EP0560362A2 - Faserverstärkte Kunststoffbewehrung für Beton - Google Patents

Faserverstärkte Kunststoffbewehrung für Beton Download PDF

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Publication number
EP0560362A2
EP0560362A2 EP19930103946 EP93103946A EP0560362A2 EP 0560362 A2 EP0560362 A2 EP 0560362A2 EP 19930103946 EP19930103946 EP 19930103946 EP 93103946 A EP93103946 A EP 93103946A EP 0560362 A2 EP0560362 A2 EP 0560362A2
Authority
EP
European Patent Office
Prior art keywords
reinforcement
core
reinforced plastic
fiber reinforced
set forth
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.)
Ceased
Application number
EP19930103946
Other languages
English (en)
French (fr)
Other versions
EP0560362A3 (de
Inventor
Nobuyuki C/O Komatsu Plastics Industry Co. Ozawa
Junji Hosokawa
Masao Kikuchi
Tokitaro c/o Mitsubishi Kasei Co. Hoshijima
Kinsuke c/o Mitsubishi Kasei Co. Yagi
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.)
Komatsu Plastics Industry Co Ltd
Mitsubishi Chemical Corp
Original Assignee
Komatsu Plastics Industry Co Ltd
Mitsubishi Chemical Corp
Mitsubishi Kasei Corp
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 Komatsu Plastics Industry Co Ltd, Mitsubishi Chemical Corp, Mitsubishi Kasei Corp filed Critical Komatsu Plastics Industry Co Ltd
Publication of EP0560362A2 publication Critical patent/EP0560362A2/de
Publication of EP0560362A3 publication Critical patent/EP0560362A3/xx
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal

