EP1058761B1 - 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 Download PDF

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Publication number
EP1058761B1
EP1058761B1 EP99902497A EP99902497A EP1058761B1 EP 1058761 B1 EP1058761 B1 EP 1058761B1 EP 99902497 A EP99902497 A EP 99902497A EP 99902497 A EP99902497 A EP 99902497A EP 1058761 B1 EP1058761 B1 EP 1058761B1
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EP
European Patent Office
Prior art keywords
strip
construction
curved surfaces
section
adhesive
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
Application number
EP99902497A
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German (de)
English (en)
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EP1058761A1 (fr
Inventor
Urs Meier
Iwan STÖCKLIN
Andreas WINISTÖRFER
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Eidgenoessische Materialprufungs und Forschungsanstalt EMPA
EMPA
Original Assignee
Eidgenoessische Materialprufungs und Forschungsanstalt EMPA
EMPA
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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
    • 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 Application of prestressed, tensile reinforcement tapes to buildings, which are glued to the building with an adhesive.
  • Another object of the invention is to disclose an apparatus for performing this method that is compact, is easy and safe to use, and is inexpensive to manufacture.
  • This object is achieved by a method for applying prestressed, tensile reinforcement tapes on structures, in which the applying tape pre-tensioned and pre-treated with adhesive on a building applied and glued there with this structure, and this is because distinguishes that the procedure is independent of anchor points on Structure for absorbing tensile forces is by the belt by means of a device, to which it can be stretched under tension to the building is approached and there successively with different sections Biasing by means of the device to the corresponding, pre-treated Place on the structure until the adhesive on each of these sections is cured.
  • the object is further achieved by a device according to Claim 6 for performing this method.
  • FIG. 1a The basic principle of the device is shown in FIG. 1a. It consists in a rotatable curved surface 14, which here by the outer surface of the Wheel 2 is given, on which the reinforcement band to be prestressed, namely the fiber-reinforced plastic lamella 9, attached at one end becomes. With the other end, the plastic lamella 9 can be of any type be anchored in a tension-resistant manner, or in exactly the same way as shown here. In the example shown is on the curved surface 14, so here on the Wheel outside, a bracket 18 attached to the band 9 by means of at least one screw 10 can be fastened by clamping.
  • the Plastic lamella 9 is a band and is usually a few inches wide and about a millimeter thick.
  • the rotatable curved surface 14, that is in example shown the wheel 2 is connected to a lever 4, by means of which Swiveling around the wheel axis, here clockwise in the picture, wheel 2 and thus the curved surface 14 is rotatable.
  • Figure 1b shows this part of the device when turning the wheel 2, by the lever 4 with the force F as tangential to the wheel 2 is applied.
  • the reinforcement band 9 is around the wheel 2 looped, in the situation shown it is already 270 ° around the curved Surface 14 looped. Due to the high traction, the static friction of the Band 9 on the curved surface 14 influenced by a very high Normal force is effective. Research showed that wrapping around only half the circumference, i.e. by 180 °, the effective tractive force at the end of the Volume 9 in the direction of the band already breaks down to a quarter. This realization is the basic idea behind the construction of the device and the Application methods.
  • FIG. 2 shows the actual clamping unit in an enlarged view.
  • the curved surface 14 is formed here by a wheel 2, which on a Frame 12 is rotatably mounted.
  • an adjustable Fastening device 3 available to the whole device on to temporarily reinforce building 7.
  • the lamella 9 or that Volume 9 was previously clamped and was here by twisting the curved surface 14 already at a wrap angle of 270 ° wound.
  • the lever arm 4 can be in discrete positions Wheel 2 can be locked on the frame 12.
  • a locking device 5 can the preload force is maintained.
  • the to apply the Preload force necessary elements can be part of the clamping unit, or can also be used as add-on modules, so that they can only be attached to the Device are assembled and disassembled after preloading become.
  • the clamping unit with its clamping mechanism is with its frame 12 connected via the mounting flange 8 with a connecting support 1
  • Attachment of the tensioning device to the structure 7 to be reinforced is done Via two fastening devices 3, the height of which can be moved and locked are connected to the clamping device. This amount is only after successful contact of the tensioning device with the structure 7, so that a perfect connection and positioning can be established.
  • On At least one side of the tensioning device must be attached to the Device to be designed as a longitudinally movable floating bearing, in order to eventual To be able to accommodate linear expansion of the clamping device.
  • the device does not only have to pretension the band 9 alone enable, but also its application to the structure 7 and holding in pre-stressed state until the adhesive has hardened.
  • a necessary for this whole device is shown in Figure 3 seen from the side.
  • This Device consists of a rigid steel or aluminum beam 1, one extruded or welded box girder, a truss or a wrapped fiber-reinforced plastic carrier between the top of the two Principle according to the explained clamping units 15, 16 and this against each other.
  • the curved surface 13 on one side is rotatable, while the opposite curved surface 14 may also be rotatable can, but does not have to be rotatable.
  • the entire pretensioner instructs here the ends of the adjustable fastening devices 3, by means of which they can be temporarily attached to building 7.
  • At least one of the Fastening devices 3 is designed as a longitudinally movable floating bearing.
  • Figure 3 shows the clamping device here immediately before Applying the tape 9 to the structure 7.
  • an air cushion 6 or an expandable one Air hose placed, with the air pressure one over the whole with the The structure in contact with the lamella surface generates a uniform contact pressure can be.
  • the device can initially with be loaded into a volume.
