WO2005056948A1 - Element structurel - Google Patents

Element structurel Download PDF

Info

Publication number
WO2005056948A1
WO2005056948A1 PCT/AU2004/001748 AU2004001748W WO2005056948A1 WO 2005056948 A1 WO2005056948 A1 WO 2005056948A1 AU 2004001748 W AU2004001748 W AU 2004001748W WO 2005056948 A1 WO2005056948 A1 WO 2005056948A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforced plastic
fibre reinforced
structural element
members
tensioned
Prior art date
Application number
PCT/AU2004/001748
Other languages
English (en)
Inventor
Gerardus Maria Van Erp
Timothy John Heldt
Craig Leslie Cattell
Darren James Browne
Roy Marsh
Original Assignee
The University Of Southern Queensland
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
Priority claimed from AU2003906805A external-priority patent/AU2003906805A0/en
Application filed by The University Of Southern Queensland filed Critical The University Of Southern Queensland
Priority to EP04802050A priority Critical patent/EP1694926A1/fr
Priority to CA002548508A priority patent/CA2548508A1/fr
Priority to AU2004297294A priority patent/AU2004297294A1/en
Priority to JP2006543321A priority patent/JP2007514077A/ja
Publication of WO2005056948A1 publication Critical patent/WO2005056948A1/fr

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
    • E04C5/085—Tensile members made of fiber reinforced plastics
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
    • 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

