EP0307427A1 - Armature pour constructions en beton. - Google Patents

Armature pour constructions en beton.

Info

Publication number
EP0307427A1
EP0307427A1 EP19880902382 EP88902382A EP0307427A1 EP 0307427 A1 EP0307427 A1 EP 0307427A1 EP 19880902382 EP19880902382 EP 19880902382 EP 88902382 A EP88902382 A EP 88902382A EP 0307427 A1 EP0307427 A1 EP 0307427A1
Authority
EP
European Patent Office
Prior art keywords
concrete
chain
reinforcement according
chains
links
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.)
Granted
Application number
EP19880902382
Other languages
German (de)
English (en)
Other versions
EP0307427B1 (fr
Inventor
Walter Nill
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT88902382T priority Critical patent/ATE61837T1/de
Publication of EP0307427A1 publication Critical patent/EP0307427A1/fr
Application granted granted Critical
Publication of EP0307427B1 publication Critical patent/EP0307427B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance

Definitions

  • the present invention relates to reinforcement for concrete structures.
  • Concrete has a high compressive strength and is only limited to tension, i.e. about 10% of the compressive strength, resilient.
  • the tensile and shear forces are therefore taken up by so-called reinforcing irons, usually with a circular cross-section, around which concrete is poured.
  • These are essentially tie rods that, when connected to each other and the concrete, form a force-absorbing structure.
  • These tie rods must be cut to length before pouring.
  • the rods have to be bent or welded in a complex manner in order to satisfy a complicated spatial geometry.
  • the tensile strength of the concrete structure is guaranteed by a complex combination of bars and brackets in the concrete. Subsequent extensions or reinforcements and repairs are very complex. Powerful connections of crossing reinforcing bars are difficult to achieve. Mutual welding is complex and problematic.
  • connection between the reinforcing bars, usually with a round cross-section and possibly with ribs or beads on their surface, takes place by means of static friction.
  • Anchoring can only be achieved by bending the ends of the reinforcing bars.
  • the anchorage length of the armie The reinforcement elements must be a multiple of their diameter in order to be able to transmit the tensile forces in the reinforcement elements to the concrete.
  • the object of the invention is to provide a reinforcing element which takes over the tensile forces in concrete structures at short intervals with force, can be easily cast and handled, and which does not show the disadvantages of conventional elements mentioned.
  • Chains can be designed in any geometric shape and connected to each other.
  • the course of the chains can be chosen to coincide spatially with the course of the traction lines.
  • Complex geometric structures can easily be made tensile by means of cast-in chains with one or more dimensions, the connection of the individual chains is simple and secure.
  • Chains are easy to transport and can be made in any length. Shackles and other known elements or also weldings can be used as connecting links for series as well as for parallel and crossed arrangement of chains. Chains can be used as the only tension elements in a concrete construction or they can be used as a supplement to a conventional reinforced concrete construction. Chains can also be expanded into flat or spatial structures by connecting more than two links per chain link.
  • the concrete reinforcement chains are fastened in a formwork in the same way as concrete iron and loosely inserted, tensioned or pre-stressed before the concrete is poured.
  • the chains can also be led out of the concrete or form what are known as Gerber support joints.
  • an auxiliary construction can be removed or it can remain in the concrete and the chains take over the task of transmitting the tensile and shear forces in the construction.
  • the chains are always tensioned or pre-tensioned so that all links are in metallic contact with each other.
  • the cast-in chains show flexibility by twisting the chain in the longitudinal axis of the construction due to the positive connection with the concrete or other cast materials in the context of their expansion. This can have an advantageous effect in the event of a shock load or permanent vibrations.
  • the reinforcements can be put together in the desired spatial shape by mutually connecting several chain links. Naturally, aids are required for complicated spatial arrangements with which the chains are held until the concrete hardens. By welding, mechanical fasteners, gluing, etc. a pure chain structure can be created to maintain shape without external help, which is then encased in concrete. Such prefabricated reinforcements of this type can be inserted directly into the formwork and do not have to be held by means of supports.
  • chain links with a circular shape several links can be attached to a single link without changing the geometry of the contact surfaces. The chain link then serves as the node of several chain strands.
  • the chains can also be easily added to the concrete in the form of short sections. If they are also designed as hollow bodies and they have the same specific weight as the concrete, this results in an even statistical distribution. For this purpose, either cavities are provided or the chains are made of an appropriate material. If the cavities are also filled with appropriate materials, atomic-physical effects with regard to shielding or mechanical destruction etc. can also be achieved.
  • chains can be used largely independently of the geometry of the construction, and even a certain articulation effect is possible when overloaded. Reinforcements for pressure vessels in spherical or barrel form, hanging roofs and membrane-shaped plates can be easily created.
  • the chains can easily be connected to one another by shackles, screw links or welded links.
  • the chain links can also be connected with three, four or more further links in the form of a chain mail.
  • the chain links are preferably circular. Such tensile members retain their strength when the tensile load is applied by the concrete filling the gaps.
  • the chains can be laid in the concrete formwork in the conventional way with underlay blocks, suspensions or by nailing.
  • the chains can be pretensioned in a conventional manner.
  • the chains can also be slack (loose) or slightly tensioned, e.g. be inserted by their own weight.
  • FIG. 1 shows a partially cutaway view of a concrete structure with a cast chain
  • FIG. 2 shows a concrete beam with two cast chains
  • FIG. 3 shows a pillar with conventional reinforcement and a connection with a chain as reinforcement, which is cast onto the pillar at the same time or subsequently,
  • FIG. 4 shows a steel plate suspended from reinforcement chains
  • FIG. 5 shows a spatially curved concrete structure reinforced with chains
  • FIG. 6 shows an endless chain concreted into a slab with a circumferential pull
  • FIGS. 7-9 each have a chain link of special design to increase the transmission forces to the concrete
