Self-centering system of large-deformation pulley block

Abstract

The invention discloses a self-centering system of a large-deformation pulley block. The self-centering system of the large-deformation pulley block comprises a rectangular middle sleeve pipe, a rectangular inner sleeve pipe positioned in the rectangular middle sleeve pipe, a rectangular outer sleeve pipe arranged outside the rectangular middle sleeve pipe in a sleeving mode, two outer end platesarranged at two ends of the rectangular middle sleeve pipe, two inner end plates arranged at two ends of the rectangular inner sleeve pipe, pulleys arranged at the sides, close to the rectangular inner sleeve pipe, of the inner end plates, a first group of pre-pull rods and a second group of pre-pull rods arranged in the rectangular inner sleeve pipe, a first connecting plate arranged at one end of the rectangular middle sleeve pipe and connected with the rectangular middle sleeve pipe, and a second connecting plate arranged at the other end of the rectangular middle sleeve pipe and connectedwith the rectangular outer sleeve pipe. After the first group of pre-pull rods pass through the pulley connected with the inner end plate at one end, two ends of the first group of pre-pull rods are anchored to the outer end plate at the other end and the inner end plate at the other end respectively. After the second group of pre-pull rods pass through the pulley connected with the inner end plate at the other end, the two ends of the second group of pre-pull rods are anchored to the outer end plate at one end and the inner end plate at one end respectively.

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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