A post-tensioning tendon may include a tension member including a strand and sheath, the sheath having an outer surface. The post-tensioning tendon may also include an anchor coupled to an end of the tension member, the anchor including a tubular extension through which the tension member is passed.
A post-tensioning tendon may include a tension member including a strand and sheath, the sheath having an outer surface. The post-tensioning tendon may also include an anchor coupled to an end of the tension member, the anchor including a tubular extension through which the tension member is passed. The tubular extension may have an engaging surface. The post-tensioning tendon may additionally include a sheathing retention assembly. The sheathing retention assembly may include an outer cap, the outer cap having a forcing surface. The outer cap may be coupled to the tubular extension. The sheathing retention assembly also may include one or more holding elements positioned at least partially within the outer cap. The one or more holding elements may each have a tapered outer surface abutting the forcing surface. The one or more holding elements each may include an inner surface that engages the outer surface of the sheath.
대표청구항▼
1. A post-tensioning tendon comprising: a tension member including a strand and a sheath, the sheath having an outer surface;an anchor coupled to an end of the tension member, the anchor including a tubular extension through which the tension member is passed; anda sheathing retention assembly inclu
1. A post-tensioning tendon comprising: a tension member including a strand and a sheath, the sheath having an outer surface;an anchor coupled to an end of the tension member, the anchor including a tubular extension through which the tension member is passed; anda sheathing retention assembly including: an outer cap, the outer cap having a forcing surface, the outer cap coupled to the tubular extension; andone or more sheath holding elements positioned at least partially within the outer cap, the one or more sheath holding elements each having a tapered outer surface engaging the forcing surface, the one or more holding elements each including an inner surface that engages the outer surface of the sheath, wherein engagement of the tapered outer surface with the forcing surface biases holding elements radially inward into contact with the sheath thereby increasing normal force between the holding elements and the sheath and causing the holding elements to grip the sheath, wherein each of the one or more sheath holding elements further comprises a flange, and wherein the sheathing retention assembly further comprises a spacing collet, the spacing collet positioned within the outer cap and positioned to fit within the flanges of the one or more sheath holding elements. 2. The post-tensioning tendon of claim 1 having a plurality of sheath holding elements, wherein the inner surfaces of the plurality of sheath holding elements form an inner face. 3. The post-tensioning tendon of claim 2, wherein the inner face has teeth, wherein the teeth of the inner face contact the outer surface of the sheath. 4. The post-tensioning tendon of claim 1, wherein the outer cap couples to the tubular extension by a coupler selected from the group consisting of a threaded, detent, press lock, bayonet, or tab-and-slot coupler. 5. The post-tensioning tendon of claim 4, wherein the tubular extension has an engaging surface, and wherein the coupler is a tab-and-slot coupler, wherein the tab-and-slot coupler comprises: one or more slots formed in the outer cap; andone or more tabs formed on an engaging surface of the tubular extension, wherein the one or more slots receive the one or more tabs. 6. The post-tensioning tendon of claim 4, wherein the coupler is a bayonet coupler, wherein the bayonet coupler comprises: one or more outer cap bayonet ramps positioned on the outer cap; andone or more tubular extension ramps positioned on the tubular extension, wherein the outer cap bayonet ramps interconnect with the one or more tubular extension bayonet ramps. 7. The post-tensioning tendon of claim 1, further comprising a seal, the seal positioned within the outer cap, the seal further positioned between the outer surface of the sheath and the tubular extension. 8. The post-tensioning tendon of claim 1, wherein the one or more sheath holding elements are arcuate wedges. 9. The post-tensioning tendon of claim 8, wherein the arcuate wedges include a partial split. 10. A post-tensioning tendon comprising: a tension member including a strand and a sheath, the sheath having an outer surface;an anchor coupled to an end of the tension member, the anchor including a tubular extension through which the tension member is passed; anda sheathing retention assembly including: an outer cap, the outer cap having a forcing surface, the outer cap coupled to the tubular extension; andone or more sheath holding elements positioned at least partially within the outer cap, the one or more sheath holding elements each having a tapered outer surface engaging the forcing surface, the one or more sheath holding elements each including an inner surface that engages the outer surface of the sheath, wherein engagement of the tapered outer surface with the forcing surface biases sheath holding elements radially inward into contact with the sheath thereby increasing normal force between the sheath holding elements and the sheath and causing the sheath holding elements to grip the sheath;wherein at least one of the one or more sheath holding elements is a wedge, the at least one sheath holding element including a wedged piece and a die face piece, the wedged piece having a tapered outer surface and a flat inner surface, the die face piece having a flat outer portion, the wedged piece and the die piece bonded. 