  • FIG. 10 two chain links with a rectangular cross-sectional and longitudinal sectional area
  • 11a shows a section through the support or contact area of two chain links in a further embodiment
  • FIG. 13 shows a section through the support or contact area of two chain links
  • FIG. 14 chains looped in a rope
  • FIG. 15 chains connected in a Y shape
  • Figure 16 planar or spatially connected chain links
  • Figure 17-19 shows a representation of the composite surfaces of the concrete portion that participates directly in the power transmission.
  • a chain 1 consisting of chain links 2 lined up in a known manner is inserted into the concrete 3 of a component. If the chain has been tensioned or pretensioned, the individual chain links 2 bear against one another in a form-fitting manner (FIG. 1).
  • the chains 1, like the conventional rod-shaped reinforcing bars, are inserted into the structure at the points of the structure which are subject to tension. In the case of a concrete construction according to FIG. 2 lying on two pillars 4, the chains 1 are inserted on the tension side of the construction.
  • a plurality of chains 1 can be used in parallel at a mutual distance, adjacent to one another or as a bundle rotated like a rope.
  • chain 1 a structure from a single or a plurality of interconnected chains 1.
  • FIG. 3 shows a pillar with vertically running, conventional reinforcing bars 5 with a laterally protruding concrete cover, e.g. for a crane runway which is non-positively connected by an endless chain 1 which wraps the rods 5 once or several times.
  • the chain 1 can be inserted loosely or welded to the rods 5.
  • the side concrete support can also be retrofitted to an existing beam.
  • a steel plate 10 is connected by four chains 1 to a concrete structure, not shown in the figure.
  • the chains 1 can be inserted into the concrete in such a way that the flow of forces is optimal, i.e. can run along the chains 1.
  • the chains 1 can also be led out of the plate 10. Instead of individual chains, chain strands can also be used here.
  • the ends of the chains running from the column to the upper end thereof are connected to an endless chain 1 connected to form a ring.
  • the chains 1 can simply be inserted into them and also optimally follow the flow of forces.
  • Other chains 1 can be inserted in a spiral, helical shape, or as self-contained rings or even criss-cross or intersecting.
  • an endless chain 1 reinforces and increases the circumferential projection of the concrete structure 3 Resilience to train on its circumference.
  • chain links 2 are shown in FIGS. 7-9, which are provided, for example, with lateral slats 6, ribs 7 or wavy ribs 8.
  • the grain mix of the concrete should have a sufficient proportion of grain below the clear chain opening cross-section. Furthermore, a sufficiently large proportion of the concrete aggregate is necessary, which serves to fill the spaces between the mutually facing sections of the chains which are subjected to pressure and form the space bodies 20.
  • the sieve curve of the concrete is preferably adapted to the size and the geometry of the chain links 2, so that the gaps that form are optimally filled.
  • the geometry of the surfaces at the contact points can be designed such that the projected contact surface is as large as possible.
  • a saddle-shaped cross-sectional area is selected in FIG. 10, so that the projection of the support surface 9 is essentially rectangular and is many times larger than in the case of a conventional chain 1, in which the two chain links 2 lie one on top of the other essentially at points.
  • Chain profiles with a point-like contact surface result in disadvantageous shearing of the concrete in the gaps.
  • FIGS. 11 and 12 show two further cross-sectional shapes of chain links 2 which ensure a flat contact area both in the case of straight chain links 2 and in the case of a slightly curved arrangement.
  • the radius R1 of the chain profile is designed equal to the inner chain link bend (Fig. 12), or a flat profile is used to manufacture the chain links 2 (Fig. 11).
  • the chain link 2 is preferably of circular design, so that the Contact areas have the same geometric shape in every position and the lines of force converge at a point.
  • a rib 15 is attached to the inside of the chain links 2, which enables an intermediate layer of concrete to be formed between the chain links 2 lying against one another, which transmits the pressure.
  • an inserted rib made of metal or another material can also occur, or the cross section of the chain link 2 can be polygonal (see the dash-dotted variant in FIG. 12). This makes it possible to use a chain that is not tensioned, e.g. through careless laying, placing concrete between the pressure surfaces that absorbs the pressure to be transferred.
  • FIG. 13 shows a cross section of the intermediate body 20 as it is when two chain links 2 do not lie snugly against one another and consequently there is no metallic mutual contact.
  • the distance s between the chain links 2 is to be dimensioned such that the space 20 can be filled up by the concrete used.
  • the radii R1 and R2 are approximately the same with a small thickness d of the intermediate body 20, but differ from one another to an extent with increasing thickness d, so that the chain links 2 must have corresponding bending radii in order to include an intermediate body 20 to obtain a substantially constant thickness d. If the radii R1 and R2 are not adapted to the distance between the two contact surfaces, wedge-shaped space bodies 20 are formed, the strength of which is low because there is not pure compressive stress.
  • the tension or pretension in a chain 1 or more pa rallelen as a bundle, which are held in the necessary places, can be done in a simple manner by twisting ("Reitein"). After the concrete has hardened, twisting and thus tension is maintained.
  • Chain sections can also be added to the concrete 3 during mixing and can be distributed in this way in a spatially, statistically, positionally or otherwise acting manner.
  • the specific density of such chains 1 preferably corresponds to that of concrete 3. This is achieved by appropriate choice of material or by chain links 2 made of tubular material having honing spaces.
  • FIG. 14 schematically shows chain links 2, which are joined to form a flat structure (chain armor).
  • the composite surfaces 22 are shown schematically, which interact directly with the chain links 2 and participate in the transmission of forces.
  • the force F1 acting on the chain link 2 in FIG. 17 is transmitted to the concrete 3 by the subsequent chain link 2 with its shoulders 24 and the composite surface 22 lying in the link opening.
  • concrete 3 instead of concrete 3 as investment material, other materials such as plastics or rubber can of course also be used. Particularly in the case of rubber, of course, completely different areas of application open up, in particular if the individual chain links 2 are not in metallic contact against each other and, as a result, the reinforcement only comes into play after a predeterminable expansion path under load.