  • This invention relates to a structural element.
  • the invention relates to a structural element constructed of polymer concrete.
  • Polymer concretes offer possibilities for meeting these new requirements.
  • Polymer concrete consists of aggregates bonded together by a resin binder instead of a cement binder that is used in standard cement concrete.
  • Polymer concrete has generally good durability and chemical resistance and is therefore used in various applications such as in pipes, tunnel supports, bridge decks and electrolytic containers. Additional advantages of polymer concrete includes very low permeability and very fast curing times.
  • polymer concrete structures are generally smaller and significantly lighter than equivalent structures made out of standard concrete.
  • polymer concrete structures due to the relatively low Modulus of Elasticity of polymer concrete, compared to standard concrete, polymer concrete structures have a tendency to deflect significantly more than equivalent standard concrete structures.
  • polymer concrete structures generally require reinforcement to carry the tensile loads. Even though reinforcement is effective in carrying tensile forces, in many situations it cannot prevent cracks from occurring in the tensile zone of a polymer concrete member.
  • Traditional steel reinforcement bars can be used in a polymer concrete structure but as polymer concrete is often used in corrosive environments, these cracks can lead to corrosion of steel reinforcement.
  • Composite reinforcement has also been used in polymer concrete to address the corrosion problem of steel reinforcement.
  • the composite reinforcement used has the same shape as steel reinforcement bars, i.e., ribbed or circular bars.
  • cracks generally result in serious stress concentrations at the locations of the cracks which, due to the brittle nature of composite reinforcement, can lead to premature failure of the composite reinforcement. The latter is of particular concern in dynamic loading environments.
  • cracks can seriously affect the aesthetics of the polymer concrete members and lead to safety concerns in the general public.
  • prestressing of the reinforcement has been used to assist in preventing cracking from occurring within the concrete structure. Two different methods are widely used for this purpose namely post-tensioning and pre-tensioning. In post-tensioning the reinforcement is tensioned after the concrete has hardened.
  • the reinforcement is not bounded to the surrounding concrete at the time of prestressing, but is placed in special ducts that pass through the member. At one end, the reinforcement is anchored to the hardened concrete using a localised anchor, and at the other end it is jacked against the concrete until the required level of prestress is obtained and then locked off. Upon completion the ducts may or may not be pressure grouted.
  • a member is pre-tensioned if the prestressing reinforcement is tensioned before the concrete is cast. The reinforcement is tensioned between two end abutments and then the concrete is cast. When the concrete has attained sufficient strength, the prestressing force is released from the abutments. As the reinforcement attempts to contract elastically, the concrete is forced into compression.
  • JP 5239885 a foamable resin is used to create a composite fibre reinforcement bar of an uneven shaped. Due to the uneven shape, composite reinforcement bar is used to grip the concrete in order to achieve pre-stressing.
  • CFRP 5239885 a foamable resin is used to create a composite fibre reinforcement bar of an uneven shaped. Due to the uneven shape, composite reinforcement bar is used to grip the concrete in order to achieve pre-stressing.
  • OBJECT OF THE INVENTION It is an object of the invention to overcome or alleviate one or more of the above disadvantages or provide the consumer with a useful or commercial choice. It is a preferred object of this invention to produce structural elements made from polymer concrete with significantly improved crack resistance. It is a further preferred object of the invention to produce polymer concrete structures with improved deflection behaviour. It is a still further preferred object of the invention to produce polymer concrete structures with improved recovery after overload.
  • the invention resides in a structural element comprising: at least one pre-tensioned fibre reinforced plastic reinforcement member, the pre-tensioned fibre reinforced plastic reinforcement member having a constant cross-section through a length of the reinforcement; and a polymer concrete member surrounding said pre-tensioned fibre reinforced plastic reinforcement member; wherein a force transfer between the fibre reinforced plastic reinforcement member and the castable material is through polymer adhesive bonding.
  • a ratio of a perimeter length of the pre-tensioned fibre reinforced plastic reinforcement member over the cross sectional area of the pre-tensioned fibre reinforced plastic reinforcement member is significantly larger than a ratio of a perimeter length over the cross sectional area of a circular bar having the same cross sectional area. This is to reduce the magnitude of shear stresses in a contact area between the reinforcement and the polymer concrete.
  • a ratio of a perimeter length of the pre-tensioned fibre reinforced plastic reinforcement member over the cross sectional area of the pre-tensioned fibre reinforced plastic reinforcement member is at least one-third larger than a ratio of a perimeter length over the cross sectional area of a circular bar having the same cross sectional area.
