EP1058761A1 - Procede et dispositif pour appliquer des bandes de renforcement pretendues, resistant a la traction sur des constructions - Google Patents

Procede et dispositif pour appliquer des bandes de renforcement pretendues, resistant a la traction sur des constructions

Info

Publication number
EP1058761A1
EP1058761A1 EP99902497A EP99902497A EP1058761A1 EP 1058761 A1 EP1058761 A1 EP 1058761A1 EP 99902497 A EP99902497 A EP 99902497A EP 99902497 A EP99902497 A EP 99902497A EP 1058761 A1 EP1058761 A1 EP 1058761A1
Authority
EP
European Patent Office
Prior art keywords
band
adhesive
curved surfaces
hardened
section
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.)
Granted
Application number
EP99902497A
Other languages
German (de)
English (en)
Other versions
EP1058761B1 (fr
Inventor
Urs Meier
Iwan STÖCKLIN
Andreas WINISTÖRFER
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.)
Eidgenoessische Materialprufungs und Forschungsanstalt EMPA
EMPA
Original Assignee
Eidgenoessische Materialprufungs und Forschungsanstalt EMPA
EMPA
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 Eidgenoessische Materialprufungs und Forschungsanstalt EMPA, EMPA filed Critical Eidgenoessische Materialprufungs und Forschungsanstalt EMPA
Publication of EP1058761A1 publication Critical patent/EP1058761A1/fr
Application granted granted Critical
Publication of EP1058761B1 publication Critical patent/EP1058761B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
    • E04G2023/0255—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements whereby the fiber reinforced plastic elements are stressed
    • E04G2023/0259—Devices specifically adapted to stress the fiber reinforced plastic elements

