Semi-active variable-stiffness energy dissipation and seismic mitigation control anchor bolt

Abstract

A semi-active variable stiffness energy-dissipating shock-absorbing control bolt, the structure of which consists of a controller (1), a communication line (2), a sensor (3), a variable stiffness control device (12), a sleeve (20), and a hollow anchor Tube (5), anchor (10), anchor spring (11) and support structure (4). The variable stiffness control device (12) consists of a hydraulic cylinder (13), a double-rod piston (14), oil (16), a bypass line (17), an electro-hydraulic servo valve (18), a stiffness spring (19a), Stiffness spring (19b), the supporting box (21) that bolt (23) connects and backing plate (22) form. The invention solves the irreversible problems of excessive deformation of the anchor-spray support structure caused by earthquake action, self-adjustment and even destruction of the support structure, and improves the anti-seismic performance of the anchor-spray support structure and the safety and stability of the support body.

Description

technical field [0001] The invention belongs to the field of vibration control of anchor-spray support structures, in particular to a semi-active variable stiffness energy-dissipating shock-absorbing control bolt, which is especially suitable for permanent support projects such as tunnels, mine roadways, and high and steep slopes. Background technique [0002] Earthquake is one of the most serious natural disasters faced by human beings. It caused a series of disasters such as building collapse, tunnel collapse and landslide, which brought huge loss of life and property to human beings. my country is located between the Pacific Seismic Belt and the Eurasian Seismic Belt, and is one of the countries that suffer the most serious earthquake disasters. Therefore, the task of earthquake resistance and disaster prevention is very arduous. Seismic design is mainly committed to ensuring that the structure itself has a certain strength, stiffness and ductility to meet certain seismic...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a semi-active variable stiffness energy-dissipating shock-absorbing control bolt to solve the problem of excessive deformation of the bolt-sprayed support structure and unstable rock and soil caused by earthquakes, or even instability and collapse, which cannot be self-adjusted. , improve the anti-seismic performance of the anchor shotcrete support structure and the safety of the support body

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