EP3222793A1 - Anker - Google Patents

Anker Download PDF

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Publication number
EP3222793A1
EP3222793A1 EP16205459.7A EP16205459A EP3222793A1 EP 3222793 A1 EP3222793 A1 EP 3222793A1 EP 16205459 A EP16205459 A EP 16205459A EP 3222793 A1 EP3222793 A1 EP 3222793A1
Authority
EP
European Patent Office
Prior art keywords
anchor
coupler body
insert
coupler
coupling
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.)
Withdrawn
Application number
EP16205459.7A
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English (en)
French (fr)
Inventor
Felix L. Sorkin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3222793A1 publication Critical patent/EP3222793A1/de
Withdrawn legal-status Critical Current

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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

Definitions

  • the present disclosure relates generally to post-tension anchors. More particularly, the present disclosure relates to an anchor used in post-tensioning concrete.
  • Many structures are built using concrete, including, for instance, buildings, parking structures, apartments, condominiums, hotels, mixed-use structures, casinos, hospitals, medical buildings, government buildings, research/academic institutions, industrial buildings, malls, bridges, pavement, tanks, reservoirs, silos, foundations, sports courts, and other structures.
  • Prestressed concrete is structural concrete in which internal stresses are introduced to the concrete member to reduce potential tensile stresses in the concrete resulting from applied loads; prestressing may be accomplished by post-tensioned prestressing or pre-tensioned prestressing.
  • prestressing may be accomplished by post-tensioned prestressing or pre-tensioned prestressing.
  • a tension member is tensioned after the concrete has attained a specified strength by use of a post-tensioning tendon.
  • the post-tensioning tendon may include for example and without limitation, anchors, the tension member, and sheathes or ducts.
  • a tension member could be any suitable material exhibiting tensile strength which can be elongated including, for example and without limitation, reinforcing steel, single or multi-strand cable.
  • the tension member may be formed from a metal or composite without deviating from the scope of this disclosure.
  • the post-tensioning tendon includes an anchor at each end.
  • the tension member is fixedly coupled to a fixed anchor positioned at one end of the tension member, the so-called “fixed-end” of the tension member, and is adapted to be stressed at the stressing anchor, the "stressing-end” of the tension member.
  • the concrete may be poured into a concrete form.
  • the concrete form may be a form or mold into which concrete is poured or otherwise introduced to give shape to the concrete as it sets or hardens thus forming a concrete member.
  • Each anchor is typically nailed to the concrete form to attach the anchor to the concrete form in which the concrete member is to be formed.
  • a pocket former may be utilized to prevent concrete from filling the area between the stressing anchor and the concrete form used to form the concrete member. Once the concrete has sufficiently hardened and the concrete form is removed, the pocket former is removed from the concrete member. Traditionally, pocket formers are tapered to, for example, allow for easier removal from the concrete member. Typically, once the post-tensioning tendon is stressed, thereby forming a post-tensioned concrete member, and the pocket former removed, the pocket formed by the pocket former is filled with a material such as a cementitious chloride-free grout or concrete to, for example, provide fire protection and corrosion protection.
  • the present disclosure provides for an anchor for a post-tensioning tendon.
  • the anchor includes an anchor body and an insert at least partially within the anchor body.
  • the anchor also includes a coupler body, the coupler body mechanically coupled to the insert, and a coupler nut, the coupler nut coupled to the coupler body.
  • the present disclosure also provides for a method of forming a post-tensioned concrete member.
  • the method includes positioning a post-tensioning tendon within a concrete form, the post-tensioning tendon including a tension member, a fixed anchor, and a stressing anchor.
  • the fixed anchor is positioned at a first position within the concrete form
  • the stressing anchor is positioned at a second position within the concrete form.
  • the tension member extends between the fixed anchor and the stressing anchor, where one or both of the fixed anchor and stressing anchor include an anchor body, an insert at least partially within the anchor body, a coupler body, and a coupler nut.
  • the method also includes mechanically coupling the coupler body to the insert and positioning the coupler body through an end of the concrete form.
  • the method also includes threadedly coupling the coupler nut to the coupler body and placing concrete into the concrete form.
  • the method includes tensioning the tension member.
  • post-tensioning tendon 11 may be positioned within concrete form 21.
  • Post-tensioning tendon 11 may include for example and without limitation fixed anchor 13, tension member 15, and stressing anchor 17.
  • Tension member 15 may extend between fixed anchor 13 positioned at a first position within concrete form 21 and stressing anchor 17 positioned at another position within concrete form 21.
  • post-tensioning tendon 11 may also include a sheath (not shown) positioned about tension member 15 and one or more seals (not shown) between the sheath and each anchor.
  • the sheath and seals may, for example, protect tension member 15 from corrosion after concrete 23 (shown in FIG. 1B ) is poured. Additionally, the sheath and seals may, for example, reduce or prevent concrete from ingressing into tension member 15 and preventing or retarding its tensioning as discussed below.
  • a seal for fixed anchor 13 may be omitted.
