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Numerical investigation on the wind stability of super long-span partially earth-anchored cable-stayed bridges
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  • Journal title : Wind and Structures
  • Volume 21, Issue 4,  2015, pp.407-424
  • Publisher : Techno-Press
  • DOI : 10.12989/was.2015.21.4.407
 Title & Authors
Numerical investigation on the wind stability of super long-span partially earth-anchored cable-stayed bridges
Zhang, Xin-jun; Yao, Mei;
 Abstract
To explore the favorable structural system of cable-stayed bridges with ultra-kilometer main span, based on a fully self-anchored cable-stayed bridge with 1400 m main span, a partially earth-anchored cable-stayed bridge scheme with the same main span is designed. Numerical investigation on the dynamic characteristics, aerostatic and aerodynamic stability of both two bridge schemes is conducted, and the results are compared to those of a suspension bridge with similar main span, and considering from the aspect of wind stability, the feasibility of using partially earth-anchored cable-stayed bridge in super long-span bridges with ultra-kilometer main span is discussed. Moreover, the effects of structural design parameters including the length of earth-anchored girder, the number of auxiliary piers in side span, the height and width of girder, the tower height etc on the dynamic characteristics, aerostatic and aerodynamic stability of a partially earth-anchored cable-stayed bridge are analyzed, and their reasonable values are proposed. The results show that as compared to fully self-anchored cable-stayed bridge and suspension bridge with similar main span, the partially earth-anchored cable-stayed bridge has greater structural stiffness and better aerostatic and aerodynamic stability, and consequently becomes a favorable structural system for super long-span bridges with ultra-kilometer main span. The partially earth-anchored cable-stayed bridge can achieve greater stiffness and better wind stability under the cases of increasing the earth-anchored girder length, increasing the height and width of girder, setting several auxiliary piers in side span and increasing the tower height.
 Keywords
partially earth-anchored cable-stayed bridge;dynamic characteristics;aerostatic stability;aerodynamic stability;structural design parameters;
 Language
English
 Cited by
1.
Numerical Study on Aerostatic Instability Modes of the Double-Main-Span Suspension Bridge, Shock and Vibration, 2018, 2018, 1  crossref(new windwow)
2.
Nonlinear aerostatic stability analysis of Hutong cable-stayed rail-cum-road bridge, Wind and Structures, 2016, 23, 6, 485  crossref(new windwow)
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