US20140083044A1 - Anchoring system between a concrete component and a steel component - Google Patents

Anchoring system between a concrete component and a steel component Download PDF

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Publication number
US20140083044A1
US20140083044A1 US14/095,145 US201314095145A US2014083044A1 US 20140083044 A1 US20140083044 A1 US 20140083044A1 US 201314095145 A US201314095145 A US 201314095145A US 2014083044 A1 US2014083044 A1 US 2014083044A1
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US
United States
Prior art keywords
steel
component
concrete
reinforced concrete
structure according
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.)
Abandoned
Application number
US14/095,145
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English (en)
Inventor
Christian Krumb
Serge Naboishikov
Marco Schippers
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.)
Areva GmbH
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Areva GmbH
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 Areva GmbH filed Critical Areva GmbH
Publication of US20140083044A1 publication Critical patent/US20140083044A1/en
Assigned to AREVA GMBH reassignment AREVA GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRUMB, Christian, Schippers, Marco, NABOISHIKOV, Serge
Abandoned 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
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
    • 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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional [3D] extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts

Definitions

  • the invention relates to an anchoring system for forming a non releasable connection between a concrete component and a steel component. It also relates to a reinforced concrete-steel structure produced therewith.
  • the material concrete, and in particular the variant reinforced concrete can be widely used as a building material.
  • the building material is not used exclusively, but in combination with other building materials.
  • individual elements or entire assemblies to be produced from concrete or reinforced concrete and for supplementary elements or assemblies to be produced from another material, for instance steel.
  • the individual elements or assemblies must be connected to one another during assembly. In this case, anchorages are frequently used.
  • the prior art discloses corresponding anchorages or anchoring systems in diverse variations.
  • the configuration of such anchorages or anchoring systems substantially depends on which materials are to be combined with one another and to which loading an anchorage or an anchoring system will be exposed.
  • Austrian patent application AT 505 269 A1 corresponding to U.S. Pat. No. 7,617,990, discloses an anchoring system which has been configured especially for anchoring a concrete component on a steel support, that is to say a steel component.
  • a strip-shaped body made of steel serves as an anchoring element and has for that purpose at least one recess.
  • the anchoring element projects with the recess into the concrete component, and it is welded to the steel support on that side of the anchoring element which is opposite the recess.
  • the permissible maximum loading of such an anchorage is not sufficient for diverse applications.
  • the object on which the invention is based is therefore to develop an anchoring system which is further improved and moreover can be subjected to greater loading, in particular for connecting a concrete component to a steel component.
  • the reinforced concrete-steel structure includes a concrete component, a reinforcement having at least one steel bar mesh with steel bars, a steel component connected non-releasable to the concrete component, and at least one anchor strip having a connecting surface for connecting to the steel component and defining a connection between the steel component and the concrete component.
  • the anchor strip is cast into the concrete component such that the connecting surface of the anchor strip projects from the concrete component.
  • the anchor strip has a number of recesses formed therein and extend at least partially into the concrete component and each is traversed by at least one of the steel bars of the steel bar mesh. Each of the recesses is an indentation open toward the steel component and separating the connecting surface of the anchor strip into subregions spatially separated from one another.
  • An anchoring system serves for forming a nonreleasable connection between a concrete component and a steel component.
  • at least one anchor element formed of an anchor strip is cast into the concrete component in such a way that it projects at least partially from the concrete component.
  • the exposed segment acts as connecting surface to the steel component and is fixedly connected thereto.
  • a number of recesses are provided on the anchor strip on the connecting surface side and extend into the concrete component.
  • Incorporated into that concrete component is at least one steel bar mesh as a reinforcement, wherein each recess on the anchor strip is traversed by at least one steel bar of the mesh.
  • each recess separates the connecting surface into at least two sub regions which are spatially separated from one another.
  • each recess is incorporated into the anchor strip as a lateral indentation which is simple to produce.
  • each recess is then completed to form a type of eye through which at least one steel bar of the steel bar mesh engages. An eye thus formed acts, as it were, as favored linkage point or favored force transmission interface between the concrete component and the steel component.
  • a plurality of regularly arranged recesses in the manner of a tooth row are provided.
  • a very large number of favored linkage points and a uniform distribution thereof can be achieved.
