Variable Stiffness Tensile Sliding Device

Abstract

The invention relates to the technical field of engineering structure seismic isolation, in particular to a variable stiffness tensile sliding device. The variable stiffness tensile sliding device comprises two groups of sliding components which are horizontally arranged from top to bottom; the two groups of sliding components are perpendicular to each other; each group of sliding components comprises a slide block and a slide rail; the slide rails comprise first wing plates; the slide blocks are connected to the first wing plates in a slideable manner; the first wing plates are in an arc shapes in the sliding directions of the slide blocks; the arc shapes of the upper and lower first wing plates are oppositely raised; and the slide block at the top is connected with the slide block at thebottom through a flexible connecting piece. According to the variable stiffness tensile sliding device, as the first wing plates, connected with the slide blocks, on the slide rails are in arc shapes, the arcs are low in the middle and high on the two sides, and the larger the movements of the slide blocks are, the larger elongation, caused by the height changes of the first wing plates, of the flexible connecting piece is, and the larger the tension of the flexible connecting piece is; and therefore, the friction forces between the slide blocks and the slide rails are gradually increased sothat the slide blocks can realize variable stiffness characteristics in the horizontal directions during sliding on the slide rails.

Description

technical field [0001] The invention relates to the technical field of seismic isolation of engineering structures, in particular to a tension-slip device with variable stiffness. Background technique [0002] In recent years, with the rapid advancement of urbanization and social modernization in my country, the rapid increase in population density and the sharp increase in social wealth, the attention of all walks of life to the seismic performance of engineering structures including buildings, bridges, roads, and pipelines has increased significantly. How to further improve the overall earthquake resistance and disaster prevention ability of the structure on the existing basis and meet the higher requirements of human beings for safety, comfort, and economy are currently hot issues in the field of earthquake resistance of engineering structures. [0003] The basic principle of structural shock absorption is to reduce the horizontal stiffness of the structure, prolong the n...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the existing seismic isolation structure bearing has a fixed stiffness after yielding, and the isolation period is fixed, which may resonate with the long-period earthquake near the fault, and the shock absorption effect is poor.

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