  • a ratio of a perimeter length of the pre- tensioned fibre reinforced plastic reinforcement member over the cross sectional area of the pre-tensioned fibre reinforced plastic reinforcement member is at least one half larger than a ratio of a perimeter length over the cross sectional area of a circular bar having the same cross sectional area. Still more preferably, a ratio of a perimeter length of the pre- tensioned fibre reinforced plastic reinforcement member over the cross sectional area of the pre-tensioned fibre reinforced plastic reinforcement member is at least double a ratio of a perimeter length over the cross sectional area of a circular bar having the same cross sectional area.
  • a ratio of a perimeter length of the pre- tensioned fibre reinforced plastic reinforcement member over the cross sectional area of the pre-tensioned fibre reinforced plastic reinforcement member is at least quadruple a ratio of a perimeter length over the cross sectional area of a circular bar having the same cross sectional area.
  • a suitable perimeter/area ratio is achieved by using fibre reinforced plastic reinforcement members with a thin walled cross section.
  • the fibre reinforced plastic reinforcement members may be solid or hollow.
  • the wall thickness of the pre tensioned fibre reinforced plastic reinforcement member is between 1 and 5 mm.
  • the structural element may include at least one non pre- tensioned fibre reinforced plastic reinforcement member.
  • the level of pretension in the fibre composite reinforcement can vary from 0 up to almost 80 - 100% of the ultimate tensile strength of the reinforcement.
  • the level of pretension in the reinforcement is between 20-50% of the ultimate tensile strength of the reinforcement member.
  • the fibre reinforced plastic reinforcement members may be produced from any suitable glass, carbon or aramid fibre and/or plastic material dependant upon the desired properties of the structural element.
  • the surface area of the fibre reinforced plastic reinforcement members that contact the castable material is abraded to increase adhesion between the castable material and the fibre reinforced plastic reinforcement members.
  • the fibre reinforced plastic reinforcement members may be coated with a sand and/or gravel interface to increase adhesion.
  • the pre-tensioned fibre reinforced plastic reinforcement members may be pultruded fibre reinforced plastic.
  • the fibre reinforced plastic reinforcement members have flat surfaces to simplify the sanding or abrading process.
  • the reinforcing members may be hollow to save maximum weight.
  • the pultruded, pre-tensioned fibre reinforced plastic reinforcement members may be filled with standard concrete, polymer concrete or a filled resin system and a metal or fibre composite reinforcing bar to further increase their load carrying capacity and stiffness.
  • the hollow, pultruded, pre-tensioned fibre reinforced plastic reinforcement members may be filled with other materials dependant upon the desired properties of the tubular reinforcing element.
  • the hollow pultruded, pre-tensioned fibre reinforced plastic reinforcement members may be filled before or after the pre-tensioning of the members.
  • the members are filled after the pre-tensioning of the fibre reinforced plastic reinforcement members.
  • the fibre reinforced plastic members may extend longitudinally and transversely through the structural element. One or more of the longitudinal and/or transverse fibre reinforced plastic members may be pre- tensioned.
  • the transverse fibre reinforced plastic members may pass through the longitudinal fibre reinforced plastic members. Slots may be located in either or both of the transverse and longitudinal fibre reinforced plastic reinforcement members to allow them to intersect.
  • the longitudinal fibre reinforced plastic members and transverse fibre reinforced plastic members may be locked to each other after they intersect. Notches may be provided in the longitudinal fibre reinforced plastic reinforcement members and/or transverse fibre reinforced plastic reinforcement members to engage with the slot on the other of the members to lock the members together.
  • the polymer concrete formulation may include an amount of polymer resin, an amount of a light aggregate with a specific gravity less than that of the resin and an amount of a heavy aggregate with a specific gravity larger than that of the resin.
  • the resin may be any suitable polyester, vinylester, epoxy, phenolic or polyurethane resin or combination of resins dependent on the desired structural and corrosion resistant properties of the polymer concrete.
  • the resin content is between 25-30% by volume.
  • the light aggregate with a specific gravity less than that of the resin can be any type of light aggregate or combination of light aggregates dependent on the desired structural and corrosion resistant properties of the polymer concrete.
  • the light aggregates have a specific gravity of 0.5 to 0.9.
  • the light aggregates usually make up 20-25% by volume of the polymer concrete.
  • the light aggregate are centre spheres.
  • the centre spheres normally have a specific gravity of approximately 0.7.
  • hollow glass microspheres with a similar specific gravity and volume may be used.
  • the heavy aggregate with a specific gravity larger than that of the resin can be any type of heavy aggregate or combination of heavy aggregates dependent on the desired structural and corrosion resistant properties of the polymer concrete.
  • the heavy aggregates usually make up 40-60% by volume of the polymer concrete.