  • the tape or lamella 9 is initially tangential to the curved surface on the two wheels 2, for example on Floor device brought up and then with the brackets 18 (Fig. 1) and the associated clamping screws clamped on both surfaces 13, 14.
  • the brackets 18 (Fig. 1) By surface treatment of the curved surfaces 13, 14 or The coefficient of friction can be placed between suitable films between the curved surfaces 13, 14 and the lamella 9 in large Adjust ranges and thus also the remaining preload on the Bracket 18 (Fig. 1) of the slat 9 after tensioning.
  • the two curved ones Surfaces 13, 14 are turned by hand or with a tool until the slat 9 is wound up by a certain wrap angle and thus sufficient static friction on the two curved surfaces 13, 14 developed so that when one surface 13 or 14 is turned further, a Preloading the slat 9 is possible.
  • the lever arm will be in the ideal position temporarily locked with a bolt 11 (Fig. 1) and then the Tensioning device installed to apply the required preload.
  • This Power can be hydraulic or pneumatic through an appropriate piston-cylinder unit or by a spindle drive or simply by a screw be applied. After the prestressing force has been applied, it becomes If necessary, the clamping device is dismantled from the device again because that the clamping device is part of the whole device and firmly with it connected is.
  • the rotatable curved surface 13,14 with the Locking device 5 determined so that the preload force is secure is held.
  • the adhesive is applied in the desired thickness and distribution.
  • the device with the slat 9 prestressed thereon to the structure 7 moved up.
  • the device with a hoist advantageously with a hydraulic excavator with a rotatable grab, with a crane or a hydraulic lift to the previously pretreated one to be reinforced Concrete surface brought up to building 7 and thus positioned on the building, that the tape 9 at the desired location and there in the right direction runs.
  • the device with the two height-adjustable fastening devices 3 provisionally attached to structure 7.
  • the fasteners 3 are then adjusted so that the lamella 9 is full on the building is applied.
  • the air cushion 6 or the device belonging to the device Air hose pressurized with compressed air, so that the lamella 9 in its entirety Support area, where it should be glued to the building 7, evenly the building 7 is pressed.
  • the lamella 9 is therefore pre-stressed Condition pressed against the building 7 until the adhesive has completely hardened. If necessary, the tension in the lamella 9 can be glued to it Strain gauges can be measured. With larger fluctuations during the Hardening time, caused by the temperature changes between day and Night, can be by means of a heater in the carrier of the pretensioner Temperature can be regulated to compensate for the temperature change and thus avoid dilatation.
  • the end anchorages of the slat 9 are attached and only now the pretensioning force is slow on at least one side of the device reduced and the device relieved.
  • the slat 9 is now at the ends of the Severed glue spots.
  • the same device can be in slightly modified form and Procedure also for reinforcement with discontinuously prestressed Slats are used.
  • the one attached to the structure Lamella not the same pretension over its entire length, but on their Ends less or no tension at all, and at the desired places, mostly in the middle of the slat, but also at other Set the maximum preload.
  • the device for applying a discontinuous tensioned slat shown.
  • the air cushion 6 is dispensed with.
  • Between the Carrier 1 and the tensioned lamella 9 are there for at least one in Longitudinal direction of the device movable heating / pressing element 19.
  • This Heating / pressing elements 19 are either by hand or better by motor the entire length of the carrier is mobile. You can do this, for example, with a Be electric motor driven, and along a rail and for example one Rack on the carrier to be mobile.
  • the heating / pressing elements 19 can for example by means of an electric cable along a slide rail are pulled over the carrier 1. They have electrical heating means and are advantageously remotely controlled with regard to the heating and its drive.
  • each element 19 can the lamella section just acted upon by it heated and pressed against the building 7. Because of the warming the composite of the corresponding slat section with the building or accelerated.
  • These heating / pressing elements 19 are shown in the Example moved outwards from the area of the center of the lamella 9. While this slow movement of the elements 19 towards the outside becomes the pretensioning force the slat 9 in the desired mass continuously or in discrete Steps reduced. The slat 9 is thus finally along its entire length different prestressing forces firmly connected to the structure 7, so that the pretensioning force is distributed over the entire length of the slats as required.
  • An equal distribution of the preload 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 from one end of the jig is moved to the other end.
  • the preload starting from a minimum value the lamella 9 becomes continuous or in Increments up to the maximum value while simultaneously with the heating / pressing element 19 is driven, here from left to right, for example the heating / pressing element 19 has reached the center of the lamella 9. Then the The preload is reduced to the desired minimum value while the heating / pressing element 19 simultaneously in the picture to the right to the other end of the Slat 9 is driven.
  • the current clamping force of the lamella 9 is precisely positionable and controllable hydraulic piston-cylinder units or spindle drives upset and changed.
  • the exact preload is measured using strain gauges on the slat or by a built in the pretensioner Force measuring device measured.
  • the heating / pressing elements 19 can by By hand or with advantage automatically along the entire length of the clamping beam be moved.
  • the pre-tensioned belts are at great heights it must be attached to bridges by means of a crane or excavator advantageous if the whole application can be done remotely.
  • the two fastenings 3 of the Preload device both to be designed as a longitudinally movable floating bearing a static indeterminacy of the fastening of the clamping device with the Avoid building.
  • FIG. 4c shows an example of a possible course of the preload in the lamella 9.
  • the lamella 9 has the same size at its ends Minimum preload Fmin on that towards the center of the lamella 9 in continuous increases to a maximum preload force Fmax.
  • the course of the preload the slat 9 over its length can, however, be adapted depending on the application become.

