Ultra high-performance concrete bond anchor
US11982086B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2020 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Aug 11, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04C5/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Ultra-High-Performance Concrete (UHPC), owing to its superior mechanical and durability properties, presents a unique opportunity for innovative use in unbonded post-tensioned floor systems. In unbonded post-tensioned (PT) slabs and beams, the use of cast-in-place steel confined UHPC Bond Anchors (UBA) can be used to anchor steel prestressing strands for better durability, increased strand ductility, cost-effectiveness, and ease of installation. A conical, steel confining device is used as part of the UBA. The device resists hoop tension and eliminates splitting cracks in the UHPC during prestress transfer. It also helps to reduce the anchorage length. High average bond stress helps reduce the UBA length, and consequently, the material consumption. The bond stress at the strand-UHPC interface can be increased by intentionally roughening or indenting the strand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.