  • the heavy aggregate has a specific gravity of between 2 to 3.5.
  • the heavy aggregate is basalt.
  • the basalt is crushed.
  • the crushed basalt may have a particle size 1 to 7 mm.
  • the basalt makes up between 40-50% by volume of the polymer concrete.
  • the basalt normally has a specific gravity of approximately 2.8.
  • natural or artificial sand that has a similar specific gravity as basalt, may be used.
  • the sand makes up between 50-60% by volume of the polymer concrete.
  • the heavy aggregate may be made up of one or more of coloured stones, gravel, limestone, shells, glass or the like material.
  • the resin contains a thixotrope to keep the light aggregate in suspension.
  • the polymer concrete of the present invention may also include fibrous reinforcement material to increase the structural properties of the polymer concrete mix.
  • the reinforcement material may be glass, aramid, carbon, timber and/or thermo plastic fibres.
  • the invention resides in a method of producing a structural element formed from polymer concrete, said method including the steps of: producing a mould that has a portion of an outer shape of the structural element to be produced; placing fibre reinforced plastic members within the mould, tensioning at least one of the fibre reinforced plastic members; locating polymer concrete over said fibre reinforced plastic members; allowing said castable material to set to form said structural element; and releasing said pre-tensioned members after the castable material has set to form said structural element.
  • the fibre reinforced plastic members may be abraded prior to the fibre reinforced plastic members being introduced into the mould.
  • the fibre reinforced plastic members may be coated with sand and/or gravel interface to increase adhesion.
  • the fibre reinforced plastic members may be located within the mould tensioned and polymer concrete poured over the fibre reinforced plastic members. In another embodiment, the fibre reinforced plastic members may be located within the mould after sufficient castable material to complete the structural element has been delivered into the mould. At least one of the fibre reinforced plastic members may be tensioned before the polymer concrete sets. In still another embodiment, a portion of polymer concrete may be introduced into the mould and some of the fibre reinforced plastic members introduced into the mould and pretensioned. More polymer concrete may then be introduced into the mould and more fibre reinforced plastic members may be introduced into the mould and pretensioned. This process may be continued until the structural element has been completed.
  • the hollow fibre reinforced plastic members may be filled with concrete, polymer concrete or filled resin system and/or metal or reinforced plastic bar.
  • the hollow fibre reinforced plastic members may be filled after tensioning of the hollow fibre reinforced plastic members. Normally, the hollow fibre reinforced plastic members are filled after the tensioning has been removed and the polymer concrete has set. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Embodiments of the invention, byway of examples only, will be described with reference to the accompanying drawings in which: FIGS. 1A to 1 D are transverse cross-sectional views of fibre reinforced plastic reinforcement members that have large ratios of perimeter length over cross sectional area resulting in reduced shear stresses in the contact area and hence are suitable for pre-tensioning; FIGS.
  • FIG. 3 is a perspective view of a beam according to a first embodiment of the invention
  • FIGS. 4A to 4F are side cross-sectional views of the beam of FIG. 3A being formed
  • FIG. 5 is a perspective view of a park bench slat according to a second embodiment of the invention
  • FIG. 6 is a perspective view of a telephone pole according to a fourth embodiment of the invention
  • FIG. 7 is a perspective view of another beam according to a third embodiment of the invention.
  • FIGS. 1A to 1 D and FIGS. 2A to 2C show transverse cross- sectional views of fibre reinforced plastic reinforcement members 20.
  • various shapes of fibre reinforced plastic reinforcement members may be used.
  • FIGS. 1 A to 1 D illustrate fibre reinforced plastic reinforcement members that are suitable for use to produce a prestressed structural element. The reasons that each of the fibre reinforced plastic reinforcement members shown are able to be used is due to the fact that low stresses occur throughout the members when located in a structural element. On the other hand, the shear stress that occurs in the fibre reinforced plastic reinforcement members shown in FIGS.
  • FIGS. 1A to 1 D operate effectively as a perimeter length 21 of each of the fibre reinforced plastic reinforcement members is relatively large compared to the cross-sectional area 22.
  • the fibre reinforced plastic reinforcement members shown in FIGS. 2A and 2B have a relatively low perimeter length 21 when compared to the cross-sectional area 22.
  • the large perimeter length of the fibre reinforced plastic reinforcement members shown in FIGS. 1A to 1 D provide a large adhesion surface or a contact area to which a polymer concrete is able to adhere to the fibre reinforced plastic reinforcement members 20. This adhesion can be enhanced by abrading the contact area of the fibre reinforced plastic reinforcement members.
  • the perimeter/area ratio has been calculated for each of the fibre reinforced plastic reinforcement members shown in FIGS. 1A, 1 B and 2B.
  • Each of the fibre reinforced plastic reinforcement members have the same cross sectional area and hence the same theoretical tensile strength.
