Large-span space cable net system suspension bridge

Abstract

The invention discloses a large-span space cable net system suspension bridge, and belongs to the field of civil engineering. The large-span space cable net system suspension bridge mainly comprises arch-shaped bridge towers, main cables, suspension rods, parallel cables, space cable nets, back cables, arch-shaped ring beams, stiffening steel beams, anchorages, bearing platforms, pile foundationsand other structures. A Bessel curve is applied to optimize a traditional portal bridge tower, so that the line shape of the portal bridge tower is smoother, and the anchoring requirement for arranging space cables can be met more easily; the space cable net is arranged in a hyperbolic paraboloid form, so that the space rigidity and the flutter critical wind speed of the cable system are effectively improved; and meanwhile, the excellent mechanical property of the uniparted hyperboloids is applied to improve the appearance of a traditional pile foundation pile body, and the anti-overturning performance is obviously improved under the condition that the anti-bending and anti-shearing bearing capacity of the pile foundation pile body is guaranteed. The large-span space cable net system suspension bridge provided by the invention can greatly improve the wind-resistant stability of the suspension bridge, and can be used as a reference for constructing the large-span space cable net systemsuspension bridge.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a large-span space cable-net system suspension bridge. Background technique [0002] Suspension bridge, also known as suspension bridge, is a bridge structure in which the main cable is tensioned as the main load-bearing member. It has the characteristics of large spanning capacity, reasonable force, and the best use of material strength. It is favored for its advantages of speed and convenience. Modern suspension bridges originated in the United States. The Brooklyn Bridge with a main span of 486m was built in New York in 1883 and is considered to be the starting point of modern suspension bridges. my country's modern suspension bridges started relatively late, but developed rapidly. At present, the Xiamen Haicang Bridge, Jiangyin Yangtze River Bridge, and Runyang Yangtze River Bridge have been built successively, marking that my country's suspension bridges have st...

AI Technical Summary

Problems solved by technology

The first two methods have limited effect on improving the wind resistance stability. The new space cable system only needs to add some construction procedures. By changing the cable system, the torsional vibration and lateral horizontal vibration of the suspension bridge are coupled to a certain extent, improving The dynamic stability of the cable system to improve the wind resistance stability of the whole bridge can improve the torsional stiffness and lateral stiffness of the suspension bridge structure, and obtain good wind resistance performance

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