Long-span bridges

Details Long-span bridges Long-span bridges

E - Fixed Constructions

01

D

14/9

E01D 11/00 (2006.01) E01D 11/02 (2006.01)

Patent

CA 1169208

(Fig.2) ABSTRACT OF THE DISCLOSURE A suspension bridge has a first deck 10 supported from a pair of suspension cables 14 and 15 by hangers 12 and 13 and a second deck 11 independently supported from a pair of suspension cables 18 and 19 by hangers 20 and 21. The two parallel decks are separated by a gap whose width is not less than that of either of the decks and is preferably three or more times the width of a deck. The decks are joined at intervals along their length by stiff transverse girders 22 and intervening diagonal shear braces so that the two decks behave essentially as a single rigid body in regard to rotation in the plane of Fig.2. This results in very high aerodynamic damping of both torsional and bending modes of oscillation.

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