Importance

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Abstract

The stiffening girder type suspension bridge according to the present invention is designed with a smaller dead load under normal conditions, and applied with a temporary dead load as an additional mass to improve the static characteristics and aerodynamic stability when the bridge is subjected to particularly violent storms that result in significant vibrations and swaying of the bridge. The present invention bridge structure is highly economical. A passage is provided in the stiffening girder at the center of its width along the direction of the bridge axis, so that a temporary dead load as an additional mass can be moved into the passage. Under normal conditions, the passage is kept empty of the load. When an imminent storm is anticipated, a given amount of liquid or solid is transferred into the passage located within the stiffening girder to temporarily apply a given amount of temporary dead load to the stiffening girder during a storm to control vibrations of the bridge caused by the winds.

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First Claim