Suspension Bridge and Construction Method of Saddle Parabolic Space Hybrid Cable System

Abstract

The invention provides a suspension bridge with a packsaddle paraboloid space mixing cable system. The suspension bridge comprises bridge towers, parallel wire ropes, packsaddle paraboloid cable nets and space stay cable nets, wherein each bridge tower comprises a portal type frame column, a parabola-shaped tower cap and tower cap supporting oblique cylinders; the parallel wire ropes are hung between the bridge towers; the end parts of the parallel wire ropes are fixed through an anchorage; each packsaddle paraboloid cable net is a space cable net formed by the sinking of a packsaddle paraboloid space net, and is coated on the parallel wire ropes; a plurality of steel structure curved beams are also arranged on the packsaddle paraboloid cable nets I, and the parallel wire ropes, the packsaddle paraboloid cable networks and the steel structure curved beams are fixed through a corresponding fixture; the space stay cable nets are respectively arranged on two sides of the parallel wire ropes; and the upper end of each space stay cable net is anchored in the corresponding tower cap supporting oblique cylinders, and the lower end of each space stay cable net is connected with the corresponding reinforced steel girder. The suspension bridge disclosed by the invention has the advantages of being high in spanning capacity, high in structural space rigidity, good in wind resisting stability, convenient to construct and the like, so that the problem of the wind resisting stability of an extra-large span suspension bridge is fundamentally solved.

Description

technical field

[0001] The invention relates to the field of civil engineering, in particular to a suspension bridge with a saddle parabolic space hybrid cable system and a construction method thereof. Background technique

[0002] For traditional suspension bridges with parallel cable systems, as the span increases, the vertical deflection frequency and torsional vibration frequency both decrease and gradually tend to approach each other, resulting in flutter at low wind speeds. Therefore, how to improve the spanning capacity of the suspension bridge and at the same time ensure that the super-long-span suspension bridge has sufficient lateral stiffness and wind resistance stability are two major problems faced by the super-long-span suspension bridge.

[0003] There are three ways to improve the wind resistance of long-span suspension bridges: improving the aerodynamic performance of the section, controlling the vibration characteristics of the structure, and changing the s...

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