  • fixed anchor 13 may be positioned within concrete form 21 such that fixed anchor 13 will be encased in concrete 23.
  • fixed end cap 19 may be positioned at the end of fixed anchor 13 to protect tension member 15 from corrosion after concrete 23 is poured.
  • anchor body 101 may be in any configuration positionable within concrete form 21 coupleable to tension member 15 as described herein that retains its position within concrete 23 once concrete 23 sets.
  • anchor body 101 may include anchor plate 101 a positioned to retain stressed anchor 17 in position under tension when positioned in concrete 23.
  • anchor body 101 may further include coupler extension 102. Coupler extension 102 may be generally tubular and may extend from anchor plate 101a.
  • stressed anchor 17 may include coupler body 103.
  • Coupler body 103 may be generally tubular and may mechanically couple to anchor body 101.
  • Coupler body 103 may mechanically couple to anchor body 101 by, for instance and without limitation, a bayonet ramp, threaded connection, or discontinuous threaded connection.
  • coupler body 103 may include anchor coupling flange 104 having coupling features 105 for mechanically coupling coupler body 103 to anchor body 101.
  • Anchor body 101 may include corresponding coupling features 107 formed on interior surface 102a of coupler extension 102 which correspond with coupling features 105 of coupler body 103 for coupling anchor body 101 to coupler body 103.
  • coupling features 105 and corresponding coupling features 107 may be a threaded connection, including, for example and without limitation, straight threads, tapered threads, continuous threads, discontinuous threads, threads of varying density, threads of varying angles, and threads of varying pitch.
  • coupling features 105 and corresponding coupling features 107 may have tapered ends or straight ends, or may constitute male and female ends.
  • coupling features 105 and corresponding coupling features 107 may be corresponding bayonet ramps which engage to mechanically couple coupler body 103 to anchor body 101.
  • coupling features 105 and corresponding coupling features 107 may include one or more tongues and corresponding grooves positioned to press-fit coupler body 103 to anchor body 101.
  • coupler body 103 may couple to anchor body 101 by, for example and without limitation, press fitting, mechanical welding, chemical welding, friction welding, thermal coupling or welding, electrical welding, optical welding, or beam-energy welding.
  • corresponding coupling features 107 may be formed on an interior surface of insert 109.
  • Insert 109 may be positioned within coupler extension 102 of anchor body 101. In some embodiments, insert 109 may be annular. In some embodiments, insert 109 may be a tube positioned on an interior surface 102a of coupler extension 102. In some embodiments, insert 109 may substantially cover interior surface 102a of coupler extension 102. Insert 109 may be mechanically coupled to coupler extension 102 by, for example and without limitation, mechanical coupling such as, but not limited to, press fitting, mechanical welding, chemical welding, friction welding, thermal coupling or welding, electrical welding, optical welding, or beam-energy welding. In some embodiments, insert 109 may be formed from a flame resistant or heat resistant material.
  • insert 109 may be formed from, for example and without limitation a metal such as steel, aluminum, or zinc.
  • cutting operations, such as by torch or other similar methods, of tension member 15 may be undertaken without damaging anchor body 101 as insert 109 may deflect or absorb heat or otherwise prevent heat from a cutting operation away from anchor body 101.
  • coupler body 103 may include threads 111 for mechanically coupling coupler body 103 to concrete form 21. Threads 111 may be formed on an exterior surface of coupler body 103. Coupler nut 113 may include threads 115 that correspond with threads 111 of coupler body 103 for threadedly coupling coupler nut 113 to coupler body 103. In some embodiments, threads 111 and 115 may be any type of threaded connection, including, for example and without limitation, straight threads, tapered threads, continuous threads, discontinuous threads, threads of varying density, threads of varying angles, and threads of varying pitch.
  • threads 111 and 115 may have tapered ends or straight ends, or may constitute male and female ends.
  • coupler body 103 may be coupled to anchor body 101 such that when stressing anchor 117 is positioned in concrete form 21, coupler body 103 extends through a hole formed in end 22 of concrete form 21.
  • Coupler nut 113 may be threaded onto coupler body 103 and tightened.
  • stressing anchor 17 may include pocket former 117.
  • Pocket former 117 may be positioned about coupler body 103 and may slide thereon. Pocket former 117 may be positioned between the end of anchor body 101 and end 22. Pocket former 117 may, for example and without limitation, prevent concrete 23 from filling the space between anchor body 101 and the edge of the resultant concrete member formed by concrete 23 within concrete form 21. Pocket former 117 may thus allow access to tension member 15 from without the concrete member once it is sufficiently hardened and concrete form 21 is removed. Pocket former 117 may be positioned on coupler body 103 before stressing anchor 17 is positioned in concrete form 21 such that it extends from anchor body 101 to end 22 of concrete form 21 as depicted in FIG. 1A .
  • Tension member 15 may be threaded through stressing anchor 17, passing through anchor body 101 and coupler body 103 such that tension member 15 extends from concrete form 21 as depicted in FIG. 1A . Tension member 15 may be threaded through stressing anchor 17 before or after stressing anchor 17 is coupled to end 22 of concrete form 21.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP16205459.7A 2016-03-25 2016-12-20 Anker Withdrawn EP3222793A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662313428P 2016-03-25 2016-03-25
US15/382,284 US20170275881A1 (en) 2016-03-25 2016-12-16 Anchor