  • FIG. 3 shows a structural element in the form of a prestressed concrete beam 300.
  • the concrete beam is formed from polymer concrete 30 that surrounds a square tubular fibre reinforced plastic reinforcement member 20 that extends the length of the beam. Additional polymer concrete 40 is located within the fibre reinforced plastic reinforcement member 20 and a steel reinforcement bar 50 is imbedded within the polymer concrete 40 and extends the length of the fibre reinforced plastic reinforcement member 20.
  • FIGS. 4A to 4F show the process that is used to form the prestressed beam 300 of FIG. 3. In order to produce the prestressed beam 300, a mould 60 is produced. The fibre reinforced plastic reinforcement member 20 is then tensioned.
  • the tensioning of the fibre reinforced plastic reinforcement member 20 can be conducted in any number of ways but generally involves placing a clamp on either end of the fibre reinforced plastic reinforcement member 20 and applying opposing forces to the fibre reinforced plastic reinforcement member 20 as indicated by arrows. Once the fibre reinforced plastic reinforcement member 20 has been tensioned, it is located within the mould as shown in FIG.4A. Polymer concrete 30 is then poured into the mould as shown in FIG. 4B until the entire fibre reinforced plastic reinforcement member is covered as shown in FIG. 4C. At this point, the polymer concrete 30 is allowed to set. Once the polymer concrete 30 has set then the tensioning of the fibre reinforced plastic reinforcement member 20 is released to create a beam 300 that is prestressed.
  • FIG. 4E polymer concrete 40 is added within the fibre reinforced plastic reinforcement member 20.
  • FIG. 4F shows that the addition of a steel reinforcement bar 50 can also be added. By adding the polymer concrete 40 and the reinforcement bar 50, the stiffness, strength and ductility properties of the beam are significantly increased.
  • FIG. 5 is a structural element in the form of a prestressed polymer concrete slat 400 that can be used for park benches.
  • the fibre reinforced plastic reinforcement member 20 is a flat planar member that extends the length of the slat and is surrounded by polymer concrete 30.
  • FIG. 6 shows a structural element in the form of a prestressed concrete telegraph pole 500.
  • several square tubular fibre reinforced plastic reinforcement members 20 are utilised to form the telegraph pole.
  • the fibre reinforced plastic reinforcement members are surrounded by polymer concrete 30 to form the telegraph pole 500.
  • FIG. 7 is a structural element in the form of another prestressed concrete beam 700. In this embodiment different fibre reinforced plastic reinforcement members are used.
  • a single flat planar fibre reinforced plastic reinforcement member 24 and four square tubular fibre reinforced plastic reinforcement members 25 are used to form the beam.
  • All of the fibre reinforced plastic reinforcement members are pre-tensioned as discussed previously.
  • a series of ligatures 26 are located around the fibre reinforced plastic reinforcement members to assist in tying the fibre reinforced plastic reinforcement members together and to provide lateral confinement to the beam 700.
  • FIG. 8 a further prestressed reinforcement beam 800 is shown.
  • the beam 800 has a standard concrete top 70 and a polymer concrete base 30.
  • a series of square tubular fibre reinforced plastic reinforcement members 20 are located within the polymer concrete.
  • Two ligatures 26 extend through the traditional concrete 70 and the polymer concrete 30 and extend around the fibre reinforced plastic reinforcement members 20 to tie the traditional concrete 70, polymer concrete 30 and fibre reinforced plastic reinforcement members 20 together.
  • the beam 800 is also produced so that a hollow 80 extends through the beam 800 to make the beam 800 lighter.
  • This hollow may be created by using a sacrificial foam void former. It should be appreciated that during installation of any of the above structural members, holes are often made into the member to accommodate bolts, screws, and/or nails. Because of their elongated cross sectional geometry, thin walled solid and hollow fibre composite reinforcement members spread the reinforcement fibres over a large area of the cross section of the structural member, hence the damage caused by bolt holes, screws and/or nails is generally limited to a small number of individual fibres. In the case of thick walled solid reinforcement members, all fibres are bundled together in a small area, hence a bolt or screw that penetrates this area will damage a large number of reinforcement fibres and will cause major damage to the reinforcement member which might lead to failure.
  • the contact area provided by the external surface of the fibre reinforced plastic reinforcement members is sufficiently large so that the polymer concrete is able to adhere to the surface of the fibre reinforced plastic reinforcement members without creating large shear stress.
  • the shear stress within the fibre reinforced plastic reinforcement members is relatively small. This allows the fibre reinforced plastic reinforcement members to be pre-tensioned in order to create prestressed structural elements.
  • the polymer bond that is formed between the polymer concrete and the fibre reinforced plastic reinforcement members is high i.e. approximately 50 MPA. This enables fibre reinforced plastic reinforcement members to be used to pre-stress polymer concrete that previously has not been able to be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

