WO2004003316A1 - Dispositif et procede de renforcement de structures porteuses - Google Patents

Dispositif et procede de renforcement de structures porteuses Download PDF

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Publication number
WO2004003316A1
WO2004003316A1 PCT/CH2003/000414 CH0300414W WO2004003316A1 WO 2004003316 A1 WO2004003316 A1 WO 2004003316A1 CH 0300414 W CH0300414 W CH 0300414W WO 2004003316 A1 WO2004003316 A1 WO 2004003316A1
Authority
WO
WIPO (PCT)
Prior art keywords
cfrp
lamella
cfrp lamella
end element
sleeve
Prior art date
Application number
PCT/CH2003/000414
Other languages
German (de)
English (en)
Inventor
Gregor Schwegler
Original Assignee
Sika Technology Ag
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 Sika Technology Ag filed Critical Sika Technology Ag
Priority to CA002490947A priority Critical patent/CA2490947A1/fr
Priority to NZ537872A priority patent/NZ537872A/en
Priority to US10/519,074 priority patent/US20060196146A1/en
Priority to EP03729772A priority patent/EP1525360A1/fr
Priority to JP2004516405A priority patent/JP2005530942A/ja
Priority to AU2003240356A priority patent/AU2003240356A1/en
Publication of WO2004003316A1 publication Critical patent/WO2004003316A1/fr
Priority to US12/285,412 priority patent/US20090044483A1/en

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
    • E04C5/12—Anchoring devices
    • E04C5/127—The tensile members being made of fiber reinforced plastics
    • 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
    • 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
    • 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
    • E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
    • 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
    • E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off