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  • 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)

Claims (9)

  1. Procédé pour appliquer des bandes de renforcement (9) sur des ouvrages ou constructions (7), ces bandes étant tendues initialement et résistant bien à la traction, dans lequel la bande (9) à appliquer est tendue initialement, traitée préalablement avec de la colle, puis appliquée sur un ouvrage et collée à cette structure, caractérisé en ce que le procédé est indépendant de points d'ancrages sur l'ouvrage pour l'absorption de forces de tension, en ce que la bande (9) aborde l'ouvrage au moyen d'un dispositif sur lequel elle peut être tendue sous une tension initiale et qu'au moyen du dispositif elle est pressée sur l'ouvrage successivement et tronçon par tronçon, avec des tensions initiales différentes, à l'endroit correspondant traité préalablement sur l'ouvrage (7), jusqu'à ce que la colle soit durcie sur chacun de ces tronçons.
  2. Procédé suivant la revendication 1, caractérisé en ce que la bande (9) est pressée sur l'ouvrage (7) localement et avec une tension initiale continuellement changée, jusqu'à ce que la colle soit durcie à cet endroit local.
  3. Procédé suivant la revendication 1, caractérisé en ce que
    a. la bande (9) à appliquer est étirée à ses deux extrémités, chacune étant fixée autour d'une surface convexe courbée (13, 14) sur un dispositif ;
    b. la bande à appliquer (9) est tendue initialement sur le pourtour par la rotation d'au moins une des surfaces courbées (13, 14);
    c. le tronçon de bande à appliquer (9) est encollé sur son côté faisant face à l'ouvrage (7);
    d. le tronçon de bande (9) à appliquer, maintenant tendu initialement, est amené avec le dispositif jusqu'à l'endroit de l'ouvrage (7) traité préalablement qui doit être renforcé, et le dispositif est fixé à cet endroit de manière provisoirement amovible au moyen de dispositifs de fixation réglables (3);
    e. le dispositif est pressé sur l'ouvrage (7) au moyen des dispositifs de fixation réglables (3), jusqu'à ce que les surfaces courbées (13, 14) soient pressées sur l'ouvrage aux endroits où la bande (9) les quitte tangentiellement;
    f. le tronçon de bande (9) dans la zone entre les surfaces courbées (2) est pressé sur l'ouvrage avec des moyens auxiliaires localement, tronçon par tronçon ou sur toute la surface de tronçon, jusqu'à ce que la colle soit durcie, cependant que la tension initiale est changée le cas échéant pour différents endroits ou tronçons;
    g. on supprime la tension initiale de la bande (9) en tournant dans le sens contraire au moins une des surfaces courbées (2) et le tronçon de bande (9) collé est séparé du dispositif;
    h. on éloigne de l'ouvrage (7) le dispositif.
  4. Procédé suivant la revendication 3, caractérisé en ce qu'après les étapes a. à e.:
    f. le tronçon de bande (9) dans la zone entre les deux surfaces courbées (13, 14) est pressé sur l'ouvrage (7) au moyen d'un coussin pneumatique (6) gonflable, actif entre le dispositif et la bande (9) tendue sur lui, jusqu'à ce que la colle soit durcie, cependant que le coussin pneumatique est délesté après le durcissement de la colle par évacuation de l'air comprimé;
    ensuite viennent les étapes g. à h.
  5. Procédé suivant la revendication 3, caractérisé en ce qu'après les étapes a. à e.:
    f. le tronçon de bande (9) dans la zone entre les deux surfaces courbées (13, 14) est chauffé au moyen d'au moins un élément de chauffage et de pression (19) sur toute la longueur du tronçon de bande continuellement ou en pas discrets, à un endroit local ou sur une partie du tronçon de bande et il est de la même façon pressé sur l'ouvrage (7), jusqu'à ce que la colle soit durcie à cet endroit ou sur cette partie du tronçon de bande ;
