High-ductility mortar energy dissipation and shock absorption device for flexural parallel dog bone hole mild steel plate

By using a combination of bending-resistant parallel dog-bone hole soft steel plates and high-ductility mortar in a steel frame-support structure, the problem of unstable performance of existing energy dissipation and vibration reduction devices under temperature and medium aging was solved, achieving a highly efficient energy dissipation and vibration reduction effect of two seismic defense lines.

CN224063710UActive Publication Date: 2026-03-31KUNMING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202423280305.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2026-03-31
Estimated Expiration
2034-12-30

AI Technical Summary

Technical Problem

Existing energy dissipation and vibration reduction devices, such as viscous dampers, viscoelastic dampers, and metal dampers, are unstable in performance under factors such as temperature changes and medium aging, making it difficult to achieve performance-based design and have high manufacturing costs. Traditional soft steel dampers have low initial stiffness and large yield displacement, making it difficult to meet the needs of multiple seismic defense lines.

Method used

An energy dissipation and vibration reduction device is adopted, which combines bending parallel dog bone hole soft steel plate with high ductility mortar. The steel frame-support structure is connected by high-strength bolts. The synergistic deformation of the soft steel plate and high ductility mortar consumes seismic energy, forming two seismic defense lines, including high shear stiffness under minor earthquakes and buckling deformation energy dissipation under major earthquakes.

Benefits of technology

It achieves effective control of inter-story displacement and dissipation of seismic energy under both minor and major earthquakes, reduces manufacturing costs, overcomes temperature sensitivity and medium aging problems, and has the performance-based design capability of two seismic defense lines.

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Abstract

The utility model discloses a bending parallel dog bone hole mild steel plate high-ductility mortar energy dissipation and shock absorption device which is composed of an upper connecting steel plate with a round hole, a lower connecting steel plate, a lower connecting steel plate, an upper connecting steel plate with a round hole, a lower connecting steel plate, a lower connecting steel plate, a lower connecting steel plate, a lower connecting steel plate and a lower connecting steel plate, wherein the upper connecting steel plate is connected with a lower flange of an H-shaped steel frame beam; the upper connecting steel plate and the lower connecting steel plate are welded between the upper connecting steel plate and the lower connecting steel plate, and the left-side and right-side blocking skin dog-bone hole mild steel plate, the bending parallel dog-bone hole mild steel plate and the front-back blocking mild steel plate are welded between the upper connecting steel plate and the lower connecting steel plate. And the upper and lower connecting steel plates are connected with the high-strength bolt system of the steel frame-supporting structure. Under the action of strong shock, the front and rear plugging mild steel plates are subjected to buckling deformation energy dissipation and shock absorption, the sections of the parallel dog bone hole mild steel plates are subjected to nearly-equal-strength bending plastic deformation consumption shock absorption, and the high-ductility mortar combined with the mild steel plates is subjected to whole-process consumption shock absorption of cracking, yielding and damage, so that the energy dissipation and shock absorption effect of the device can be effectively improved.
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