Definitions

  • the invention relates to a device for reinforcing support structures and to a corresponding method according to claim 10.
  • Such support structures can be bridges, conventionally constructed walls made of brick or, for example, reinforced concrete walls or beams, wooden, plastic or steel beams.
  • CFRP slats of this type are glued to the carrier without pretensioning, ie slack.
  • the idea has now arisen of gluing them to the carrier in a prestressed manner.
  • concrete beams which uses CFRP slats, these being separated at the ends and glued, wedged or held in place by friction in the holding slots of the end elements.
  • the end elements are glued on the tension side of the support element, wedged or held by friction, or let into a corresponding recess in the support element with or without pretension.
  • CFRP lamella has to be pre-assembled in the factory or cut to length in the factory.
  • splitting the slat is a delicate process that requires precision work.
  • the object of the present invention is to propose a device for reinforcing support structures which is space-saving and is particularly suitable for on-site assembly, i.e. on the construction site, with or without pre-tensioning, whereby it is quick and uncritical. Another task is to specify a corresponding procedure for this.
  • FIG. 1 Schematic representation of an inventive device
  • Fig. 1 shows the schematic representation of a device according to the invention with CFRP lamella and end elements.
  • a support structure 1 has two recesses 2, 2 'on the upper side, which are provided for receiving the end elements 3, 3'.
  • a CFRP lamella 4 spans the supporting structure 1 and is pressed into the end elements 3, 3 '.
  • the recesses 2, 2 ' are usually milled into the supporting structure, respectively. drilled and usually have a cylindrical shape. Such an arrangement of the end elements saves space and proves to be particularly advantageous.
  • the CFRP lamella 4 can be at least partially or at least partially connected to the supporting structure by means of an adhesive layer. . ⁇
  • Fig. 2 shows a termination element according to the invention before driving the wedges, shown in section.
  • the CFRP lamella 4 lies centrally in a sleeve 5 and is held in the middle by wedges 6, 6 '.
  • the wedges protruding over the wider sleeve end are shown in position before driving.
  • the necessary transverse pressure is built up on the CFRP lamella so that it remains firmly in place in the sleeve (frictional connection).
  • the device according to the invention can be used with or without pretensioning, which is why the terminating element 3 is also referred to as an anchor head or clamping head.
  • the sleeve 5 consists of plastic, in particular of a fiber-reinforced plastic, of steel or another high-strength material. It is conical at least on the inside and has an essentially circular, an elliptical or an essentially square or rectangular inner cross section.
  • the outside of the sleeve can be independent of the inside can be chosen arbitrarily, namely, for example, cylindrical, but preferably also conical.
  • the wedges 6, 6 ' are made of plastic, in particular of a fiber-reinforced plastic, of steel or another high-strength material, ceramic or aluminum, of mortar, concrete or potting compound. In the simplest case, they consist of two identical wedges. However, a division of the same is also conceivable, e.g. with a division into 2 x 2 wedges, two come to rest on the top and two on the bottom of the CFRP lamella. A non-symmetrical division into approximately two and three wedges is also conceivable.
  • a single wedge can also be driven in if the CFRP lamella is held in the middle by a corresponding counterpart that is already firmly connected to the sleeve.
  • a first of two wedges can, for example, be held in the sleeve in the end position with a pressure sensitive adhesive, after which a single second wedge is driven in.
  • This arrangement has the advantage of providing the necessary pretension with only one-sided accessibility with a corresponding pretensioning device. This already shows a significant advantage of the device according to the invention.
  • the means for promoting adhesion 7 consist of an adhesive, a friction agent, such as a grain size of 0.1-1.0 mm, a film provided with a friction agent, a powder coating or a plasma coating and the like. They form a so-called ⁇ aft Georgia 'between the CFRP lamella 4 and the wedges 6, 6'.
  • the means for imparting adhesion 7 are not necessarily located exclusively on the CFRP lamella. Rather, they can also be arranged on the inside of the sleeve, specifically over the entire surface, partially, in the direction of the traction, or they are arranged spirally to the direction of traction. It is essential that the friction parameter between the CFRP lamella and the wedges and, if necessary, also to the sleeve becomes large and that the required transverse pressure from the pressing in of the wedges is permanently present.
  • Fig. 3 shows an embodiment of a termination element before pressing the sleeve onto wedges and CFRP lamella shown in section.
  • the conical sleeve 5 has an outside diameter of 50 mm and 65 mm. It has an oval cross-section and is 110 mm long and 6.0 mm thick. It consists of a carbon fiber composite (CFRP).
  • CFRP lamella 4 has a cross section of 2.4 x 60 mm and is a plastic reinforced with carbon fibers (Sika CARBODUR, Sika AG, CH-8048 Zurich).
  • An aging-resistant sandpaper coated on both sides was attached to the CFRP lamella 4 in the area of the sleeve as a means of imparting adhesion 7.
  • An adhesion promoter was dispensed with here between the wedges 6, 6 'and the sleeve 5.
  • the two wedges 6, 6 ' are also made of a carbon fiber reinforced plastic (CFRP).
  • the wedges were driven or pressed into the sleeve with a force of 200 kN. Such a clamping head or such an end element withstands test forces of at least 300 kN.
  • this exemplary embodiment represents an alternative method in which the sleeve is pressed onto the wedges and the CFRP lamella, which will be described later.
  • the pressing direction is indicated with the arrows on the sleeve 5.
  • CFRP slats are to be delivered to the construction site on rolls, cut to length and tensioned and anchored without splitting the slat ends.
  • recesses 2, 2 'or cutouts are made in the supporting structure 1; i.e. these are excavated, milled, drilled, etc.
  • the so-called' supports' of a known type are now introduced or inserted, which serve as force introduction elements, and which are positioned exactly there.
  • the CFRP lamella 4 is threaded or pulled in introduced and positioned, in sequence through the first recess 2 and the first support, through the first closure element 3, around the support structure 1, through the second recess 2 'and the second support, through the second closure element 3' until the CFRP lamella 4 dominates this.
  • CFRP slats are usually delivered to the construction site on rolls and are pulled off there from a trestle. At most, prefabricated CFRP lamellas in a U-shape are used.
  • the means for imparting adhesion 7 are applied to the CFRP lamella, specifically in the area of the end elements 3, 3.
  • a fourth step the at least one wedge 6 'of the second end element 3' is pressed into the second sleeve 5 '. this being done without pulling on the CFRP lamella 4.
  • the CFRP lamella is then prestressed, which is done with a prestressing device located above the first end element 3.
  • a simultaneous tensioning at both ends of the CFRP lamella is also possible, with a pretensioner being located above the two end elements 3, 3 '. Biasing can also be completely omitted.
  • the at least one wedge 6 of the first end element 3 is driven in or pressed in.
  • the CFRP lamella is then separated off above the first end element 3. This concludes the procedure for reinforcing the support structure.
  • the CKF lamella 4 which is arranged around the tension side of the support structure 1 to be reinforced, can be at least partially glued to it.
  • the second sleeve 5 ' is pressed onto the at least one wedge 6' of the second end element 3 'and the CFRP lamella, this without Pull on the CFRP lamella 4.
  • the CFRP lamella is then prestressed, which is done with a prestressing device located above the first end element 3. This bias can also be omitted.
  • the first sleeve 5 is pressed onto the at least one wedge 6 of the first end element 3 with the CFRP lamella.
  • the CFRP lamella is then separated off above the first end element 3. This concludes this alternative method for strengthening the support structure.
  • the CFRP lamella 4 is pretensioned or 10-20% spanned, the at least one wedge 6, 6 'being loosely inserted in the sleeve but not yet pressed in. Any adhesives or holding devices ' keep the wedges stable in this position.
  • the pretension is now partially relaxed, with the at least one wedge 6, 6 ′ being drawn in or pressed into the sleeve 5 in a self-wedging manner.
  • the preload that is ultimately necessary is maintained.
  • the CFRP lamella 4 is then separated over the first end element 3. This concludes this further alternative method for reinforcing the support structure.
  • Devices according to the invention are particularly suitable for the renovation of concrete supporting structures, such as ceilings or bridge girders. Furthermore, they can also be used for all known applications of conventional CFRP slats, such as masonry, wooden structures, steel structures and earthquake reinforcements.
  • the easy preloading enables the strength properties of the CFRP slats to be used to a greater extent.
  • the pre-tensioning causes a pre-pressing to take place on the tension side of an existing support element, which is particularly advantageous for bridge girders, for example.
  • the method is characterized by a high level of economy and rapid assembly, and the device is characterized by a high degree of flexibility in the arrangement on the supporting structures to be reinforced.