Definitions

  • the present invention relates generally to a reinforcement for a concrete structure. More specifically, the invention relates to a fiber reinforced plastic (FRP) reinforcement for a concrete structure.
  • FRP fiber reinforced plastic
  • corrosion resistive FRP rods becomes to be employed as the reinforcement for the concrete.
  • the FRP reinforcement for the concrete is provided with the outer peripheral surface having uneven profile for strengthening bonding with the concrete.
  • the conventional FRP reinforcement is formed with the uneven profile by a cutting process on the outer peripheral surface.
  • Fig. 11 shows the FRP reinforcement disclosed in Japanese Unexamined Utility Model Publication No. 62-140115 , which is formed by winding a FRP strip d on a core of a FRP rod c and bonding thereon for forming projected portions.
  • the latter illustrated in Fig. 11 , may avoid lowering of the tensile strength of the FRPs per se which form the rod of the core c and the strip d forming the projected portions.
  • the core c and the projected portion d are bonded by resin, it still encounters a problem in a resistance against the shearing stress.
  • a FRP reinforcement for a concrete structure has an integral structure of a core portion and projected portions so that reinforcing fiber extends in series over the core portion and the projected portion.
  • the series fiber extending over the core portion and the projected portion may contribute for improving shearing strength of the projected portion relative to the core portion in the axial direction, and as well, for improving strength against a concentrated stress at the raising edge of the projected portion.
  • a fiber reinforced plastic reinforcement for concrete structure comprises: a core made of a fiber reinforced plastic material composed of a matrix resin and reinforcing fiber; uneven profile portion integrally formed on the peripheral surface portion of the core having alternately arranged first higher portions and second lower portions; and the reinforcing fiber extending in series across the core and the uneven profile portion.
  • the first higher portions are positioned radially outside beyond the second lower portions in a distance range of 1/1000 to 1/10 times of a diameter of the reinforcement.
  • the width of the second lower portion is preferably in a range of 1/3 to 1/1 times of the diameter of the reinforcement.
  • a pitch of the second lower portions is preferably in a range of 1 to 6 times of the diameter of the reinforcement.
  • the first higher portions may be formed by projections formed integrally with the core, through which projections and the core, the reinforcing fiber extends in series.
  • the first higher portions may be formed with a sequence of projection extending around the outer periphery of the core in spiral fashion.
  • the first higher portions are formed with two elongated projections extending around the outer periphery of the core in mutually intersecting fashion.
  • the second lower portions are formed by grooves formed integrally with the core, through which grooves and the core, the reinforcing fiber extends in series.
  • the second lower portions may be formed with a sequence of groove extending around the outer periphery of the core in spiral fashion.
  • the second lower portions may alternative be formed with two elongated grooves extending around the outer periphery of the core in mutually intersecting fashion.
  • the two grooves are formed on the outer periphery of the core in spiral fashion with mutually opposite spiral directions.
  • the groove is formed by impression in the fabrication process before completely curing of the matrix resin.
  • the reference numeral 1 denotes the preferred embodiment of a FRP reinforcement for a concrete (which will be hereinafter referred to as "reinforcement") according to the present invention.
  • the reinforcement 1 has the construction similarly to those in the prior art, in which projected portions 3 are projected from the outer circumference of a core portion 2 for providing an uneven surface profile.
  • the projected portions 3 are formed integrally with the core portion 2 .
  • reinforcing fiber 4 extends in series over the core portion 2 and the projected portions 3 without interruption at the projected portion 3 .
  • the configuration of the projected portions should not be limited to the specific configuration as illustrated and can be various configurations, such as a spiral form, deformed form or so forth.
  • the projected portion 3 can be of spiral configuration 3a as illustrated in Fig. 3A .
  • the groove 5 as shown in Fig. 3B is a singular groove, and while the grooves 5a and 5b in Fig. 3C form dual grooves intersecting to each other. In these case, the section of the grooves 5 , 5a and 5b is as illustrated in Fig. 2B . As can be seen from Fig. 2B , even in this case, the reinforcing fiber 4 is maintained in series over the core portion 2 and the grooves 5 , 5a and 5b .
  • a mold of the corresponding configuration of the reinforcement is separated into two segments in an extruding direction.
  • spiral projections in the corresponding configurations to the grooves to be formed are projected.
  • both segments are driven to rotate in mutually opposite rotating directions at an angular velocity corresponding to the spiral pitches to form the reinforcement.
  • one of the segments is adapted to form the spiral groove 5a and the other segment is adapted to form the spiral groove 5b .
  • Molten or softened resin matrix with reinforcing fiber is extruded into the rotating segments to path therethrough.
