EP0563490B1 - Verfahren zur Realisierung mechanischer Betonstahlverbindungen, Verbindung nach diesem Verfahren, Betonstahl für dieses Verfahren und Einrichtung zur Bearbeitung der Betonstähle - Google Patents
Verfahren zur Realisierung mechanischer Betonstahlverbindungen, Verbindung nach diesem Verfahren, Betonstahl für dieses Verfahren und Einrichtung zur Bearbeitung der Betonstähle Download PDFInfo
- Publication number
- EP0563490B1 EP0563490B1 EP92440073A EP92440073A EP0563490B1 EP 0563490 B1 EP0563490 B1 EP 0563490B1 EP 92440073 A EP92440073 A EP 92440073A EP 92440073 A EP92440073 A EP 92440073A EP 0563490 B1 EP0563490 B1 EP 0563490B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- reinforced
- thread
- round
- diameter
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000009434 installation Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title description 2
- 239000004567 concrete Substances 0.000 claims abstract description 75
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims abstract description 3
- 238000007906 compression Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims 8
- 230000003014 reinforcing effect Effects 0.000 description 28
- 238000003825 pressing Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 230000003100 immobilizing effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
Definitions
- the invention relates to a method for producing a mechanical connection of concrete reinforcing bars, as well as to an installation for preparing concrete reinforcing bars. It will find its application in particular in the field of construction of elements, buildings, or buildings of concrete.
- connection by crimping a sleeve is used which is crimped on the two ends of the rounds to be bonded.
- This technique avoids having to rotate one of the circles but nevertheless presents high risks of slipping, due to the crimping, which is difficult to control.
- its implementation is often difficult on a site because it must be able to intervene with a crimping tool, where the connection is to be made.
- the discharge is generally limited to a rate of increase in diameter of around 30%, it is necessary however, to apply pressures during the delivery of very high value up to 400 or even 500 bars.
- Document EP-A-0 327 770 describes a process according to which at least one concrete ring is linked to another concrete round, or to an anchor point, by means of a threaded connection sleeve, the said concrete rod having a nominal section ⁇ , and at least one reinforced end, consisting of cold pressing the end of the concrete rod to be bonded in order to produce a reinforced zone, and in making a thread on said reinforced zone the diameter at the bottom of the thread d2 is equal to or greater than the said nominal section ⁇ .
- EP-B-1 659 264 describes a method of connecting concrete rods, by means of a threaded sleeve, according to which the ribs of the ends of the bars are removed, before making a thread.
- Document FR-A-2 653 809 describes an installation for producing concrete rounds comprising means for immobilizing the round to be prepared, means for cold-pressing axially one end of the concrete round and means for threading this end .
- the aim of the present invention is to propose a method for producing mechanical connections of concrete reinforcing bars which provide total security at the level of the connection and which, for the same dimensioning, withstand dynamic stresses with an alternating traction-compression effect. .
- One of the aims of the present invention is to propose a method for producing a mechanical connection of a concrete reinforcing rod which makes it possible to produce, at the end of the concrete reinforcing rod, a reinforced zone such that the diameter at the bottom of the thread is equal. or greater than the nominal cross section of the concrete reinforcing bar, but which requires a cold discharge of the lesser end, and consequently employing less significant discharge forces.
- Another object of the present invention is to provide a process for producing a mechanical connection from a concrete reinforcing rod which implements a very good quality thread with good tolerances which does not reduce the strength of the end.
- the threading is carried out by rolling, which avoids cutting the fibers of the bar and causing break initiations during dynamic forces.
- Another object of the present invention is to provide an installation for preparing such concrete reinforcing bars which is economical, of a reasonable investment and of reduced size given the forces employed.
- the method of the invention makes it possible to achieve a mechanical connection of a concrete rod to an anchor point or a mechanical connection of two concrete rods end to end substantially coaxially.
- the installation for preparing concrete reinforcing bars according to the invention is characterized in that it comprises means for listening to the surface to be driven back and / or for threading, means for carrying out a threading by rolling of said end. , the so-called means for listening, for cold pressing and for making a thread, being displaceable for be successively placed coaxially in the axis of the concrete block blocked in the immobilization means.
- FIG. 1 shows a mechanical connection of a concrete reinforcing rod produced according to the method of the present invention.
- FIGS. 2a to 2d show the different stages of the process for producing the mechanical connection of the concrete reinforcing bar according to the invention, and more precisely the work of the end of the concrete reinforcing bar used in the method.
- Figure 3 shows an enlarged sectional view showing the dimensional characteristics of the end of the concrete rod of Figure 2d.
- FIG. 4 schematically shows the arrangement of the various means constituting the installation for the preparation of concrete reinforcing bars according to the present invention.