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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)
  • Bridges Or Land Bridges (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

L'invention concerne un dispositif comportant une lamelle CFK (4) destinée à renforcer des structures porteuses (1) et aboutissant dans un élément terminal (3, 3'), les extrémités de la lamelle CFK (4) étant pourvues d'éléments adhésifs (7) ou d'un pont adhésif. La lamelle CFK (4) est comprimée par une cale respective (6, 6') dans les éléments terminaux (3, 3'). Les éléments adhésifs (7)se présentent sous la forme de colles, d'un élément de friction présentant un grain de 0,1 à 1,0 mm, d'une pellicule pourvue d'un élément de friction, d'un revêtement pulvérulent ou d'un revêtement plasma. L'invention concerne également des procédés de renforcement de structures porteuses faisant intervenir le dispositif selon l'invention, avec ou sans précontrainte. Le dispositif selon l'invention se caractérise par une grande flexibilité de montage sur les structures porteuses devant être renforcées, et le procédé selon l'invention se caractérise par son coût réduit et la vitesse de montage.
PCT/CH2003/000414 2002-06-26 2003-06-25 Dispositif et procede de renforcement de structures porteuses WO2004003316A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA002490947A CA2490947A1 (fr) 2002-06-26 2003-06-25 Dispositif et procede de renforcement de structures porteuses
NZ537872A NZ537872A (en) 2002-06-26 2003-06-25 Device and method for the reinforcing of support structures
US10/519,074 US20060196146A1 (en) 2002-06-26 2003-06-25 Device and method for reinforcing of support structures
EP03729772A EP1525360A1 (fr) 2002-06-26 2003-06-25 Dispositif et procede de renforcement de structures porteuses
JP2004516405A JP2005530942A (ja) 2002-06-26 2003-06-25 支持構造体を補強する装置及び方法
AU2003240356A AU2003240356A1 (en) 2002-06-26 2003-06-25 Device and method for the reinforcing of support structures
US12/285,412 US20090044483A1 (en) 2002-06-26 2008-10-03 Device and process for reinforcing bearing structures

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH11012002 2002-06-26
CH1101/02 2002-06-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/285,412 Continuation US20090044483A1 (en) 2002-06-26 2008-10-03 Device and process for reinforcing bearing structures

Publications (1)

Publication Number Publication Date
WO2004003316A1 true WO2004003316A1 (fr) 2004-01-08

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ID=29783972

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2003/000414 WO2004003316A1 (fr) 2002-06-26 2003-06-25 Dispositif et procede de renforcement de structures porteuses

Country Status (10)

Country Link
US (2) US20060196146A1 (fr)
EP (1) EP1525360A1 (fr)
JP (2) JP2005530942A (fr)
KR (1) KR20050027097A (fr)
CN (1) CN1662718A (fr)
AU (1) AU2003240356A1 (fr)
CA (1) CA2490947A1 (fr)
NZ (1) NZ537872A (fr)
RU (1) RU2005101760A (fr)
WO (1) WO2004003316A1 (fr)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
DE102004033015A1 (de) * 2003-07-23 2005-03-10 Sacac Schleuderbetonwerk Ag Le Klemm- und Spannhalterung für den temporären Einsatz an CFK-Verstärkungsstäben mit kreisrundem Querschnitt sowie zugehörige CFK-Verstärkungsstäbe
EP2420622A1 (fr) 2010-08-18 2012-02-22 Sika Technology AG Dispositif d'introduction de force dans des éléments de traction à partir de lamelles de bandes plates en matière synthétique renforcées en fibres
EP2631392A1 (fr) * 2012-02-21 2013-08-28 Sika Technology AG Dispositif d'introduction de force dans des éléments de traction à partir de lamelles de bandes plates en matière synthétique renforcées en fibres
CN103628697A (zh) * 2013-11-22 2014-03-12 广西科技大学 光纤光栅纤维增强复合材料拉挤连续成型智能板及其制备方法
EP2241699A3 (fr) * 2009-04-07 2016-02-17 Thomas Friedrich Douille d'ancrage pour l'ancrage d'éléments d'armature prétendus

