Super-long span suspension bridge

Details Super-long span suspension bridge Super-long span suspension bridge

1996-10-02

1998-07-28

Lisehora, James

Bridges

Suspension

14 19, E01D 1102

Patent

active

057847398

ABSTRACT:
As a countermeasure against storms for long span, particularly super-long span suspension bridges with the center span exceeding 2,000 m, there is provided a super-long span suspension bridge which can be improved of its static and dynamic wind resistance performance by applying a mass to a portion of the girder. In a suspension bridge with the center span exceeding 2,000 m, a mass application member capable of temporarily carrying a predetermined amount of additional load is provided on either side of the stiffening girder for a distance equal to 1/3 at the maximum of the center span so that a mass weighing 30% or less of the weight of the girder is temporarily applied in the mass application member in the girder on the windward side when the bridge is subjected to a storm, and cross stays are provided each at a point inward from either end of the center span section at a distance equal to 1/4 to 1/3 of the center span.

REFERENCES:
patent: 4451950 (1984-06-01), Richardson
patent: 4665578 (1987-05-01), Kawada et al.
patent: 5539946 (1996-07-01), Kawada

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