Definitions

  • the present invention relates to a method and an apparatus for applying prestressed, tensile reinforcement tapes to structures that are glued to the structure by means of an adhesive.
  • Figure 1 a shows the tensioning mechanism of the device schematically, before tensioning the tensile band
  • Figure 1 b shows the tensioning mechanism of the device schematically, during the tensioning of the tensile band
  • Figure 2 shows the clamping mechanism of the device in detail, seen from the side
  • Figure 3 The entire device seen from the side with a prestressed reinforcement tape, mounted on the structure and shortly before the reinforcement tape is applied to the structure.
  • Figure 4a The entire device seen from the side when applying a discontinuously tensioned lamella, the two heating / pressing elements being moved from the center area towards the ends of the tensioning device;
  • FIG. 1a The basic principle of the device is shown in FIG. 1a. It consists of a rotatable curved surface 14, which is given here by the outer surface of the wheel 2, to which the reinforcing band to be prestressed, namely the fiber-reinforced plastic lamella 9, is fastened with one end. With the other end, the plastic lamella 9 can be anchored in a tensile manner in any manner, or in exactly the same way as shown here.
  • a holder 18 is attached to the curved surface 14, that is to say here on the outside of the wheel, to which the band 9 can be fastened by clamping by means of at least one screw 10.
  • the plastic lamella 9 is a band and is usually a few centimeters wide and about a millimeter thick.
  • the rotatable curved surface 14, that is to say the wheel 2 in the example shown, is connected to a lever 4 by means of which 6
  • Figure 1 b shows this part of the device when turning the wheel 2 by the lever 4 with the most tangential to the wheel 2 force F is applied.
  • This reinforces the reinforcement band 9 around the wheel 2, in the situation shown it is Already wrapped around the curved surface 14 by 270 °
  • the static friction of the belt 9 on the curved surface 14 is also influenced by the fact that a very high normal force is effective.Examinations have shown that a wrapping by only half the circumference, i.e. by 180 °, the effective tensile force at the end of the belt 9 is already reduced to a quarter in the belt direction.
  • the elements required to apply the preload force can be part of the clamping unit, or can also be used as add-on modules, so that they only work with Need to be mounted on the device and after The pre-tensioning can be removed again.
  • the tensioning unit with its tensioning mechanism is connected with its frame 12 via the fastening flange 8 to a connecting bracket 1.
  • the tensioning device is fastened to the structure 7 to be reinforced Via two fastening devices 3, which are connected to the tensioning device in terms of their height and can be locked and locked. This height is only set after the tensioning device has come into contact with the structure 7, so that a perfect connection and positioning can be established.
  • the fastening of the device must be designed as a longitudinally displaceable floating bearing on at least one side of the tensioning device in order to be able to accommodate possible length extensions of the tensioning device.
  • the device must not only allow the pretensioning of the band 9, but also its application to the structure 7 and hold in the pretensioned state until the adhesive has hardened.
  • a complete device required for this is shown in FIG. 3 seen from the side.
  • This device consists of a rigid steel or aluminum beam 1, an extruded or welded box girder, a framework or a wound fiber-reinforced plastic carrier, which is fastened between two clamping units 15, 16 explained above according to the principle and supports them against one another.
  • the curved surface 13 on one side is rotatable, while the opposite curved surface 14 may also be rotatable, but need not be rotatable.
  • the entire prestressing device here has at its ends the adjustable fastening devices 3, by means of which it can be provisionally fastened to the structure 7.
  • At least one of the fastening devices 3 is designed as a longitudinally displaceable floating bearing.
  • the coefficient of friction between the curved surfaces 13, 14 and the lamella 9 can be set in large areas and thus also the remaining prestressing force on the holder 18 (FIG. 1) of the lamella 9 after tensioning.
  • the two curved surfaces 13, 14 become rotated by hand or with a tool until the lamella 9 is wound up by a certain wrap angle and thus develops sufficient static friction on the two curved surfaces 13, 14, so that when the one surface 13 or 14 is turned further, the lamella 9 is preloaded is possible
  • the lever arm is temporarily in the ideal position with a B olzen 11 (Fig. 1) is locked and then the tensioning device is installed to apply the required pretensioning force.
  • This force can be applied hydraulically or pneumatically by a corresponding piston-zyhnder unit or by a spindle drive or simply by a screw If necessary, the clamping device is removed from the device again, unless the clamping device is part of the entire device and is firmly connected to it.
  • the rotatable curved surface 13, 14 is fixed with the fixing device 5, so that the preload force introduced is securely held on the preloaded device Slat 9, the adhesive is applied in the desired thickness and distribution at the appropriate points. Then the device with the slat 9 prestressed thereon is moved up to the structure 7.
  • the device is ver with a lifting device, advantageously with a hydraulic excavator rotatable gripper, brought with a crane or a hydraulic lifting platform to the previously pretreated concrete surface to be reinforced on the structure 7 and positioned on the structure so that the belt 9 runs at the desired location and there in the correct direction.
  • the device with the two height-adjustable fastening devices 3 provisionally fastened to the structure 7 9
  • the same device can also be used in a slightly modified form and procedure for reinforcing with discontinuously prestressed slats.
  • the slat attached to the structure does not have the same prestress over its entire length, but less or even no prestress at its ends, and at the desired locations, usually in the middle of the slat, but also at other points maximum preload.
  • This preload distribution is achieved in that the bond between the structure and the lamella is established locally in small areas and afterwards the preload of the lamella areas still to be glued is changed. In each area that has already been glued, the lamella has stored the pre-tension that prevailed during the production of the composite. 10
  • FIG 4a the device for applying a discontinuously tensioned lamella is shown.
  • the air cushion 6 is dispensed with.
  • two such heating / pressing elements 19 are present.
  • These heating / pressing elements 19 can either be moved by hand or better by motor over the entire length of the carrier.
  • they can be driven by an electric motor, for example, and can be moved along a rail and, for example, a rack on the carrier.
  • the heating / pressing elements 19 can also be pulled over the carrier 1 along a slide rail, for example, by means of an electric cable.
  • the lamella section just loaded by it can be heated and pressed against the building 7.
  • the heating of the corresponding slat section with the building is made or accelerated.
  • these heating / pressing elements 19 are moved outwards from the area of the center of the lamella 9. During this slow movement of the elements 19 towards the outside, the pretensioning force of the lamella 9 is reduced to the desired extent continuously or in discrete steps.
  • the slat 9 is finally firmly connected to the structure 7 over its entire length with different prestressing forces, so that the prestressing force is distributed over the entire slat length as desired.
  • An equal distribution of the biasing force in the lamella can also be achieved if only a single heating / pressing element 19 is used, as shown in Figure 4b.
  • this heating / pressing element 19 is moved from one end of the tensioning device to the other end.
  • the pretensioning of the lamella 9 is increased continuously or in steps up to the maximum value, starting from a minimum value, while simultaneously moving with the heating / pressing element 19, here from left to right, for example the heating / pressing element 19 the middle of the lamella 9 has reached. Then the preload is reduced to the desired minimum value while the heating 11
  • the current clamping force of the lamella 9 is applied and changed with precisely positionable and controllable hydraulic piston-cylinder units or spindle drives.
  • the exact preload is measured using strain gauges on the lamella or using a force measuring device built into the preloading device.
  • the heating / pressing elements 19 can be moved manually or advantageously automatically along the entire length of the clamping beam.
  • the pre-tensioned belts have to be attached to bridges at great heights using a crane or excavator, it is advantageous if the entire application can be carried out remotely. The same applies to cases where hollow structures have to be approached from the inside so that accessibility is restricted.
  • the two fasteners 3 of the pretensioning device must both be designed as longitudinally displaceable floating bearings in order to avoid a static indefiniteness of the fastening of the tensioning device with the structure.
  • Figure 4c shows an example of a possible course of the preload in the lamella 9.
  • the lamella 9 has at its ends a similarly sized minimum preload Fmin, which increases continuously towards the center of the lamella 9 to a maximum preloading force Fmax.
  • the course of the pretensioning force of the lamella 9 over its length can, however, be adapted depending on the application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Bridges Or Land Bridges (AREA)
  • Basic Packing Technique (AREA)

