UHPC (Ultra High Performance Concrete) pouring connection method for built-in T-shaped steel joints of fabricated beam columns

Through the high-strength bolt connection, damping device and UHPC pouring method of the built-in T-steel nodes in the prefabricated beams and columns, the bearing capacity and seismic resistance problems of the concrete beam-column nodes in prefabricated buildings are solved, the construction process is simplified, the reliability and consistency of the nodes are improved, and it is suitable for the efficiency, environmental protection and safety needs of modern buildings.

CN120666839AActive Publication Date: 2025-09-19HUNAN UNIV +1
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Patent Information

Application Number
CN202511179782.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2025-09-19
Estimated Expiration
2045-08-22

AI Technical Summary

Technical Problem

In existing prefabricated buildings, the concrete beam-column node connection method is difficult to ensure bearing capacity, stiffness and seismic performance, and the construction is complex, with problems such as loose bolts and high welding operation requirements.

Method used

The prefabricated beam-column with built-in T-steel nodes is used, combined with high-strength bolt connections, damping devices and UHPC pouring. Concrete columns and composite beams are prefabricated through a mold mechanism, damping devices are set and mold grouting is performed at the connection to form a triple connection method.

Benefits of technology

It improves the strength, stiffness and seismic performance of the nodes, simplifies the construction process, reduces the requirements for technical level, reduces construction errors and subsequent maintenance costs, is suitable for factory production, ensures the reliability and consistency of node connections, and is suitable for the development trend of prefabricated buildings.

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Abstract

The invention discloses an assembly type beam column built-in T-shaped steel joint pouring UHPC connecting method which comprises the steps of beam column prefabricating, joint connecting, damping setting and cover die grouting. According to the method, a concrete column with T-shaped steel and a superposed beam are prefabricated through a die mechanism, and then the beam and the T-shaped steel in the column are connected through high-strength bolts; a damping device is arranged between upper and lower opposite wing plates of T-shaped steel, and finally a node connecting part is sleeved with a U-shaped mold and poured with ultra-high strength concrete UHPC, so that the integrity of the node is enhanced, the ductility and energy dissipation capacity of the node are improved, rapid and reliable node connection is realized, the high efficiency of mechanical transmission in a node area is guaranteed, and reliable anti-seismic energy dissipation characteristics are achieved; the method has the advantages of being convenient to construct, excellent in anti-seismic performance, high in node reliability and the like, meets the requirements for high efficiency, environmental protection and safety in modern buildings, and can improve the construction efficiency and structural performance of the fabricated building.
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