  • Forces acting on the steel component are then also transmitted in a correspondingly uniform manner to the reinforcement and thus to the concrete component.
  • each recess has the contour of a quadrangle or of a symmetrical trapezium. These shapes promote, inter alia, a very simple and thus economically efficient production of the anchor strips.
  • the anchor strips used are profile strips having an L-shaped cross section, T-shaped cross section, or I-shaped cross section.
  • a cross section produces a barb-like effect, that is to say an improved retention of an anchor strip in the concrete, and, on the other hand, it is thus possible to have recourse to commercially available standard profile articles for the starting products for the production of the anchor strips.
  • I-profile strips, U-profile strips, double-T-profile strips and Z-profile strips as starting products are suitable for producing two anchor strips in one production process.
  • the anchor strips are preferably produced from steel, in particular from ferritic or austenitic steel.
  • each anchor strip is connected in an integrally bonded manner, in particular welded, to the corresponding steel component.
  • an anchoring system is also suitable for the construction of a reactor safety container, a pressure container or a tank container.
  • these are constructed from reinforced and, if appropriate, prestressed concrete components which form the concrete shell.
  • a steel shell also referred to as a liner, consisting of a number of steel components, which steel shell ensures that the concrete shell is leak tight.
  • the steel components are connected non-releasably to the concrete components with the aid of anchorages according to the invention.
  • the design and the construction of the anchorage of the steel shell, also referred to as containment liner, of the reactor safety container is of major importance.
  • high requirements on the anchorage are defined in various standards and guidelines.
  • the anchorage must withstand both the forces and loads occurring in normal operation and also in the event of a fault and at the same time prevent crack formation/crack propagation in the steel shell.
  • these requirements can be met more efficiently if the steel shell, the anchorage and the reinforced concrete cooperate in the depth of the anchorage.
  • the anchoring system according to the invention offers a maximum degree of effectiveness.
  • the anchoring profiles are usually welded directly to the steel shell using continuous weld seams on both sides of the profile.
  • the welding usually takes place manually.
  • the lengths of all the weld seams add up to several kilometers.
  • the manual welding work entails high costs.
  • the reinforcing layer can be placed only behind (below) the anchoring profiles. As a result, the maximum bending capacity of the reinforced concrete cross section is reduced.
  • the continuous anchoring profiles represent a physical barrier for the flow of the concrete during the casting process between the individual profiles.
  • the anchoring profiles are embedded only in the applied layer of the concrete without an interface to the reinforcement. As a result, the loading capacity of the anchorage with respect to normal and transverse shear stress is reduced to that of the embedded concrete. Results from numerous tests show that a failure of the concrete occurs before the failure of the anchoring profiles.
  • the anchoring system proposed here which can also be referred to as a “liner shaped anchorage system” provides a far better anchorage of the steel shell (liner) by the specially shaped anchoring profiles (anchor strips) which are provided with recesses for the reinforcement and which allow a cooperation between the anchoring profiles and the reinforced concrete in the manner of a true composite structure. It balances the anchoring system and increases the efficiency of the anchorage. It offers, in particular, the advantages that are now listed.
  • the anchoring system according to the invention allows parts of the reinforcement to be placed in the interspace between the continuous inner webs of the anchoring profiles and the steel shell connected thereto at the outer connecting surfaces while taking the minimum required concrete covering into consideration. Moreover, the system increases the bending strength of the concrete cross section.
  • the recesses in the correspondingly shaped anchoring profiles prevent the formation of a continuous physical barrier which impedes the flow of the concrete during the casting process.
  • the anchoring profiles used couple/integrate at least two layers of crossed reinforcement. This increases the anchoring capacity and makes it possible to achieve a balance between the capacity of the profiles and the reinforced concrete.
  • the anchoring system according to the invention with specially shaped anchoring profiles offers an efficient solution for embedding the profiles into the concrete together with an optimized interface to the reinforcement and with simultaneously a large savings potential with regard to the production costs and production times.
  • this system increases the efficiency of the anchorage of the steel shell. It can be used both for reactor containers and other safety containers (containments) and gas and liquid containers and also for pressure containers.
  • FIG. 1 is a diagrammatic, longitudinal sectional view, represented as a detail, of a structure, namely of a reactor containment, having an anchoring system according to the invention
  • FIG. 2 is a cross-sectional view of two commercially available profile strips
  • FIG. 3 is a side view of a U-profile strip with a cutting line indicated.
  • FIG. 1 there is shown the functional principle of an anchoring system according to the invention.