  • the extrusion speed of the molten or softened resin matrix with the reinforcing fiber is adjusted to be synchronous with the rotation of the mold so that the predetermined pitch of the spiral grooves can be impressed on the surface of the material. Therefore, at the end of the mold, the dual grooves having opposite spiral direction can be formed. In this case, since the grooves are formed by impression without employing the cutting process, the reinforcing fiber 4 becomes series over the core portion and the grooves as illustrated in Fig. 2B . Therefore, by curing the reinforcement material on which the dual, intersecting grooves 5a and 5b are formed, the FRP reinforcement with the dual, intersecting grooves can be formed with series fiber.
  • the alternative process may be applicable for the reinforcement material after molding process, in which the reinforcement material is formed into plain cylindrical rod shaped configuration.
  • a pair of impression strips are wound in mutually opposite winding directions with rotating and feeding the reinforcement material at the desired angular velocity and feeding speed corresponding to the desired pitches of the grooves to be formed on the surface of the reinforcement material.
  • the groove 5a is formed with one impression strip and the groove 5b is formed with the other impression strip.
  • the matrix resin is selected among thermosetting resin, such as epoxy resin, unsaturated polyester, phenol resin or so forth and thermoplastic resin, such as nylon, polyester or so forth.
  • the reinforcing fiber is selected among inorganic fiber, such as carbon fiber, glass fiber or so forth, organic fiber, such as aramid fiber or so forth.
  • any suitable materials for forming FRP can be used as the material for the matrix and the reinforcing fiber.
  • the normal product represents the FRP reinforcement having plain surface without no uneven profile.
  • the single groove represents the FRP reinforcement with singular groove as illustrated in Fig. 3B .
  • the intersecting groove represents the FRP reinforcement with the dual, intersecting grooves as illustrated in Fig. 3C .
  • the iron reinforcement represents the conventional deformed iron reinforcement.
  • test pieces of the illustrated dimension are formed by adhering and curing fast-setting cement 7 at one end of the reinforcement 6 . Then, with abutting the fast-setting cement 7 onto an abutting plate 8 , a tension is applied to the other end of the reinforcement 6 in the condition of 5 mm/min. Adhering forces up to loosening off of the fast-setting concrete are measured and compared with respect to respective test pieces.
  • Figs. 6A and 6B The manner of above-mentioned testing method and loading condition are shown in Figs. 6A and 6B .
  • the reference numeral 9 represents a concrete structures reinforced by respective reinforcements for comparison, and 11 denotes a fulcrum.
  • the FRP reinforcement is superior over the iron reinforcement in the cracking load and the destructive load.
  • the resultant cracking load demonstrates comparable or superior adhering performance to or over the iron reinforcement.
  • the resultant destructive load demonstrates sufficient reinforcement effect as RC structure.
  • the reference numeral 12 denotes the concrete structure for which the tension member is applied.
  • the small height of the projected portions or the small depth of the grooves so as not to degrade the tensile strength.
  • the preferred range of the height of the projected portion and/or the depth of the groove is 1/1000 to 1/10 of the diameter of the reinforcement.
  • the wider width of the groove or interval of the projected portions is preferred in the light of the shearing strength since greater amount of concrete can be received therein.
  • the preferred range of the width is 1/3 to 1/1 of the diameter of the reinforcement.
  • the smaller pitch of the grooves is preferred for greater number of grooves can be provided for higher concrete adhering strength.
  • the preferred pitch is in a range of 1 to 6 times of the diameter of the reinforcement.
  • the embodiment of the FRP reinforcement having the dual, intersecting grooves can provide high concrete adhering strength with small depth of the grooves which contributes for increasing of the tensile strength.
  • the FRP reinforcement can exhibit remarkably high shearing strength. Furthermore, in case of the FRP reinforcement having the projected portions, the series reinforcing fiber may provide sufficient strength for withstanding to stress concentrated to the raising edge of the projected portion.
  • the FRP reinforcement according to the present invention When the FRP reinforcement according to the present invention is applied as the reinforcement for the concrete, it can exhibit excellent axial shearing strength to provide sufficient resistance against high load exerted on the concrete structure. These effects can also be attained when the FRP reinforcement according to the present invention is applied for stirrup reinforcement or hoop reinforcement as illustrated in Figs. 8A and 8B . It should be noted that in these figures, the reference numeral 14 denotes the groove.
  • the reinforcement according to the present invention when employed as the reinforcement for the precasted concrete, even if the tension is applied to the reinforcement in advance of curing of the concrete, the series fiber extending over the core and the uneven portions will exhibit the effects set forth above so that it may successfully withstand to a tension force after releasing of the tension to provide sufficient strength as the tension member of the pre-stressed concrete.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP19930103946 1992-03-13 1993-03-11 Faserverstärkte Kunststoffbewehrung für Beton Ceased EP0560362A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8830992 1992-03-13
JP88309/92 1992-03-13