- Figure 1 shows an embodiment of a mechanical connection for ensuring the connection of two concrete rods 1 and 2, end to end, substantially coaxially. Furthermore, this connection implements a tapped sleeve 3 for connection, capable of receiving respectively on one side the threaded end 4 of the first concrete ring 1, and on the other side the end 5 of the second concrete ring 2.
- Each of the concrete reinforcing bars is determined by calculation and then chosen from a standardized or regulated range.
- the characteristic of a concrete reinforcing bar resides essentially in an imposition of weight and section, these being rolled taking into account these imperatives.
- the concrete ring has on its outer face ribs or ribs 6 which create protrusions allowing the immobilization in translation of the round in the concrete when it is embedded in the latter.
- the round has on the one hand a nominal section characterized by ⁇ , which is in a way the section of the core of the round, and a diameter on ribs or ribs marked ⁇ C , as particularly illustrated in the figure 2a.
- each concrete rod to be bonded 1, 2 has at least one reinforced end 4, 5, pushed back and threaded, such that the diameter at the bottom of the thread d2 is equal to or greater than the nominal section ⁇ of the round. This is particularly illustrated in Figures 2d and 3.
- the reinforced end 4, 5 is carried out, by double delivery, a first axial 7, making it possible to increase the diameter of the concrete rod, and a second radial 8 when threading by a rolling technique. .
- the first axial discharge 7 is carried out prior to threading, and the cold end of the concrete ring 1, 2 is cold pressed to be bonded in order to produce a reinforced zone 7 corresponding at least substantially to the diameter d 4 with flanks.
- the second radial discharge 8 is practiced by making a thread 9 on the said reinforced zone 7 by rolling so that the diameter at the bottom of the thread d 2 is equal to or greater than the nominal section ⁇ of the round.
- the upsets 7, 8 are carried out along the length of the thread 9 of said end 4, 5.
- FIG. 2a a first peeling of the end of the round to be reinforced is shown to rid it of its ribs or ribs and to give this end an acceptable cylindricity.
- This peeling is identified by the diameter do close to or very slightly less than the diameter ⁇ .
- the first discharge 7 is carried out at a rate of increase in the diameter of the neighboring end from 15 to 20%.
- This step brings the diameter d 0 to a diameter greater than d3, itself greater than the diameter ⁇ of the circle.
- This cold delivery is achieved by carrying out an axial thrust on the end according to arrow 10.
- this diameter d 4 corresponds to the diameter with flanks of the thread shown in FIG. 3.
- the metal will then be pushed back to constitute the bottom of the thread d 2 , and push it back to constitute the outer part. thread 1 .
- FIG. 2d in which the latter, after a double axial delivery 7 and radial 8, shows a reinforced end such that the diameter at the bottom of the thread d 2 is equal to or greater than the nominal section ⁇ of the round.
- the end 4 and / or 5 of the concrete reinforcing bar 1 and / or 2 reinforced by discharge is prestressed.
- This prestressing makes it possible to cancel all the displacements and elongations of the concrete reinforcing bars and in particular of their ends during safety tests implemented. It is carried out after threading, mechanically by compression of said threaded end.
- the sleeve will be suitable for receiving a single round but will have an external configuration in the form of an anchoring sleeve.
- the M24 thread was produced in steps of 3 by rolling.
- the outside diameter d 1 then being between 23.577 and 23.952 mm, and the bottom diameter d 2 , then corresponding to 20.704 mm is greater than 20 mm of the nominal section of the round HA20.
- the necessary axial discharge generates a displacement of a mass of 18 g or a length of 8 mm.
- the axial discharge is therefore reduced from 50 to 18 g, ie a ratio reduced by 2.8.
- the quality of the thread makes it possible to abandon the 8g tolerance and to implement 5 to 6 g tolerances.
- FIG. 4 schematically shows an installation for preparing concrete rods to authorize the implementation of the method of the present invention.
- the installation firstly includes a zone for supplying the concrete reinforcing rod to be prepared.
- a vice 10 which will be able to tighten the concrete rod 1 and move it towards the installation.
- means 11 are provided for immobilizing the circle to be prepared. These means are for example constituted by a vice 11 of great length, in particular furnished with coating of the natural rubber or polyurethane type to avoid injuries to the concrete reinforcing bars.
- the clamps 10 and 11 are of the hydraulic type and displaceable horizontally relative to the longitudinal axis 22 of supply of the concrete rods.
- the different arrows in FIG. 4 simulate the operation of the system and in particular the following operation: the vice 10 clamps the concrete ring, the immobilization vice 11 opens, the vice 10 moves forward, the vice 11 tightens on the round, the vice 10 becomes free and moves back to prepare for a new cycle.
- a shear 12 In front of the immobilizing vice 11 are provided for sliding, a shear 12, means 13 for axially cold pressing the end rounds, as well as a unit of mechanical stress by compression of the threaded end of the round.