11. A method of coupling a tension member to an anchor for forming a post-tensioning tendon comprising: providing the tension member, the tension member including a strand and a sheath, the sheath having an outer surface;providing the anchor, the anchor including a tubular extension;positioning a sheathing retention assembly about an end of the tension member, the sheathing retention assembly including: an outer cap, the outer cap having a forcing surface; andone or more sheath holding elements positioned at least partially within the outer cap, the one or more sheath holding elements each having a tapered outer surface engaging the forcing surface, the one or more sheath holding elements each including an inner surface that engages the outer surface of the sheath, wherein engagement of the tapered outer surface with the forcing surface biases sheath holding elements radially inward into contact with the sheath thereby increasing normal force between the sheath holding elements and the sheath and causing the sheath holding elements to grip the sheath, wherein each of the one or more sheath holding elements further comprises a flange, and wherein the sheathing retention assembly further comprises a spacing collet, the spacing collet positioned within the outer cap and positioned to fit within the flanges of the one or more sheath holding elements;passing the end of the tension member through the tubular extension of the anchor; andcoupling the outer cap to the tubular extension. 12. The method of claim 11, further comprising: applying a tensile force to the sheath, thereby engaging the one or more sheath holding element with the forcing surface. 13. The method of claim 11, further comprising positioning a seal within the outer cap and further positioning the seal between the outer surface of the sheath and the tubular extension. 14. The method of claim 11, wherein the sheathing retention assembly comprises a single sheath holding element and wherein the single sheath holding element is a single wedge, the method further comprising: positioning the one wedge about only a portion of the sheath;positioning a holding surface in opposition to the one wedge; andcompressing the wedge against the sheath. 15. The method of claim 11, wherein each of the one or more sheath holding elements is a wedge, and wherein each wedge comprises a partial split, the method further comprising: compressing the one or more wedges to flex the one or more wedges, thereby increasing contact between the wedge and the sheath. 16. The method of claim 11 further comprising: positioning a spacing collet at least partially within the outer cap; andforming a friction fit between the spacing collet and the outer surface of the sheath. 17. A method of coupling a tension member to an anchor for forming a post-tensioning tendon comprising: providing the tension member, the tension member including a strand and a sheath, the sheath having an outer surface;providing the anchor, the anchor including a tubular extension;positioning an outer cap about the tubular extension in a non-actuated position, the outer cap having a tapered forcing surface;coupling the outer cap to the tubular extension, thereby moving the outer cap to an actuated position;positioning one or more sheath holding elements at least partially within the outer cap, the one or more sheath holding elements each having a tapered outer surface engaging the forcing surface, the one or more sheath holding elements each including an inner surface that engages the outer surface of the sheath such that application of a tensile force to the sheath in a direction away from the anchor causes the sheath holding elements to engage the forcing surface, wherein each of the one or more sheath holding elements further comprises a flange, and wherein the sheathing retention assembly further comprises a spacing collet, the spacing collet positioned within the outer cap and positioned to fit within the flanges of the one or more sheath holding elements;passing the end of the tension member through the tubular extension; andcoupling the outer cap to the tubular extension. 18. The post-tensioning tendon of claim 10 having a plurality of sheath holding elements, wherein the inner surfaces of the plurality of sheath holding elements form an inner face. 19. The post-tensioning tendon of claim 18, wherein the inner face has teeth, wherein the teeth of the inner face contact the outer surface of the sheath. 20. The post-tensioning tendon of claim 10, wherein the outer cap couples to the tubular extension by a coupler selected from the group consisting of a threaded, detent, press lock, bayonet, or tab-and-slot coupler. 21. The post-tensioning tendon of claim 20, wherein the tubular extension has an engaging surface, and wherein the coupler is a tab-and-slot coupler, wherein the tab-and-slot coupler comprises: one or more slots formed in the outer cap; andone or more tabs formed on an engaging surface of the tubular extension, wherein the one or more slots receive the one or more tabs. 22. The post-tensioning tendon of claim 20, wherein the coupler is a bayonet coupler, wherein the bayonet coupler comprises: one or more outer cap bayonet ramps positioned on the outer cap; andone or more tubular extension ramps positioned on the tubular extension, wherein the outer cap bayonet ramps interconnect with the one or more tubular extension bayonet ramps. 23. The post-tensioning tendon of claim 10, further comprising a seal, the seal positioned within the outer cap, the seal further positioned between the outer surface of the sheath and the tubular extension. 24. The post-tensioning tendon of claim 10, wherein the one or more sheath holding elements are arcuate wedges. 25. The post-tensioning tendon of claim 24, wherein the arcuate wedges include a partial split. 26. The post-tensioning tendon of claim 10, wherein each of the one or more sheath holding elements further comprises a flange, wherein the sheathing retention assembly further comprises a spacing collet, the spacing collet positioned within the outer cap and positioned to fit within the flanges of the one or more sheath holding elements. 