Easy-to-repair lead plastic hinge

Abstract

The inVention relates to an easy-to-repair lead plastic hinge. The hinge comprises a first rotating unit and a second rotating unit, the first rotating unit and the second rotating unit are hinged andcan be rotated relatiVe to each other, an energy consuming unit is disposed at the hinge connection position of the first rotating unit and the second rotating unit, the energy consuming unit is composed of a plurality of lead blocks and a limit pin, the lead blocks are embedded between the contact faces of the first rotating unit and the second rotating unit, and the limit pin penetrates throughthe first rotating unit and the second rotating unit. When a normal situation or small earthquake occurs, the limit pin is not cut, and the plastic hinge is a rigid node; when a medium or large earthquake occurs, the limit pin is sheared, the plastic hinge rotates relatiVely, the lead blocks conduct plastic deformation, absorb energy and haVe a good energy-absorbing and shock-absorbing effect, after the earthquake, it is only needed to replace the limit pin, and the quick repairing of the plastic hinge can be achieVed.

Description

technical field [0001] The invention belongs to the field of energy dissipation and shock absorption of building structures, and in particular relates to an easily repairable lead-plastic hinge. 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 in the structure. In order to avoid brittle failure of steel structure beam-column joints under earthquake action, the common treatment method is to move the plastic hinge outward through certain structural measures. Flange type and flange plus armpit type; the second is to locally weaken the flange or web at the beam end, collectively referred to as weakened joints, such as "dog bone" type, web opening type, and welding hole expansion type; the third is to strengthen the joint...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems and provide an easily repairable lead-plastic hinge widely applicable to truss structures and frame structures, which overcomes the difficulty in making frictional plastic hinges in the prior art and the possible occurrence of viscous plastic hinges during use. Defects such as leakage of stagnant liquid, simple processing and easy maintenance during use, stable hysteresis characteristics, good low-cycle fatigue performance, long-term reliability and no environmental influences, etc.

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