- the concrete reinforcing rod can be worked without having to change its positioning, this being locked once and for all in the vice 11.
- the installation has means 16, 17 for listening to the scope to be driven back and / or to be threaded. These means are provided for vertical and horizontal movement in order to be able to bring the peeling tool in the longitudinal axis 22 of the concrete rod to be worked.
- the installation comprises, in the same spirit, means 18 for carrying out a threading by rolling, that is to say that the unit 18 is able to be moved to be placed coaxially in the axis 22 blocked in the means 11.
- the installation also has a unit 19 for screwing and unscrewing a sleeve allowing the said constraint to be implemented in the tool 14.
- the main advantage of the installation of the present invention lies in the fact that all the operations are carried out without having to move the rebar or reposition it and thus avoid all the positioning and centering which would be compulsory for carrying out the various machining steps. .
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Adornments (AREA)
- Joining Of Building Structures In Genera (AREA)
- Pivots And Pivotal Connections (AREA)
Claims (5)
- Verfahren zur Herstellung einer mechanischen Verbindung von Außenrippen aufweisenden Bewehrungselementen, welches seine Anwendung insbesondere im Bereich des Betonbaus findet, bei welchem man wenigstens ein Bewehrungselement (1) mit einem anderen Bewehrungselement (2) oder mit einer Verankerungsstelle mittels einer mit Gewinde versehenen Verbindungsmuffe (3) verbindet, wobei das Bewehrungselement (1) einen nominellen Querschnitt Φ und wenigstens ein verstärktes Ende (4) aufweist, umfassend das Kaltstauchen des Endes (4) des zu verbindenden Bewehrungselements, um eine verstärkte Zone zu bilden, und das Herstellen eines Gewindes (9) an der verstärkten Zone (7), damit der Durchmesser d2 am Gewindegrund gleich oder größer dem nominellen Querschnitt Φ ist,
dadurch gekennzeichnet, daß es umfaßt:- das Schälen des Endes des Roh-Bewehrungselements, um die Außenrippen (6) zu entfernen,- das Kaltstauchen durch Ausüben eines Axialdrucks auf dieses Ende, um einen Durchmesser nahe dem Durchmesser d4 an den Gewindeflanken zu erhalten,- das Zurichten des gestauchten Bereichs, um es auf Maß zu bringen, und- das Herstellen des Gewindes durch Radialstauchen (8) mittels einer Rollformungstechnik. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Stauchungen (7,8) auf der Länge des Gewindes des Endes (4) durchgeführt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die erste Stauchung (7) mit einem Grad der Vergrößerung des Durchmessers des Endes nahe 15% durchführt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man nach der Herstellung des Gewindes am gestauchten Ende das mit Gewinde versehene Ende durch Kompression mechanisch belastet.
- Anlage zum Vorbereiten von Bewehrungselementen, um die Verwendung des Verfahrens nach einem der Ansprüche 1 bis 4 zu gestatten, umfassend Festhaltemittel (11) zum Festhalten des herzustellenden Bewehrungselements (1), Kaltstauchungsmittel (13) zum axialen Kaltstauchen eines Endes des Bewehrungselements und Gewindemittel (18) zum Herstellen eines Gewindes an diesem Ende,
dadurch gekennzeichnet,
daß sie Mittel (16,17) zum Schälen des zu stauchenden und/oder mit Gewinde zu versehenden Bereichs und Mittel (18) zum Herstellen eines Gewindes durch Rollen des Endes umfaßt, wobei die genannten Mittel, zum Schälen, zum Kaltstauchen und zum Herstellen eines Gewindes verlagerbar sind, um nacheinander koaxial zur Achse (22) des in den Festhaltemitteln (11) blockierten Bewehrungselements angeordnet zu werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9204187 | 1992-03-30 | ||
FR9204187A FR2689156B1 (fr) | 1992-03-30 | 1992-03-30 | Procede de realisation d'une liaison mecanique de ronds a beton, liaison obtenue par le procede, rond a beton autorisant la mise en óoeuvre du dit procede, et installation de preparation de ronds a beton. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0563490A1 EP0563490A1 (de) | 1993-10-06 |
EP0563490B1 true EP0563490B1 (de) | 1996-12-11 |
