A Hybrid Dissipative Plastic Hinge with Nonlinear Stiffness
A non-linear, plastic hinge technology, applied in the direction of building types, buildings, building components, etc., can solve the problems of single energy consumption mode, inability to provide plastic hinge restoring force, and unsatisfactory energy consumption efficiency, so as to achieve the goal of improving energy consumption efficiency Effect
Active Publication Date: 2020-07-28
TONGJI UNIV
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Problems solved by technology
[0004] In order to overcome the defects of single energy consumption mode of artificial plastic hinges, unsatisfactory energy consumption efficiency, and inability to provide restoring force to help plastic hinges reset in the prior art, the present invention proposes a non-linear hinge that is widely applicable to truss structures and frame structures. Mixed energy-dissipative plastic hinge with stiffness
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Embodiment 1
[0024] Such as Figure 1-3 As shown, it is a hybrid energy-dissipating plastic hinge with nonlinear stiffness of the present invention, which mainly includes a cylindrical box 1, a partition plate 2, a right connecting plate 3, a right ear plate 4, a limiting plate 5, and a rotating shaft 6 , rotating plate 7, left connecting plate 8, left ear plate 9 and nonlinear SMA spring 14, wherein the rotating shaft 6, rotating plate 7, left ear plate 9 and left connecting plate 8 are welded into a whole to form the left part of the plastic hinge , The cylindrical box 1, the partition plate 2, the limit plate 5, the right ear plate 4 and the right connecting plate 3 are welded together to form the right part. After the limit pin 13 is cut off, the left and right parts can be damaged. relative rotation. During normal use and small earthquakes, the limit pin 13 is not cut off, the limit component provides rotational stiffness, and the plastic hinge is a rigid node; during moderate and la...
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The invention relates to a hybrid energy-dissipating plastic hinge with non-linear rigidity. The hybrid energy-dissipating plastic hinge comprises a first rotating unit and a second rotating unit which are rotationally connected through a rotary shaft. The hybrid energy-dissipating plastic hinge further comprises a viscous energy-dissipating unit and a spring energy-dissipating assembly. The viscous energy-dissipating unit comprises a cylindrical box, a limiting assembly arranged on the outer wall of the cylindrical box, and a viscous liquid partition assembly. The exterior of the cylindricalbox is fixedly connected with the second rotating unit, and the cylindrical box is internally loaded with viscous liquid. The cylindrical box and the rotary shaft are coaxially arranged. During normaluse and small earthquakes, a limiting unit provides rotating rigidity, and the plastic hinge is a rigid joint; and during medium earthquakes and large earthquakes, a limiting pin is sheared, the plastic hinge relatively rotates, and energy input into a structure by earthquakes is dissipated through the viscous energy-dissipating unit and the spring energy-dissipating assembly.
Description
technical field [0001] The invention belongs to the field of energy dissipation and shock absorption of building structures, in particular to a hybrid energy dissipation plastic hinge with nonlinear stiffness. 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 stren...
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IPC IPC(8): E04H9/02E04B1/98
CPCE04H9/021
Inventor 鲁正马乃寅马晨智
Owner TONGJI UNIV