Shape And Sizing Optimization Of Box-girder
Decks Of Cable-stayed Bridges
Author(s)
J.H. Negrao, L.M.C. Simoes
Abstract
Box-girder cross-sections are characterized by large torsional stiffness when
compared with alternative solutions. This is a fundamental issue as the bridge
span increases. Transverse winds may lead to critical stress conditions or cause a
number of aerodynamic instability phenomena, which are related to the torsional
stiffness of the deck. Moreover, in single-plane stayed bridges, the use of box-
girder decks is dictated by equilibrium requirements.
The definition of the cross-section may be rather complex. There are a large
number of parameters involved, load combinations, critical stress locations and
the dependence of the wind loading or seismic response on the geometric and
stiffness characteristics of the deck.
Mathematical programming techniques may thus be val
Keywords
Related Book
Other papers in this volume
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