    ensuite viennent les étapes g. à h.
  6. Dispositif destiné à la réalisation du procédé pour appliquer sur des ouvrages (7) des bandes de renforcement résistant bien à la traction, suivant la revendication 1, caractérisé en ce qu'il est prévu un support (1), aux extrémités duquel sont disposées des surfaces (13, 14), espacées l'une de l'autre de manière résistant bien à la pression et à la flexion, courbées de manière convexe et orientées vers l'extérieur par rapport au support (1), ces surfaces comportant des fixations (18) pour fixer au moins une bande (9) placée sur la surface (13, 14) sur le pourtour, cependant que le support (1) est conçu de sorte que les deux surfaces courbées (13, 14) peuvent être reliées tangentiellement par un tronçon de bande (9), au moins une des surfaces courbées (13, 14) pouvant être tournée sur le pourtour et fixée dans chaque position de rotation, le dispositif comprenant par ailleurs des moyens permettant de le détacher de l'ouvrage (7).
  7. Dispositif suivant la revendication 6, caractérisé en ce que les surfaces courbées (13, 14) sont formées par deux roues (2), logées sur un support (1), placé entre deux, cependant qu'il existe des moyens d'entraínement mécaniques, hydrauliques ou pneumatiques, permettant de faire tourner au moins une des roues (2) et de la bloquer dans la position de rotation au moyen d'un dispositif de blocage (5).
  8. Dispositif suivant une des revendications 6 à 7, caractérisé en ce que le support (1) occupe l'espace entre les deux surfaces courbées (13, 14), cependant qu'à l'endroit où la bande (9) peut être serrée il forme une surface plane (17) dressée contre la bande, sur laquelle est disposé un coussin pneumatique (6) gonflable, au moyen duquel une bande (9) serrée entre les surfaces courbées (13, 14) peut, vue depuis le support (1), être pressée vers l'extérieur.
  9. Dispositif suivant une des revendications 6 à 7, caractérisé en ce que le support (1) occupe l'espace entre les deux surfaces courbées (13, 14), cependant qu'à l'endroit où la bande (9) peut être serrée il comporte au moins un élément de chauffage et de pression (19), actionné par un moteur ou à la main, se déplaçant sur la longueur de la bande (9) serrée entre les surfaces courbées (13, 14) et au moyen duquel la bande serrée (9) peut être chauffée localement ou tronçon par tronçon et pressée sur l'ouvrage (7).
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 EP1058761A1 (fr) 2000-12-13
EP1058761B1 true EP1058761B1 (fr) 2003-08-27

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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)

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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
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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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ES2122696T3 (es) * 1995-01-09 1998-12-16 Empa Sujecion de laminas de refuerzo.
US6269599B1 (en) * 1995-12-05 2001-08-07 Josef Scherer Construction component or construction with a composite structure, associated composite construction element, and method of production
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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CA2321896C (fr) 2005-10-18
DE59906771D1 (de) 2003-10-02
WO1999043909A1 (fr) 1999-09-02
US6464811B1 (en) 2002-10-15
AU2262499A (en) 1999-09-15
CA2321896A1 (fr) 1999-09-02
ATE248266T1 (de) 2003-09-15
JP2002505392A (ja) 2002-02-19
ES2207930T3 (es) 2004-06-01
AU741986B2 (en) 2001-12-13
EP1058761A1 (fr) 2000-12-13

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