L'invention porte sur un élément structurel (400) comprenant au moins un élément de renforcement plastique préalablement tendu (20), cet élément de renforcement possédant une section transversale constante à travers une longueur du renforcement, et un élément de béton polymérique (30) qui entoure ledit élément de renforcement plastique renforcé en fibres et préalablement tendu (20), un transfert de force entre l'élément de renforcement plastique renforcé en fibres et le béton polymérique étant effectué par liaison adhésive polymérique.
PCT/AU2004/001748 2003-12-10 2004-12-10 Element structurel WO2005056948A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04802050A EP1694926A1 (fr) 2003-12-10 2004-12-10 Element structurel
CA002548508A CA2548508A1 (fr) 2003-12-10 2004-12-10 Element structurel
AU2004297294A AU2004297294A1 (en) 2003-12-10 2004-12-10 A structural element
JP2006543321A JP2007514077A (ja) 2003-12-10 2004-12-10 構成要素

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003906805A AU2003906805A0 (en) 2003-12-10 A structural element
AU2003906805 2003-12-10

Publications (1)

Publication Number Publication Date
WO2005056948A1 true WO2005056948A1 (fr) 2005-06-23

Family

ID=34658472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2004/001748 WO2005056948A1 (fr) 2003-12-10 2004-12-10 Element structurel

Country Status (4)

Country Link
EP (1) EP1694926A1 (fr)
JP (1) JP2007514077A (fr)
CA (1) CA2548508A1 (fr)
WO (1) WO2005056948A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1907648A2 (fr) * 2005-07-26 2008-04-09 Loc Composites Pty Ltd Éléments structuraux constitués de panneaux sandwich à mousse syntactique
KR101081042B1 (ko) * 2009-03-19 2011-11-09 경희대학교 산학협력단 합성 콘크리트 보 및 그 시공방법
DE102019003013A1 (de) * 2018-11-14 2020-06-04 Christian Markmann Ein stabförmiger Formkörper bestehend aus mehreren Materialien zur Verwendung für lastabtragende Konstruktionselemente im Bauwesen
CN112627828A (zh) * 2020-11-05 2021-04-09 中煤科工集团北京华宇工程有限公司 矿用井壁结构及其建造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2447446A1 (fr) * 2010-10-28 2012-05-02 Sika Technology AG Ancrage terminal d'éléments de traction sur des supports en béton armé

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU642446A1 (ru) * 1977-04-11 1979-01-15 Московский Ордена Ленина И Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Строительный элемент
NL9101922A (nl) * 1991-11-19 1993-06-16 Akzo Nv Beton gewapend met, bij voorkeur met vezels versterkte, kunststof staven alsmede bijbehorende wapeningsstaaf.
JPH05239885A (ja) * 1992-02-28 1993-09-17 Toray Ind Inc 繊維強化プラスチック製補強筋およびその製造方法
WO1998006913A1 (fr) * 1996-08-12 1998-02-19 Cambridge University Technical Services Limited Fabrication de structures en beton
WO2004029380A1 (fr) * 2002-09-25 2004-04-08 The University Of Southern Queensland Elements structuraux formes de materiaux moulables
US20040130063A1 (en) * 2001-05-24 2004-07-08 Toshiaki Ohta Method of manufacturing prestressed concrete

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU642446A1 (ru) * 1977-04-11 1979-01-15 Московский Ордена Ленина И Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Строительный элемент
NL9101922A (nl) * 1991-11-19 1993-06-16 Akzo Nv Beton gewapend met, bij voorkeur met vezels versterkte, kunststof staven alsmede bijbehorende wapeningsstaaf.
JPH05239885A (ja) * 1992-02-28 1993-09-17 Toray Ind Inc 繊維強化プラスチック製補強筋およびその製造方法
WO1998006913A1 (fr) * 1996-08-12 1998-02-19 Cambridge University Technical Services Limited Fabrication de structures en beton
US20040130063A1 (en) * 2001-05-24 2004-07-08 Toshiaki Ohta Method of manufacturing prestressed concrete
WO2004029380A1 (fr) * 2002-09-25 2004-04-08 The University Of Southern Queensland Elements structuraux formes de materiaux moulables

