A Self-Centering System of Large Deformation Pulley Block

Abstract

The invention discloses a self-centering system of a large deformation pulley block, which comprises a rectangular middle sleeve, a rectangular inner sleeve located inside the rectangular middle sleeve, a rectangular outer sleeve set outside the rectangular middle sleeve, and two Two outer end plates at the end of the rectangular inner sleeve, two inner end plates arranged at both ends of the rectangular inner sleeve, a pulley arranged on the side of the inner end plate close to the rectangular inner sleeve, the first set of pre-tension rods and the second set of Two sets of pre-tensioning rods, the first connecting plate arranged at one end of the rectangular middle casing and connected with the rectangular middle casing, the second connecting plate arranged at the other end of the rectangular middle casing and connected with the rectangular outer casing; the first set of pre-tensioning rods After bypassing the pulley connected to the inner end plate at one end, the two ends of the first set of pre-tensioning rods are respectively anchored to the outer end plate at the other end and the inner end plate at the other end; the second set of pre-tensioning rods bypass the inner end plate at the other end After the pulley is connected, the two ends of the second set of pre-tension rods are respectively anchored to one end of the outer end plate and one end of the inner end plate.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a self-centering system of a large deformation pulley block for reducing earthquake disasters of engineering structures. Background technique [0002] Earthquakes bring extremely serious disasters to human beings. The traditional seismic design adopts the ductility design method, that is, under the action of an earthquake, through the early yield and failure of some structural components, but the overall function will not be lost, relying on the plastic deformation of the components to dissipate most of the seismic energy, so as to achieve The purpose of ensuring the safety of the main structure. However, the plastic deformation of components will lead to large residual deformation of the structure after the earthquake, which will greatly increase the difficulty of structural repair. [0003] To control the residual deformation of the structure, a self-centering system consisting...

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Problems solved by technology

[0004] Technical problem: The present invention aims at the problem that the existing self-centering system has a large demand for the elastic elongation of the pre-tie rod, and the traditional prestressed material cannot meet the requirements, and provides a large deformation pulley block that can effectively reduce the demand for the elastic elongation of the pre-tie rod self centering system

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