Two-way vibration absorption and isolation support suitable for cable-stayed bridge and suspension bridge

Abstract

A two-way vibration absorption and isolation support suitable for a cable-stayed bridge and a suspension bridge is used for solving the problem that the anti-seismic effect is poor. The two-way vibration absorption and isolation support is composed of a vertical vibration absorption mechanism, a one-way sliding mechanism and a horizontal vibration absorption mechanism, all of which are sequentially arranged from top to bottom. The vertical vibration absorption mechanism comprises a first flat board, a second flat board and four sets of disc spring assemblies arranged between the two flat boards, first C-shaped soft steel I is arranged on the periphery of the first flat board and on the periphery of the second flat board, and a pre-locking sleeve and a first shearing force pin are arranged between the first board and the second board. The one-way sliding mechanism comprises a first sliding board and a second sliding board. The horizontal vibration absorption mechanism comprises a bottom board and second C-shaped soft steel II. The support is transformed on the basis of a one-way movable spherical steel support, the shearing force pin and a horizontal C-shaped soft steel damping component are additionally arranged, disc spring components and a vertical C-shaped soft steel damper are connected in series, and the requirement for the structural static force design and the requirements for transverse bridge direction and vertical vibration absorption energy consumption of the cable-stayed bridge and the suspension bridge are met at the same time.

Description

technical field [0001] The invention relates to the technical field of bridge supports, in particular to a bidirectional shock-absorbing and isolating support suitable for cable-stayed bridges and suspension bridges. Background technique [0002] Cable-stayed bridges and suspension bridges have strong spanning ability and beautiful shape, and have been more and more widely used in bridge construction in my country, especially when crossing special terrains such as large rivers, rivers or canyons. The structural mechanical characteristics of cable-stayed bridges and suspension bridges are similar: the load of the main girder is transmitted to the bridge tower through the cable-stayed bridge, suspenders, and main cables respectively, so the bridge towers of cable-stayed bridges and suspension bridges are often thicker, and Great stiffness. Larger stiffness leads to greater response of bridge towers under earthquake action, especially when the bridge span is large or the bridg...

AI Technical Summary

Problems solved by technology

[0005] When the traditional seismic design method is adopted for the horizontal and vertical earthquakes of cable-stayed bridges and suspension bridges, due to the importance of the bridge towers to maintain the structural system, it is usually required to maintain an elastic state during earthquakes, so it can only rely on the strength of the bridge towers to resist Earthquake force, lack of reasonable energy consumption structure, the design can only meet the requirements by increasing the cross-sectional size of the bridge tower, reinforcement, and foundation scale, resulting in a large amount of waste of materials, increased construction costs and increased construction difficulty

Especially under the action of near-field earthquakes, the vertical seismic component is very large, and it is often difficult to meet the design requirements with traditional seismic design methods, and the design is very difficult

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