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197942, Derwent World Patents Index; Class Q44, AN 1979-J9138B, XP002988091 *
DATABASE WPI Week 199342, Derwent World Patents Index; Class Q44, AN 1993-331925, XP002988092 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1907648A2 (fr) * 2005-07-26 2008-04-09 Loc Composites Pty Ltd Éléments structuraux constitués de panneaux sandwich à mousse syntactique
EP1907648A4 (fr) * 2005-07-26 2011-03-09 Loc Composites Pty Ltd Éléments structuraux constitués de panneaux sandwich à mousse syntactique
KR101081042B1 (ko) * 2009-03-19 2011-11-09 경희대학교 산학협력단 합성 콘크리트 보 및 그 시공방법
DE102019003013A1 (de) * 2018-11-14 2020-06-04 Christian Markmann Ein stabförmiger Formkörper bestehend aus mehreren Materialien zur Verwendung für lastabtragende Konstruktionselemente im Bauwesen
CN112627828A (zh) * 2020-11-05 2021-04-09 中煤科工集团北京华宇工程有限公司 矿用井壁结构及其建造方法

Also Published As

Publication number Publication date
JP2007514077A (ja) 2007-05-31
CA2548508A1 (fr) 2005-06-23
EP1694926A1 (fr) 2006-08-30

Similar Documents

Publication Publication Date Title
US20240109811A1 (en) Reinforcement bar and method for manufacturing same
CA2323944C (fr) Adaptation de colonnes en beton existantes par precontrainte externe
US6832454B1 (en) Beam filled with material, deck system and method
CA2221885A1 (fr) Systeme d'ancrage de precontrainte de cables en plastique renforce de fibres
JP4390494B2 (ja) 桁と床版の接合構造及び桁と床版の接合方法
CA3004963C (fr) Systeme et methode d'integration d'un substrat dans une structure en beton
WO2005056948A1 (fr) Element structurel
US11982086B2 (en) Ultra high-performance concrete bond anchor
JP4035075B2 (ja) 既設壁状構造物の補強構造及び方法
JP2000017615A (ja) プレストレストコンクリート橋脚
AU2004297294A1 (en) A structural element
US20060166027A1 (en) Impact resistant composite metal structure
Gaafar Strengthening reinforced concrete beams with prestressed near surface mounted fibre reinforced polymers
AU2021243605A1 (en) Post-tensioned concrete slab with fibres
JP3910976B2 (ja) コンクリート部材およびコンクリート部材の補強方法
CN215518751U (zh) 一种无自由段微型桩式大直径缓粘结预应力抗拔锚杆
Himasree et al. State of the art review of bamboo-reinforced concrete structural elements
CN220665951U (zh) 一种基于cfrp预应力筋的uhpc-nc组合梁体系
Canbolat et al. Behavior of precast high-performance fiber reinforced cement composite coupling beams under large displacement reversals
Mishra et al. Confinement detailing of concrete encased steel concrete composite columns
CN116676854A (zh) 一种基于cfrp预应力筋的uhpc-nc组合梁体系及施工方法
Schonknecht Static and Fatigue Behaviour of Connections in Hybrid Concrete-FRP Truss Bridge Girders
JP2001279614A (ja) プレキャストコンクリートブロックの接合方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DPEN Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2004297294

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2548508

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2004802050

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2006543321

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 547812

Country of ref document: NZ

ENP Entry into the national phase

Ref document number: 2004297294

Country of ref document: AU

Date of ref document: 20041210

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 2004297294

Country of ref document: AU

WWP Wipo information: published in national office

Ref document number: 2004802050

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2004802050

Country of ref document: EP