Abstract

Selon l'invention, pour renforcer un élément de construction (7) étendu en longueur ou plat, ayant des fonctions de support, de façon qu'il résiste aux forces de flexion auxquelles il est exposé, on peut utiliser des bandes de matière plastique (9) du type lamellaire, renforcée par fibres. Ces bandes sont normalement approchées extérieurement, et également depuis l'intérieur en cas de structure creuse, de la construction (7) et fixées par adhésif. Les lamelles (9) sont prétendues au moyen des unités de tension (15, 16) du dispositif de tension, traitées, à l'état prétendu, avec de l'adhésif, puis approchées des zones à renforcer avec le dispositif de tension. Le dispositif de tension est fixé provisoirement à la construction (7) avec des dispositifs de fixation (3) pouvant être déplacés, puis pressé contre ladite construction. En outre, la lamelle (9) est pressée contre la construction (7) avec de l'air comprimé, au moyen d'un sac à air (6) ou d'un tuyau à air, jusqu'à ce que l'adhésif ait durci.
EP99902497A 1998-02-26 1999-02-16 Procede et dispositif pour appliquer des bandes de renforcement pretendues, resistant a la traction sur des constructions Expired - Lifetime EP1058761B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH45498 1998-02-26
CH45498 1998-02-26
PCT/CH1999/000076 WO1999043909A1 (fr) 1998-02-26 1999-02-16 Procede et dispositif pour appliquer des bandes de renforcement pretendues, resistant a la traction sur des constructions

Publications (2)

Publication Number Publication Date
EP1058761A1 true EP1058761A1 (fr) 2000-12-13
EP1058761B1 EP1058761B1 (fr) 2003-08-27

Family

ID=4187397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99902497A Expired - Lifetime EP1058761B1 (fr) 1998-02-26 1999-02-16 Procede et dispositif pour appliquer des bandes de renforcement pretendues, resistant a la traction sur des constructions

Country Status (9)