  • a longitudinal section represented as a detail therein, shows a concrete component 1 which, with the aid of at least one anchor strip 2 , is non-releasable connected to a steel component 3 , also referred to as a liner plate, embodied in the manner of a flat steel plate.
  • a plurality of anchor strips 2 of this type can be situated at a certain distance behind one another perpendicularly to the drawing plane, although this cannot be seen from the figure.
  • the anchor strip 2 in this exemplary embodiment is a half of a steel profile strip which can be produced by dividing into two a commercially available standard profile 4 , 5 shown in FIG. 2 and FIG. 3 .
  • the corresponding standard profile 4 , 5 is severed along a cutting line 7 extending substantially in the strip longitudinal direction 6 .
  • the cutting line 7 is preferably selected such that, as a consequence, there is formed, along both halves, a type of tooth row having teeth separated from one another by recesses or interspaces.
  • the shape of a symmetrical trapezium was selected both for the teeth and for the teeth interspaces of the tooth row.
  • Both anchor strips 2 can be considered as equivalent. They differ only through an offset of the tooth row in the strip longitudinal direction 6 .
  • any suitable separating process can be used, such as, for example, cutting, shearing, punching and related processes such as, for instance, laser cutting.
  • each anchor strip 2 has a strip-like retaining foot 8 which is formed from the corresponding upper or lower flange of the standard profile and which preferably projects outwardly from the plane of the teeth and recesses, i.e. perpendicular to the drawing plane, which retaining foot, in the final mounting state of the anchoring system, also lies in the concrete component 1 and therefore acts, as it were, as a barb.
  • the recesses in the transverse direction 11 are not led completely as far as the retaining foot 8 , but there remains in each case a narrow web 13 connected to the retaining foot 8 .
  • the exposed tooth prangs 9 serve as segments of a connecting surface.
  • welding, soldering or adhesive bonding is used to form at the segments of the connecting surface in each case an integrally bonded connection between the anchor strip 2 and the steel component 3 .
  • weld seams are preferably applied on both sides, at the butting edges of the anchor strip 2 and the steel component 3 .
  • a mesh consisting of steel bars 10 as a reinforcement is incorporated into the concrete component 1 of the exemplary embodiment.
  • the mesh contains a plurality of layers which are stacked above one another in an alternating sequence ABAB in the transverse direction 11 .
  • FIG. 1 exactly four layers are represented.
  • a different, in particular larger, number of layers can likewise be advantageous, however.
  • the steel bars 10 assigned to a layer A are arranged parallel to one another and parallel to the longitudinal direction 6 of the anchor strip 2 and perpendicular to the steel bars 10 of a layer B, which extend perpendicular to the drawing plane.
  • the steel bars 10 are preferably connected to one another at the contact points of the steel bars 10 of two layers situated directly above one another.
  • the type of connection can vary depending on the application. Particularly expedient variants are adhesive bonding, welding or a wrapping with wire.
  • the steel bars 10 of two layers AB situated directly above one another and, if appropriate, also further layers can also be interwoven in that, for example, the steel bars 10 extending perpendicular to the drawing plane are guided past, alternately above and below, the steel bars 10 directly adjacent to them and extending in the longitudinal direction 6 .
  • each tooth interspace of an anchor strip 2 is formed in the manner of an eye 12 .
  • a steel bar 10 of the steel bar mesh traverses such an eye 12 , with the result that transmission of force according to the objective is possible at this point.
  • the steel bars 10 traversing the tooth interspaces each bear against the inner web 13 of the anchor strip 2 .
  • Each tooth interspace can also be traversed by more than one steel bar 10 , or as an exception, by none, if at least some interspaces of the anchor strip 2 are correspondingly traversed by the steel bars 10 . If, for example, tensile forces in the transverse direction 11 act on the respective anchor strip 2 , the latter is secured not only via its retaining foot 8 in the concrete but is additionally anchored by the upper two layers of the steel bar mesh.
  • the steel bar mesh has four layers of crossed and, if appropriate, partially interwoven steel bars 10 , wherein the steel bars 10 of the lowermost layer, as seen in the direction of insertion into the concrete component 1 , are perpendicular to the drawing plane and are guided past below the retaining foot 8 of the anchor strip 2 , parallel to the steel bars 10 traversing the tooth interspaces further above.
  • Some of the steel bars 10 of the immediately higher layer which extend longitudinally with respect to the anchor strip 2 can in this case be arranged in such a way that they are supported from above on the retaining foot 8 and thus do not directly come into contact with the steel bars 10 of the lowermost layer which extend perpendicular thereto.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Joining Of Building Structures In Genera (AREA)
US14/095,145 2011-06-03 2013-12-03 Anchoring system between a concrete component and a steel component Abandoned US20140083044A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011105329A DE102011105329B4 (de) 2011-06-03 2011-06-03 Verbundbauteil und damit hergestellte Stahlbeton-Stahl-Struktur
DE102011105329.1 2011-06-03
PCT/EP2012/059349 WO2012163708A1 (fr) 2011-06-03 2012-05-21 Système d'ancrage entre un élément en béton et un élément en acier