Publications (1)

Publication Number Publication Date
EP3222793A1 true EP3222793A1 (de) 2017-09-27

Family

ID=57737577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16205459.7A Withdrawn EP3222793A1 (de) 2016-03-25 2016-12-20 Anker

Country Status (3)

Country Link
US (1) US20170275881A1 (de)
EP (1) EP3222793A1 (de)
CA (1) CA2952688A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108517765A (zh) * 2018-04-13 2018-09-11 重庆交通大学 预应力钢筋锚固装置
WO2020061654A1 (pt) * 2018-09-24 2020-04-02 Evehx Engenharia Ltda Sistema de ancoragem encapsulada para cordoalha, dotada de sistema de corte para o revestimento da cordoalha
US20210381239A1 (en) * 2020-02-27 2021-12-09 Post Tech Manufacturing, Llc Systems and methods for post-tensioning in concrete support systems

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016018166A1 (pt) * 2014-07-31 2016-02-04 Pgpi - Marcas E Patentes, S.A. Processo de construção de estruturas com segmentos vazios e sistema de construção com segmentos vazios
US9982434B1 (en) * 2015-06-04 2018-05-29 Structural Technologies Ip, Llc Encapsulated anchor devices, systems, and methods
US10633861B2 (en) * 2017-11-14 2020-04-28 C&M Machines LLC Post-tension tendon pocket former with a ribbed formwork securing mechanism and method of use thereof
EP3810864B1 (de) * 2018-06-25 2022-07-13 Carbo-Link AG Ankerhülse, ankersystem und verfahren zur herstellung dieser
US11174638B2 (en) * 2018-11-01 2021-11-16 Post Tensioning Solutions LLC Pocket former and method for reanchoring live tendons
US11927012B2 (en) * 2020-12-24 2024-03-12 C & M Machines LLC One piece molded post-tension tendon pocket former with push in retention tabs and method of use thereof
WO2023192035A1 (en) * 2022-03-31 2023-10-05 Rutgers, The State University Of New Jersey Anchorage system for prestressing non-metallic tendons

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594977A (en) * 1993-12-30 1997-01-21 Mccallion; James P. Smooth rod-gripping apparatus
US6023894A (en) * 1998-01-15 2000-02-15 Sorkin; Felix L. Anchor of a post-tension anchorage system with an improved cap connection
US7174685B2 (en) * 2003-02-03 2007-02-13 Hayes Specialty Machining, Ltd. Pocket former for post-tension anchor
US7275347B2 (en) * 2003-02-03 2007-10-02 Hayes Interests, Inc. Post-tension anchor seal cap

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594977A (en) * 1993-12-30 1997-01-21 Mccallion; James P. Smooth rod-gripping apparatus
US6023894A (en) * 1998-01-15 2000-02-15 Sorkin; Felix L. Anchor of a post-tension anchorage system with an improved cap connection
US7174685B2 (en) * 2003-02-03 2007-02-13 Hayes Specialty Machining, Ltd. Pocket former for post-tension anchor
US7275347B2 (en) * 2003-02-03 2007-10-02 Hayes Interests, Inc. Post-tension anchor seal cap

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108517765A (zh) * 2018-04-13 2018-09-11 重庆交通大学 预应力钢筋锚固装置
WO2020061654A1 (pt) * 2018-09-24 2020-04-02 Evehx Engenharia Ltda Sistema de ancoragem encapsulada para cordoalha, dotada de sistema de corte para o revestimento da cordoalha
US20210381239A1 (en) * 2020-02-27 2021-12-09 Post Tech Manufacturing, Llc Systems and methods for post-tensioning in concrete support systems
US20220372761A1 (en) * 2020-02-27 2022-11-24 Post Tech Manufacturing, Llc Systems and methods for concrete support post-tensioning
US11680407B2 (en) * 2020-02-27 2023-06-20 Post Tech Manufacturing, Llc Systems and methods for post-tensioning in concrete support systems

Also Published As

Publication number Publication date
US20170275881A1 (en) 2017-09-28
CA2952688A1 (en) 2017-09-25

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