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Wind and Structures
  Volume 31, Number 1, July 2020, pages 75-84
DOI: http://dx.doi.org/10.12989/was.2020.31.1.075
 


Nonlinear aerostatic analysis of long-span suspension bridge by Element free Galerkin method
Golriz Zamiria and Saeid R. Sabbagh-Yazdi

 
Abstract
    The aerostatic stability analysis of a long-span suspension bridge by the Element-free Galerkin (EFG) method is presented in this paper. Nonlinear effects due to wind structure interactions should be taken into account in determining the aerostatic behavior of long-span suspension bridges. The EFG method is applied to investigate torsional divergence of suspension bridges, based on both the three components of wind loads and nonlinearities of structural geometric. Since EFG methods, which are based on moving least-square (MLS) interpolation, require only nodal data, the description of the geometry of bridge structure and boundaries consist of defining a set of nodes. A numerical example involving the three-dimensional EFG model of a suspension bridge with a span length of 888m is presented to illustrate the performance and potential of this method. The results indicate that presented method can effectively be applied for modeling suspension bridge structure and the computed results obtained using present modeling strategy for nonlinear suspension bridge structure under wind flow are encouragingly acceptable.
 
Key Words
    suspension bridge; Element-free Galerkin methods; aerostatic stability; wind loads; wind structure interaction
 
Address
Golriz Zamiria and Saeid R. Sabbagh-Yazdi:Department of Civil Engineering, KNToosi University of Technology, 1346, Valiasr St. (Mirdamad Cross), Tehran, Iran
 

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