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/059349 Continuation WO2012163708A1 (fr) 2011-06-03 2012-05-21 Système d'ancrage entre un élément en béton et un élément en acier

Publications (1)

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US20140083044A1 true US20140083044A1 (en) 2014-03-27

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US14/095,145 Abandoned US20140083044A1 (en) 2011-06-03 2013-12-03 Anchoring system between a concrete component and a steel component

Country Status (10)

Country Link
US (1) US20140083044A1 (fr)
EP (1) EP2715005B1 (fr)
JP (1) JP2014523982A (fr)
KR (1) KR20140043763A (fr)
CN (1) CN103688003A (fr)
BR (1) BR112013030775A2 (fr)
CA (1) CA2837389A1 (fr)
DE (1) DE102011105329B4 (fr)
WO (1) WO2012163708A1 (fr)
ZA (1) ZA201308246B (fr)

Cited By (1)

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US10837175B2 (en) * 2018-08-03 2020-11-17 Korea Institute Of Civil Engineering And Building Technology Textile-reinforced concrete structure using textile grid fixing apparatus and construction method for the same

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CN105952059B (zh) * 2016-07-05 2024-01-23 北京交通大学 一种替代高强钢筋弯钩的钢筋锚固方法
CN107170488B (zh) * 2017-05-24 2019-05-21 安徽科创智慧知识产权服务有限公司 一种混凝土安全壳的待浇筑骨架
CN107170489B (zh) * 2017-05-24 2019-05-21 安徽科创智慧知识产权服务有限公司 反应堆混凝土安全壳的预应力管道排布结构

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ZA201308246B (en) 2014-09-25
JP2014523982A (ja) 2014-09-18
DE102011105329A1 (de) 2012-12-06
KR20140043763A (ko) 2014-04-10
CN103688003A (zh) 2014-03-26
CA2837389A1 (fr) 2012-12-06
EP2715005B1 (fr) 2015-01-07
BR112013030775A2 (pt) 2016-12-06
WO2012163708A1 (fr) 2012-12-06
DE102011105329B4 (de) 2013-06-27

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