Easy-to-repair plastic hinge using Euler buckling

Abstract

The invention relates to an easy-to-repair plastic hinge using Euler buckling. The plastic hinge comprises an energy dissipation unit, a left connecting plate, a right connecting plate, a left lug plate, a right lug plate and a rotating shaft. The energy dissipation unit consists of elastic rods and springs. The left side part of the easy-to-repair plastic hinge is composed of the left connectingplate and the left lug plate. The right side part of the easy-to-repair plastic hinge is composed of the right connecting plate and the right lug plate. After the elastic rods are subjected to buckling, the left side part and the right side part can be subjected to relative rotation around the rotating shaft. During normal use and a small earthquake, the pressure born by the pressed elastic rods is less than Euler critical force, at this time, the elastic rods have large axial rigidity, and the plastic hinge is a rigid joint; and in the case of middle and large earthquakes, the pressure born by the pressed elastic rods exceeds the Euler critical force, Euler buckling occurs, axial rigidity is decreased rapidly, the elastic rods are subjected to buckling to absorb a large amount of energy,the springs on the upper side and the lower side are pulled and pressed correspondingly and dissipate the energy, the good damping effect is achieved, parts of damaged elastic rods only need to be replaced after the earthquakes, and rapid repair of the plastic hinge can be achieved.

Description

technical field [0001] The invention relates to an easily repairable plastic hinge utilizing Euler buckling. During normal use and small earthquakes, the elastic rod is not buckled and has relatively large axial stiffness, and the easily repairable plastic hinge is a rigid node; during moderate earthquakes and large earthquakes, The compressed elastic rod buckles, the axial stiffness decreases sharply, the elastic rod buckles and absorbs a large amount of energy, and the springs on the upper and lower sides are also respectively stretched or compressed to dissipate energy, which has a good shock absorption effect and belongs to energy dissipation shock absorbing field. Background technique [0002] Plastic hinge means that under the action of load, when the bending moment at several sections in the structure reaches the plastic limit bending moment, the section will rotate to a certain extent, similar to the effect of hinge, resulting in the redistribution of internal forces...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defects of high cost, difficult to repair after earthquake, and influence on the bearing capacity of the structure in the plastic hinge construction method in the prior art, the purpose of the present invention is to propose an easy-to-repair method using Euler buckling that is widely applicable to truss structures and frame structures. Plastic hinges to achieve precise energy dissipation, that is, designate energy-dissipating locations and energy-dissipating components, etc.; and effectively achieve post-earthquake repairability of structures

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