Publications (2)

Publication Number Publication Date
EP0560362A2 true EP0560362A2 (de) 1993-09-15
EP0560362A3 EP0560362A3 (de) 1994-01-05

Family

ID=13939334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930103946 Ceased EP0560362A2 (de) 1992-03-13 1993-03-11 Faserverstärkte Kunststoffbewehrung für Beton

Country Status (1)

Country Link
EP (1) EP0560362A2 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000824A1 (en) * 1994-06-28 1996-01-11 Marshall Industries Composites Reinforcing structural rebar and method of making the same
EP0733465A1 (de) * 1993-12-03 1996-09-25 Komatsu Ltd. Verfahren und vorrichtung, das faserverstärkte plastikstäbe, die eine schraubenförmige rille aufweisen, kontinuierlich durch ein formwerkzeug zieht
US5876553A (en) * 1994-06-28 1999-03-02 Marshall Industries Composites, Inc. Apparatus for forming reinforcing structural rebar
US6058674A (en) * 1997-05-05 2000-05-09 Teksource, Lc Structural members for use in wheelchairs
EP1253259A2 (de) * 2001-04-28 2002-10-30 Schöck Entwicklungsgesellschaft mbH Bewehrungsstab aus faserverstärktem Kunststoff
US6485660B1 (en) 1996-10-07 2002-11-26 Marshall Industries Composites, Inc. Reinforced composite product and apparatus and method for producing same
WO2003001005A1 (en) * 2001-06-22 2003-01-03 Concordia University Non-metallic reinforcement member for the reinforcement of a structure and process of its manufacture
KR100808938B1 (ko) 2006-06-09 2008-03-03 주식회사 스틸코리아 콘크리트용 섬유강화 복합체 보강근
EP2000609A1 (de) * 2007-06-08 2008-12-10 SCHÖCK BAUTEILE GmbH Bewehrungsstab
DE102010032915A1 (de) * 2010-07-30 2012-02-02 Cristiano Bonomi Kunststoffstrang und seine Verwendung in Beton
WO2013006964A1 (fr) * 2011-07-14 2013-01-17 Pultrall Inc. Tige courbée de renforcement ayant une résistance mécanique améliorée à l'endroit de sa courbure et méthode pour produire celle-ci
DE102014102861A1 (de) * 2014-03-04 2015-09-10 Technische Universität Dresden Bewehrungsgitter für den Betonbau, Hochleistungsfilamentgarn für den Betonbau und Verfahren zu deren Herstellung
DE102015113302A1 (de) * 2015-08-12 2017-02-16 Rehau Ag + Co Betonbauteil-Bewehrungselement
CN107662281A (zh) * 2017-09-22 2018-02-06 中建交通建设集团有限公司 异形玻璃纤维筋与钢筋的连接节点、混合筋笼及施工方法
DE102017107948A1 (de) * 2017-04-12 2018-10-18 Technische Universität Dresden Bewehrungsstab zum Einbringen in eine Betonmatrix sowie dessen Herstellungsverfahren, ein Bewehrungssystem aus mehreren Bewehrungsstäben sowie ein Betonbauteil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB592890A (en) * 1944-10-26 1947-10-02 John Grant Jackson Improvements in and relating to structural members or bodies reinforced by structural elements
DE1936078A1 (de) * 1969-07-16 1971-01-28 Karl Karner Bewehrungsstaebe fuer Betonkonstruktionen
EP0199348A2 (de) * 1985-04-26 1986-10-29 Societe Nationale De L'amiante Baustab für die Armierung von Betonmaterial
EP0363779A1 (de) * 1988-10-08 1990-04-18 Dyckerhoff & Widmann Aktiengesellschaft Vorrichtung zur Verankerung eines stabförmigen Zugglieds aus Faserverbundwerkstoff

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB592890A (en) * 1944-10-26 1947-10-02 John Grant Jackson Improvements in and relating to structural members or bodies reinforced by structural elements
DE1936078A1 (de) * 1969-07-16 1971-01-28 Karl Karner Bewehrungsstaebe fuer Betonkonstruktionen
EP0199348A2 (de) * 1985-04-26 1986-10-29 Societe Nationale De L'amiante Baustab für die Armierung von Betonmaterial
EP0363779A1 (de) * 1988-10-08 1990-04-18 Dyckerhoff & Widmann Aktiengesellschaft Vorrichtung zur Verankerung eines stabförmigen Zugglieds aus Faserverbundwerkstoff

