A UHPC modular building energy dissipation connection node

By connecting low-yield-point metal dampers in series on the vertical grouting sleeves of UHPC modular buildings and reserving cavities in the corner columns to combine with external constraints, a controllable yielding, visible and replaceable energy-consuming connection node is constructed. This solves the problem of uncontrollable damage and difficult repair of UHPC modular buildings under rare earthquakes, and realizes rapid repair and multi-level fortification.

CN122304436APending Publication Date: 2026-06-30HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV
Filing Date
2026-05-08
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

UHPC modular building vertical grouting sleeve nodes are prone to concentrated damage to connectors under rare earthquakes. The location of the damage is uncontrollable and difficult to repair. There is a lack of a systematic replaceable energy dissipation mechanism, and the high strength of UHPC corner columns is not fully utilized as buckling restraint jackets.

Method used

A low yield point metal damper is connected in series above the vertical grouting sleeve and placed in the reserved cavity of the UHPC corner column. It is connected to the pre-embedded connector by high-strength bolts to form a controllable yield, visible and replaceable energy-dissipating connection node. The high strength of the UHPC corner column is used as an external buckling restraint, and an inspection opening is set for easy replacement.

Benefits of technology

This technology concentrates earthquake damage within a visible and removable metal damper, preventing brittle failure of the grouting sleeve and UHPC corner column. It allows for rapid replacement after an earthquake, improving structural toughness and recoverability, and reducing repair costs and construction time.

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Abstract

This invention relates to the field of seismic resistance in buildings, and in particular to an energy-dissipating connection node for UHPC modular buildings. A low-yield-point metal damper is connected in series in the stress path of the grouting sleeve of the vertical reinforcement of the upper and lower modules, and is arranged in a reserved cavity in the corner column of the UHPC, and connected to the embedded parts of the upper and lower modules by high-strength bolts. During minor earthquakes, the damper and the grouting sleeve work together to ensure the stiffness of the node; during major earthquakes, the damper yields preferentially and stably dissipates energy under the external buckling restraint provided by the UHPC corner column, avoiding damage to the UHPC body and the grouting sleeve. The damper can be disassembled and installed from the inspection port at the corner of the module, enabling rapid replacement after an earthquake. This node forms a multi-level seismic fortification system of "undamaged main body and replaceable connection", which has high ductility, energy dissipation capacity and repairability, and is suitable for the seismic design and reinforcement of mid-to-high-rise UHPC modular buildings.
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