspension Bridge Stiffened with Steel Truss", Advanced Materials Research, Vols. 250-253, pp. 1988-1995, 2011
Online since
May 2011
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Price
$32.00
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