An ultra-high performance steel-concrete composite cable-beam anchorage structure based on combined force transmission

CN117513154BActive Publication Date: 2026-05-26CHANGAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGAN UNIV
Filing Date
2023-11-22
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional anchor box structures in ultra-long span cable-stayed bridges suffer from problems such as high welding difficulty, difficulty in ensuring welding quality, prominent fatigue issues, poor force transmission reliability, and complex construction.

Method used

An ultra-high performance steel-concrete composite cable-beam anchorage structure based on combined force transmission is adopted, including ultra-high performance steel-concrete composite anchor box components and composite webs. UHPC is used to fill the anchor box steel pipes and webs, and the force transmission path is optimized through a combination of PBL connectors and welds.

Benefits of technology

It improves the reliability of the anchorage structure, alleviates weld fatigue problems, simplifies the construction, reduces the number of stiffening ribs and stiffening plates, and makes construction more convenient, making it suitable for ultra-long span cable-stayed bridges.

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Abstract

This invention belongs to the field of bridge engineering technology and relates to an ultra-high performance steel-concrete composite cable-beam anchorage structure based on combined force transmission. It includes a diaphragm, PBL connectors, anchor box steel pipe, anchor pipe, end plate, gasket, and composite web. The ultra-high performance steel-concrete composite anchor box and the composite web are connected by welds and filled internally with UHPC to form the ultra-high performance anchor box steel-concrete composite cable-beam anchorage structure. The ultra-high performance steel-concrete composite cable-beam anchorage structure provided by this invention utilizes the ultra-high local bearing capacity of UHPC by filling the square anchor box steel pipe and web, forming a combined force transmission of steel and UHPC, resulting in more reliable force transmission. It also reduces the number of welds, simplifies the structure, improves anchorage fatigue, and can be constructed by factory prefabrication and on-site assembly, effectively shortening the construction period. It is particularly suitable for cable-beam anchorage structures of ultra-long span cable-stayed bridges.
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