Family
ID=9428541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92440073A Expired - Lifetime EP0563490B1 (de) | 1992-03-30 | 1992-06-09 | Verfahren zur Realisierung mechanischer Betonstahlverbindungen, Verbindung nach diesem Verfahren, Betonstahl für dieses Verfahren und Einrichtung zur Bearbeitung der Betonstähle |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0563490B1 (de) |
AT (1) | ATE146247T1 (de) |
DE (1) | DE69215856T2 (de) |
DK (1) | DK0563490T3 (de) |
ES (1) | ES2098477T3 (de) |
FR (1) | FR2689156B1 (de) |
GR (1) | GR3022596T3 (de) |
HK (1) | HK1007585A1 (de) |
SG (1) | SG47933A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG112795A1 (en) * | 1998-03-31 | 2005-07-28 | Gyeng Ok Chung | Method of working connection end of deformed bar for reinforcing concrete, deformed bar worked by the method and structure of connecting deformed bar |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5776001A (en) | 1994-02-16 | 1998-07-07 | Ccl Systems Limited | Thread formation |
KR100248963B1 (ko) * | 1998-03-31 | 2000-03-15 | 정경옥 | 콘크리트 보강용 이형봉강의 연결부 구조와 그 연결부의 가공방법 |
DE59900345D1 (de) * | 1999-04-22 | 2001-11-29 | Ancotech Ag Dielsdorf | Verfahren zur Herstellung eines mit einem Aussengewinde versehenen Armierungsstabes |
CN104707923A (zh) * | 2015-03-17 | 2015-06-17 | 丰都县雷龙金属构件有限公司 | 一种新型钢筋拧紧连接机 |
DE202017104918U1 (de) * | 2017-08-16 | 2017-10-23 | Pfeifer Holding Gmbh & Co. Kg | Zugstab oder Druckstab mit korrosionsbeständigen Gewindeflanken |
CN108824702B (zh) * | 2018-07-25 | 2023-10-03 | 广东工业大学 | 一种大直径frp筋材端部连接结构和连接方法及其应用 |
WO2020183071A1 (fr) * | 2019-03-13 | 2020-09-17 | Bartec Group | Procédé de préparation d'une barre d'armature pour béton armé |
CN109989531A (zh) * | 2019-04-09 | 2019-07-09 | 长安大学 | 一种高强钢筋锚固装置及其实施方法 |
WO2023069008A1 (en) * | 2021-10-18 | 2023-04-27 | Angkasa Daehan Steel Pte. Ltd. | Method for working a thread on a reinforcing bar for reinforcement of concrete |
CN114645602B (zh) * | 2022-05-23 | 2022-08-05 | 河北易达钢筋连接技术有限公司 | 一种改进型装配式住宅用螺纹连接套筒装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1659264C3 (de) * | 1967-09-12 | 1975-08-21 | Wayss & Freytag Ag, 6000 Frankfurt | Verfahren zum Verbinden der Enden von gerippten Betonbewehrungsstäben |
FR2639054B2 (fr) * | 1988-02-03 | 1992-07-03 | Techniport Sa | Perfectionnements apportes a la liaison mecanique de ronds a beton, procede de realisation de telles liaisons et rond a beton obtenu par la mise en oeuvre dudit procede |
FR2653809B1 (fr) * | 1989-10-26 | 1995-05-12 | Techniport Sa | Installation de realisation de ronds a beton. |
DE69108969D1 (de) * | 1990-03-23 | 1995-05-24 | Mure Ets | Verbindung von Betonstäben, Verbindungsmuffe zum Gebrauch für diese Verbindung, und Verfahren für die Herstellung solcher Verbindung. |
-
1992
- 1992-03-30 FR FR9204187A patent/FR2689156B1/fr not_active Expired - Lifetime
- 1992-06-09 DE DE69215856T patent/DE69215856T2/de not_active Expired - Lifetime
- 1992-06-09 SG SG1996005452A patent/SG47933A1/en unknown
- 1992-06-09 AT AT92440073T patent/ATE146247T1/de active
- 1992-06-09 ES ES92440073T patent/ES2098477T3/es not_active Expired - Lifetime
- 1992-06-09 DK DK92440073.2T patent/DK0563490T3/da active
- 1992-06-09 EP EP92440073A patent/EP0563490B1/de not_active Expired - Lifetime
-
1997
- 1997-02-19 GR GR970400281T patent/GR3022596T3/el unknown
-
1998
- 1998-06-25 HK HK98106800A patent/HK1007585A1/xx not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG112795A1 (en) * | 1998-03-31 | 2005-07-28 | Gyeng Ok Chung | Method of working connection end of deformed bar for reinforcing concrete, deformed bar worked by the method and structure of connecting deformed bar |
Also Published As
Publication number | Publication date |
---|---|
ATE146247T1 (de) | 1996-12-15 |
DE69215856T2 (de) | 1997-06-05 |
DK0563490T3 (da) | 1997-06-02 |
ES2098477T3 (es) | 1997-05-01 |
FR2689156B1 (fr) | 1995-07-13 |
HK1007585A1 (en) | 1999-04-16 |
EP0563490A1 (de) | 1993-10-06 |
DE69215856D1 (de) | 1997-01-23 |
GR3022596T3 (en) | 1997-05-31 |
FR2689156A1 (fr) | 1993-10-01 |
SG47933A1 (en) | 1998-04-17 |
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