PCa joint material
The PCa joint member addresses tendon rusting and collision issues in high-rise buildings by using rust-preventive materials and viscoelastic materials in sheath tubes, ensuring efficient construction and structural reliability.
JP7749898B2Active Publication Date: 2025-10-07FUJITA CO LTD
5 Cites 0 Cited by
Patent Information
- Application Number
- JP2021196378
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-12-02
- Publication Date
- 2025-10-07
- Estimated Expiration
- 2041-12-02
AI Technical Summary
Technical Problem
The construction of high-rise buildings using precast prestressed concrete (PCaPC) joint members is hindered by the time-consuming process of grout filling in sheath tubes and the risk of tendon rusting and damage due to unbonded tendons in joint areas, especially during earthquakes.
Method used
A PCa joint member design where unbonded tendons are used with rust-preventive materials applied to joint areas and viscoelastic materials disposed in gaps between tendons and sheath tubes, optionally with a stiffener to prevent rusting and collision damage.
Benefits of technology
This design prevents tendon rusting and collision damage, reducing construction time by eliminating the need for grout filling and enhancing structural integrity during building deformation.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a PCa joint member which has PCa members connected to each other via tendons in an unbonded state, capable of inhibiting or suppressing the breakage of the PCa members in a joint area due to the rust development of the tendons or the collision of the tendons with sheath pipes.SOLUTION: A PCa joint member 100 has PCa members 10, 20 including a plurality of precast-concrete sheath pipes 16, 26 joined to each other while allowing the communication of the corresponding sheath pipes 16, 26 therewith to form a communication sheath pipe 30. Tendons 17, 27 are inserted into all the communication sheath pipes 30, the tendons 17, 27 are strained in an unbonded state. and a rust-proofing material 50 is applied to a joint area A straddling a joint interface 80 between at least two PCa members 10, 20, out of the tendons 17, 27.SELECTED DRAWING: Figure 1
Need to check novelty before this filing date? Find Prior Art