Landscapes

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

Abstract

Afin de renforcer des constructions en béton, on y introduit des chaînes (1) qui peuvent avoir n'importe quelle longueur et sont faciles à utiliser. Elles peuvent également être reliées à des éléments conventionnels d'armature en forme de barres.
EP19880902382 1987-03-26 1988-03-28 Armature pour constructions en beton Expired - Lifetime EP0307427B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88902382T ATE61837T1 (de) 1987-03-26 1988-03-28 Armierung fuer betonkonstruktionen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1161/87 1987-03-26
CH116187 1987-03-26

Publications (2)

Publication Number Publication Date
EP0307427A1 true EP0307427A1 (fr) 1989-03-22
EP0307427B1 EP0307427B1 (fr) 1991-03-20

Family

ID=4203904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880902382 Expired - Lifetime EP0307427B1 (fr) 1987-03-26 1988-03-28 Armature pour constructions en beton

Country Status (2)

Country Link
EP (1) EP0307427B1 (fr)
WO (1) WO1988007613A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE539227C2 (sv) * 2013-02-18 2017-05-23 Svensk Cellarmering Fabrik Ab Armeringselement för gjutning och armeringsanordning innefattande sådana armeringselement
WO2020023999A1 (fr) * 2018-08-01 2020-02-06 John Silva Élément d'armature de béton
CN110886433B (zh) * 2019-12-02 2024-10-15 上海绿地建设(集团)有限公司 一种异形柱加固龙骨结构
CN114959535B (zh) * 2022-05-23 2023-10-20 河北华熙管业有限公司 一种管材镀锌装置及工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR52656E (fr) * 1942-12-31 1945-05-16 Armature métallique pour constructions en béton armé
DE1271011B (de) * 1964-01-17 1968-06-20 British Ceramic Res Ass Gebrannter oder getrockneter, tonhaltiger Gegenstand mit Metallverstaerkung und Verfahren zur Herstellung dieses Gegenstandes
FR2270410A1 (en) * 1974-03-05 1975-12-05 Vigliano Marcel Steel reinforcement for concrete slabs - has side by side coils with turns interconnected, overlapping or tangential
DE3120427C2 (de) * 1981-05-22 1985-10-24 Rösler Draht AG, 4056 Schwalmtal Bewehrung für die Betondeckung von Stahlbeton- oder Spannbetonteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8807613A1 *

Also Published As

Publication number Publication date
WO1988007613A1 (fr) 1988-10-06
EP0307427B1 (fr) 1991-03-20

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