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US7640712B1 (en) * 2006-08-30 2010-01-05 The Woodstone Company Window glazing assembly having a carbon fiber insert member
US9322508B2 (en) 2011-09-01 2016-04-26 University Of South Florida Systems and methods for applying reinforcement material to existing structures
JP5236108B1 (ja) 2011-12-21 2013-07-17 株式会社富士ボルト製作所 圧着構造の形成方法
JP6043942B2 (ja) * 2011-12-21 2016-12-14 株式会社富士ボルト製作所 圧着構造の形成方法
US11236508B2 (en) * 2018-12-12 2022-02-01 Structural Technologies Ip, Llc Fiber reinforced composite cord for repair of concrete end members
CN113863707B (zh) * 2021-10-08 2022-09-30 合肥双诺建筑结构工程有限公司 一种采用碳纤维布加固的钢筋混凝土梁及加固方法
CN114753669B (zh) * 2022-04-27 2023-04-21 华中科技大学 一种组合式frp抗剪加固装置及其应用
TWI824956B (zh) * 2023-03-25 2023-12-01 安能複材科技股份有限公司 斜塊式之預應力纖維板結構
TWI817912B (zh) * 2023-03-25 2023-10-01 安能複材科技股份有限公司 預應力纖維板結構及施工方法

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US6082063A (en) * 1996-11-21 2000-07-04 University Technologies International Inc. Prestressing anchorage system for fiber reinforced plastic tendons
EP1016767A1 (fr) * 1997-09-16 2000-07-05 Nippon Steel Corporation Structure de renfort d'elements de beton et procede associe
EP1186730A1 (fr) * 1997-12-02 2002-03-13 Sika AG, vorm. Kaspar Winkler & Co. Elément de renforcement pour composants de support de charge ou de transmission de charge, ainsi que procédé pour sa fixation sur une surface de composant

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004033015A1 (de) * 2003-07-23 2005-03-10 Sacac Schleuderbetonwerk Ag Le Klemm- und Spannhalterung für den temporären Einsatz an CFK-Verstärkungsstäben mit kreisrundem Querschnitt sowie zugehörige CFK-Verstärkungsstäbe
DE102004033015B4 (de) * 2003-07-23 2019-12-12 Carbo Link Gmbh Klemm- und Spannhalterung für den temporären Einsatz an CFK-Verstärkungsstäben mit kreisrundem Querschnitt sowie zugehörige CFK-Verstärkungsstäbe
EP2241699A3 (fr) * 2009-04-07 2016-02-17 Thomas Friedrich Douille d'ancrage pour l'ancrage d'éléments d'armature prétendus
EP2420622A1 (fr) 2010-08-18 2012-02-22 Sika Technology AG Dispositif d'introduction de force dans des éléments de traction à partir de lamelles de bandes plates en matière synthétique renforcées en fibres
WO2012022783A1 (fr) 2010-08-18 2012-02-23 Sika Technology Ag Dispositif d'induction de force dans des éléments de traction constitués de lamelles plates en matière plastique renforcée par des fibres
RU2612390C2 (ru) * 2010-08-18 2017-03-09 Сикэ Текнолоджи Аг Устройство для создания преднапряжения в стяжных элементах, выполненных из армированных волокном пластиковых плоских полосовых пластин
US9663963B2 (en) 2010-08-18 2017-05-30 Sika Technology Ag Device for introducing a force into tension members made of fiber-reinforced plastic flat strip lamellas
AU2016204282B2 (en) * 2010-08-18 2017-12-14 Sika Technology Ag Device For Introducing A Force Into Tension Members Made Of Fiber-Reinforced Plastic Flat Strip Lamella
EP2631392A1 (fr) * 2012-02-21 2013-08-28 Sika Technology AG Dispositif d'introduction de force dans des éléments de traction à partir de lamelles de bandes plates en matière synthétique renforcées en fibres
WO2013124304A1 (fr) * 2012-02-21 2013-08-29 Sika Technology Ag Dispositif pour l'application d'une force dans un élément de traction formé de lamelles de bande plate en matière plastique renforcée par des fibres
CN103628697A (zh) * 2013-11-22 2014-03-12 广西科技大学 光纤光栅纤维增强复合材料拉挤连续成型智能板及其制备方法
CN103628697B (zh) * 2013-11-22 2016-06-29 广西科技大学 光纤光栅纤维增强复合材料拉挤连续成型智能板

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CN1662718A (zh) 2005-08-31
EP1525360A1 (fr) 2005-04-27
CA2490947A1 (fr) 2004-01-08
JP2009108675A (ja) 2009-05-21
US20090044483A1 (en) 2009-02-19
NZ537872A (en) 2007-01-26
JP2005530942A (ja) 2005-10-13
US20060196146A1 (en) 2006-09-07
KR20050027097A (ko) 2005-03-17
RU2005101760A (ru) 2005-10-27

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