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733465A1 (de) * 1993-12-03 1996-09-25 Komatsu Ltd. Verfahren und vorrichtung, das faserverstärkte plastikstäbe, die eine schraubenförmige rille aufweisen, kontinuierlich durch ein formwerkzeug zieht
EP0733465A4 (de) * 1993-12-03 1997-04-16 Komatsu Mfg Co Ltd Verfahren und vorrichtung, das faserverstärkte plastikstäbe, die eine schraubenförmige rille aufweisen, kontinuierlich durch ein formwerkzeug zieht
US5811051A (en) * 1993-12-03 1998-09-22 Komatsu Ltd. Method and apparatus for continuously draw-molding fiber reinforced plastic rod formed with spiral groove
WO1996000824A1 (en) * 1994-06-28 1996-01-11 Marshall Industries Composites Reinforcing structural rebar and method of making the same
US5650109A (en) * 1994-06-28 1997-07-22 Reichhold Chemicals, Inc. Method of making reinforcing structural rebar
AU683161B2 (en) * 1994-06-28 1997-10-30 Marshall Industries Composites Reinforcing structural rebar and method of making the same
US5851468A (en) * 1994-06-28 1998-12-22 Kaiser; Mark A. Reinforcing structural rebar and method of making the same
US5876553A (en) * 1994-06-28 1999-03-02 Marshall Industries Composites, Inc. Apparatus for forming reinforcing structural rebar
US6485660B1 (en) 1996-10-07 2002-11-26 Marshall Industries Composites, Inc. Reinforced composite product and apparatus and method for producing same
US6493914B2 (en) 1996-10-07 2002-12-17 Marshall Industries Composites, Inc. Reinforced composite product and apparatus and method for producing same
US6058674A (en) * 1997-05-05 2000-05-09 Teksource, Lc Structural members for use in wheelchairs
EP1253259A2 (de) * 2001-04-28 2002-10-30 Schöck Entwicklungsgesellschaft mbH Bewehrungsstab aus faserverstärktem Kunststoff
EP1253259A3 (de) * 2001-04-28 2002-12-18 Schöck Entwicklungsgesellschaft mbH Bewehrungsstab aus faserverstärktem Kunststoff
WO2003001005A1 (en) * 2001-06-22 2003-01-03 Concordia University Non-metallic reinforcement member for the reinforcement of a structure and process of its manufacture
KR100808938B1 (ko) 2006-06-09 2008-03-03 주식회사 스틸코리아 콘크리트용 섬유강화 복합체 보강근
EP2000609A1 (de) * 2007-06-08 2008-12-10 SCHÖCK BAUTEILE GmbH Bewehrungsstab
DE102010032915A1 (de) * 2010-07-30 2012-02-02 Cristiano Bonomi Kunststoffstrang und seine Verwendung in Beton
WO2013006964A1 (fr) * 2011-07-14 2013-01-17 Pultrall Inc. Tige courbée de renforcement ayant une résistance mécanique améliorée à l'endroit de sa courbure et méthode pour produire celle-ci
DE102014102861A1 (de) * 2014-03-04 2015-09-10 Technische Universität Dresden Bewehrungsgitter für den Betonbau, Hochleistungsfilamentgarn für den Betonbau und Verfahren zu deren Herstellung
DE102015113302A1 (de) * 2015-08-12 2017-02-16 Rehau Ag + Co Betonbauteil-Bewehrungselement
DE102017107948A1 (de) * 2017-04-12 2018-10-18 Technische Universität Dresden Bewehrungsstab zum Einbringen in eine Betonmatrix sowie dessen Herstellungsverfahren, ein Bewehrungssystem aus mehreren Bewehrungsstäben sowie ein Betonbauteil
CN107662281A (zh) * 2017-09-22 2018-02-06 中建交通建设集团有限公司 异形玻璃纤维筋与钢筋的连接节点、混合筋笼及施工方法

Also Published As

Publication number Publication date
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