Country Link
US (1) US6464811B1 (fr)
EP (1) EP1058761B1 (fr)
JP (1) JP2002505392A (fr)
AT (1) ATE248266T1 (fr)
AU (1) AU741986B2 (fr)
CA (1) CA2321896C (fr)
DE (1) DE59906771D1 (fr)
ES (1) ES2207930T3 (fr)
WO (1) WO1999043909A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6514371B2 (en) * 2000-03-13 2003-02-04 Louis K. Justin Method and apparatus for applying adhesive film to an article
DE10237968B3 (de) * 2002-08-20 2004-02-05 Leonhardt, Andrä und Partner Beratende Ingenieure VBI GmbH Verfahren zum Anbringen von Zuggliedern an Tragwerken sowie Vorrichtung zur Durchführung des Verfahrens
US7931699B2 (en) * 2002-12-27 2011-04-26 Hbi Branded Apparel Enterprises, Llc Compositions for spray dyeing cellulosic fabrics
US6835258B2 (en) * 2002-12-27 2004-12-28 Sara Lee Corporation Automated processes for the production of garments
US7931700B2 (en) * 2002-12-27 2011-04-26 Hbi Branded Apparel Enterprises, Llc Composition for dyeing of cellulosic fabric
EP1507048A1 (fr) * 2003-08-14 2005-02-16 Sika Technology AG Procédé de mise sous tension d'un matériau composite
EP2171169B1 (fr) * 2007-06-27 2014-07-30 Al-Emrani, Mohammad Procédé pour appliquer un matériel composite renforcé à un élément structurel
CH699945A2 (de) * 2008-11-17 2010-05-31 Josef Scherer Vorgespannte Schichtbrettholz- oder keilverzinkte Holz-Träger
US9322508B2 (en) * 2011-09-01 2016-04-26 University Of South Florida Systems and methods for applying reinforcement material to existing structures
KR20160102051A (ko) 2013-12-23 2016-08-26 텐록 테크놀로지스 아베 프리-스트레싱 장치 및 구조적 부재를 강화하기 위한 방법
RU173025U1 (ru) * 2017-04-24 2017-08-07 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Крепежно-натяжное устройство
CN110318558B (zh) * 2019-07-31 2023-06-06 南方工程检测修复技术研究院 一种预应力frp加固柱形结构的预应力施加装置及其施工方法
CZ309366B6 (cs) * 2020-03-18 2022-10-12 České vysoké učení technické v Praze Zařízení pro zpevňování povrchových a přípovrchových vrstev stavebních zděných konstrukcí, zejména historických
CN113047656B (zh) * 2021-03-26 2021-11-23 广州市胜特建筑科技开发有限公司 一种用于建筑结构修复加固领域的顶式预应力加固机
EP4276260A1 (fr) * 2022-05-10 2023-11-15 BBR VT International Ltd. Dispositif de précontrainte, post-tension ou fourniture d'une pression de confinement à une structure
CN116241097B (zh) * 2023-02-24 2024-02-02 水利部交通运输部国家能源局南京水利科学研究院 一种避免预应力frp布拉伸过程发生变形的均匀加固装置

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CH687399A5 (de) * 1992-04-06 1996-11-29 Eidgenoessische Materialpruefung Verfahren und Vorrichtung zur Schubverstaerkung an einem Bauwerkteil.
WO1994005499A1 (fr) * 1992-09-09 1994-03-17 Clock Spring Company L.P. Bandes de renforcement en materiau composite a resistance a la traction elevee et leurs procedes de fabrication
GB2277332A (en) * 1993-04-17 1994-10-26 Univ Sheffield Repair and reinforcement of load bearing members
ATE171240T1 (de) * 1995-01-09 1998-10-15 Empa Befestigung von verstärkungslamellen
EP0865554A1 (fr) * 1995-12-05 1998-09-23 Josef Scherer Composant de construction ou construction a structure composite, element de construction composite associe, et procede de fabrication
DE19742210A1 (de) * 1997-09-24 1999-03-25 Goehler Bernhard Dipl Ing Verfahren und bandförmiges Zugglied zur Ertüchtigung und/oder Sanierung von Stahlbeton- oder Spannbeton-Tragwerken sowie Vorrichtung zur Durchführung des Vefahrens

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Also Published As

Publication number Publication date
WO1999043909A1 (fr) 1999-09-02
ATE248266T1 (de) 2003-09-15
DE59906771D1 (de) 2003-10-02
AU741986B2 (en) 2001-12-13
ES2207930T3 (es) 2004-06-01
CA2321896C (fr) 2005-10-18
JP2002505392A (ja) 2002-02-19
EP1058761B1 (fr) 2003-08-27
US6464811B1 (en) 2002-10-15
CA2321896A1 (fr) 1999-09-02
AU2262499A (en) 1999-09-15

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