27. A method of coupling a tension member to an anchor for forming a post-tensioning tendon comprising: providing the tension member, the tension member including a strand and a sheath, the sheath having an outer surface;providing the anchor, the anchor including a tubular extension;positioning a sheathing retention assembly about an end of the tension member, the sheathing retention assembly including: an outer cap, the outer cap having a forcing surface; andone or more sheath holding elements positioned at least partially within the outer cap, the one or more sheath holding elements each having a tapered outer surface engaging the forcing surface, the one or more sheath holding elements each including an inner surface that engages the outer surface of the sheath, wherein engagement of the tapered outer surface with the forcing surface biases sheath holding elements radially inward into contact with the sheath thereby increasing normal force between the sheath holding elements and the sheath and causing the sheath holding elements to grip the sheath, wherein at least one of the one or more sheath holding elements includes a wedged piece and a die face piece, the wedged piece including a tapered outer surface and a flat inner surface, the die face piece having a flat outer portion, the wedged piece and the die piece bonded;passing the end of the tension member through the tubular extension of the anchor; andcoupling the outer cap to the tubular extension. 28. The method of claim 27 having a plurality of sheath holding elements, wherein the inner surfaces of the plurality of sheath holding elements form an inner face. 29. The method of claim 28 wherein the inner face has teeth, wherein the teeth of the inner face contact the outer surface of the sheath. 30. The method of claim 27 wherein the outer cap couples to the tubular extension by a coupler selected from the group consisting of a threaded, detent, press lock, bayonet, or tab-and-slot coupler. 31. The method of claim 30, wherein the tubular extension has an engaging surface, and wherein the coupler is a tab-and-slot coupler, wherein the tab-and-slot coupler comprises: one or more slots formed in the outer cap; andone or more tabs formed on an engaging surface of the tubular extension, wherein the one or more slots receive the one or more tabs. 32. The method of claim 30 wherein the coupler is a bayonet coupler, wherein the bayonet coupler comprises: one or more outer cap bayonet ramps positioned on the outer cap; andone or more tubular extension ramps positioned on the tubular extension, wherein the outer cap bayonet ramps interconnect with the one or more tubular extension bayonet ramps. 33. The method of claim 27, further comprising a seal, the seal positioned within the outer cap, the seal further positioned between the outer surface of the sheath and the tubular extension. 34. The method of claim 27 wherein the one or more sheath holding elements are arcuate wedges. 35. The method of claim 34 wherein the arcuate wedges include a partial split. 36. A method of coupling a tension member to an anchor for forming a post-tensioning tendon comprising: providing the tension member, the tension member including a strand and a sheath, the sheath having an outer surface;providing the anchor, the anchor including a tubular extension;positioning an outer cap about the tubular extension in a non-actuated position, the outer cap having a tapered forcing surface;coupling the outer cap to the tubular extension, thereby moving the outer cap to an actuated position;positioning one or more sheath holding elements at least partially within the outer cap, the one or more sheath holding elements each having a tapered outer surface engaging the forcing surface, the one or more sheath holding elements each including an inner surface that engages the outer surface of the sheath such that application of a tensile force to the sheath in a direction away from the anchor causes the sheath holding elements to engage the forcing surface, wherein each of the one or more sheath holding elements further comprises a flange, and wherein the sheathing retention assembly further comprises a spacing collet, the spacing collet positioned within the outer cap and positioned to fit within the flanges of the one or more sheath holding elements;passing the end of the tension member through the tubular extension; andcoupling the outer cap to the tubular extension;wherein at least one of the one or more sheath holding elements includes a wedged piece and a die face piece, the wedged piece including a tapered outer surface and a flat inner surface, the die face piece having a flat outer portion, the wedged piece and the die piece bonded. 37. The method of claim 36 having a plurality of sheath holding elements, wherein the inner surfaces of the plurality of sheath holding elements form an inner face. 38. The method of claim 37 wherein the inner face has teeth, wherein the teeth of the inner face contact the outer surface of the sheath. 39. The method of claim 36 wherein the outer cap couples to the tubular extension by a coupler selected from the group consisting of a threaded, detent, press lock, bayonet, or tab-and-slot coupler. 40. The method of claim 39, wherein the tubular extension has an engaging surface, and wherein the coupler is a tab-and-slot coupler, wherein the tab-and-slot coupler comprises: one or more slots formed in the outer cap; andone or more tabs formed on an engaging surface of the tubular extension, wherein the one or more slots receive the one or more tabs. 41. The method of claim 39 wherein the coupler is a bayonet coupler, wherein the bayonet coupler comprises: one or more outer cap bayonet ramps positioned on the outer cap; andone or more tubular extension ramps positioned on the tubular extension, wherein the outer cap bayonet ramps interconnect with the one or more tubular extension bayonet ramps. 42. The method of claim 36, further comprising a seal, the seal positioned within the outer cap, the seal further positioned between the outer surface of the sheath and the tubular extension. 43. The method of claim 36 wherein the one or more sheath holding elements are arcuate wedges. 44. The method of claim 43 wherein the arcuate wedges include a partial split.
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이 특허에 인용된 특허 (56)
Hayes, Norris O.; Draginis, Randy, Anchor for post tension concrete reinforcing systems.
Wlodkowski Johann (Munich DEX) Jungwirth Dieter (Munich DEX), Recoverable formwork part for forming the anchoring location of a tendon in a concrete structural component.
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