GB881774A - Improvements in or relating to anchoring methods and devices for pre-stressing bars - Google Patents
Improvements in or relating to anchoring methods and devices for pre-stressing barsInfo
- Publication number
- GB881774A GB881774A GB12085/59A GB1208559A GB881774A GB 881774 A GB881774 A GB 881774A GB 12085/59 A GB12085/59 A GB 12085/59A GB 1208559 A GB1208559 A GB 1208559A GB 881774 A GB881774 A GB 881774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- bar
- concrete
- bearing surface
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
Abstract
881,774. Prestressed concrete. SOC. TECHNIQUE POUR L'UTILISATION DE LA PRECONTRAINTE. April 9, 1959 [May 2, 1958], No. 12085/59. Class 20(4) [Also in Group XXX] An anchoring device for rigid bars for prestressed reinforced concrete comprises two parts 5, 6, Fig. 4, each having a bore through which the reinforcing bar 3 extends, the part 5 being applied against the concrete and the part 6 bearing on the part 5 whilst being capable of pivoting movements in all directions relative thereto, the part 6 comprising a bearing surface 6c perpendicular to the axis of the bore 6e therethrough for the application of apparatus 7 for tensioning the bar and a bearing surface 6d for the means which connect the bar 3 to the anchoring device. The part 6 may be formed as a ball element and the part 5 formed with a complementary spherical socket 5b preferably of a diameter slightly smaller than the radius of the ball. In a modification the part 5 may be provided with a frusto-conical cavity 5b, Fig. 5, in which the ball element engages. The device may be connected to the bar 3 by means of a nut 10 seating on a bearing surface 6d or by frustoconical wedges 8 interposed between the outer surface of the bar 3 and the surface of a frustoconical cavity 6b in the part 6. The tensioning apparatus, Fig. 7, comprises a fluid pressure jack having a part 7 engageable with the bearing surface 6c on the part 6 and having a piston 23 slidable in a body 21 and carrying a piston rod 24 through which the reinforcement rod 3 extends to an element such as a wedge 26, or a nut screwed on to the rod 3, by means of which the rod 3 is anchored to the piston rod 24. The rod 3 is arranged in a sheath 4 which is cut level with the concrete 1 only after the concrete has set. Liquid mortar is injected into the sheath 4 after the rod 3 has been tensioned through slots between the wedges 8 or through a passage 9 in the member 5. A plurality of sockets may be formed in a single bearing plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR881774X | 1958-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB881774A true GB881774A (en) | 1961-11-08 |
Family
ID=9373754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12085/59A Expired GB881774A (en) | 1958-05-02 | 1959-04-09 | Improvements in or relating to anchoring methods and devices for pre-stressing bars |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB881774A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3184219A (en) * | 1963-06-11 | 1965-05-18 | James S Simms | Tensioning units |
| GB2153947A (en) * | 1984-02-04 | 1985-08-29 | Rolls Royce | Attachment means between a strut and a skin |
| US4799307A (en) * | 1986-05-30 | 1989-01-24 | Tech Research, Inc. | Anchor apparatus for a tendon in prestressed concrete slab |
| US5342568A (en) * | 1992-05-21 | 1994-08-30 | Oriental Construction Company | Method for prestressing concrete |
| GB2449652A (en) * | 2007-05-30 | 2008-12-03 | Siemens Magnet Technology Ltd | Rod tensioning mechanism |
| EP2365154A1 (en) * | 2010-03-05 | 2011-09-14 | Hermann Dr.-Ing. Weiher | Device for anchoring tension members |
| CN102877871A (en) * | 2012-10-23 | 2013-01-16 | 山东科技大学 | Yield anchor cable spherical rotating and aligning device |
-
1959
- 1959-04-09 GB GB12085/59A patent/GB881774A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3184219A (en) * | 1963-06-11 | 1965-05-18 | James S Simms | Tensioning units |
| GB2153947A (en) * | 1984-02-04 | 1985-08-29 | Rolls Royce | Attachment means between a strut and a skin |
| US4799307A (en) * | 1986-05-30 | 1989-01-24 | Tech Research, Inc. | Anchor apparatus for a tendon in prestressed concrete slab |
| US5342568A (en) * | 1992-05-21 | 1994-08-30 | Oriental Construction Company | Method for prestressing concrete |
| GB2449652A (en) * | 2007-05-30 | 2008-12-03 | Siemens Magnet Technology Ltd | Rod tensioning mechanism |
| US8393163B2 (en) | 2007-05-30 | 2013-03-12 | Siemens Plc | Suspension rod tensioning arrangements for supporting cryogenic equipment within a cryostat |
| EP2365154A1 (en) * | 2010-03-05 | 2011-09-14 | Hermann Dr.-Ing. Weiher | Device for anchoring tension members |
| CN102877871A (en) * | 2012-10-23 | 2013-01-16 | 山东科技大学 | Yield anchor cable spherical rotating and aligning device |
| CN102877871B (en) * | 2012-10-23 | 2014-09-17 | 山东科技大学 | Yield anchor cable spherical rotating and aligning device |
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