EP0332954B1 - Corrosion proof metallic joining element - Google Patents

Corrosion proof metallic joining element Download PDF

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Publication number
EP0332954B1
EP0332954B1 EP89103786A EP89103786A EP0332954B1 EP 0332954 B1 EP0332954 B1 EP 0332954B1 EP 89103786 A EP89103786 A EP 89103786A EP 89103786 A EP89103786 A EP 89103786A EP 0332954 B1 EP0332954 B1 EP 0332954B1
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EP
European Patent Office
Prior art keywords
joining element
covering
building
elastomeric
hydraulicly
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EP89103786A
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German (de)
French (fr)
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EP0332954A1 (en
Inventor
René Käser
Rudolf Siegrist
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Proceq SA
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Proceq SA
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/003—Balconies; Decks
    • E04B1/0038—Anchoring devices specially adapted therefor with means for preventing cold bridging
    • 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

Definitions

  • the present invention relates to a connecting element with a metallic core for transmitting forces between a first part made of hydraulically setting material and a further assigned part of a building, the connecting element emerging from the building parts in a joint area and providing protection against corrosive influences from the outside has an envelope made of an elastomer, vulcanized onto the core and dimensioned so that it runs a little way into the hydraulically setting material, whereby the clamping point of the metallic core in the hydraulically setting material is moved around this piece into the interior of the structural part, wherein the elastomer sheathing in the area of the exit point of the connecting element from the structural part has a layer thickness in the millimeter range, so that displacements of the connecting element bending under load at the exit point from the elastomer sheathing be taken.
  • Such connecting elements are e.g. known from DE-A-34 46 006.
  • Cantilever panel connections e.g. the anchoring for balconies, loggias, parapets, attics and consoles or the anchoring of floor or ceiling parts are usually made with the help of continuous or interconnected metallic connecting elements.
  • these connecting elements can consist, for example, of the usual reinforcement elements, which are led out of the part to be anchored into the part of the building serving as anchoring base or vice versa.
  • these connecting elements can, however, also be specially designed to absorb compressive or bending moments. Such elements are then only provided at the transition point between the parts of the building to be connected and have the actual reinforcement nothing more to do; this is also the case when connection elements such as hooks or bolts have to be anchored.
  • the connecting elements were e.g. completely with an extremely thin protective coating of e.g. 60-80 microns thick coated as described in European Patent Application No. 0 189 890. Solutions are also known in which the reinforcement elements in the area of the entry point are provided with a protective metal coating (cf. DE-OS 37 02 677) or with a rubber pipe sleeve, as described in the aforementioned DE-A-34 46 006 .
  • the covering consists of an elastomer material, preferably an elastomer material used for bridge supports, such as chloroprene rubber (CR), ethylene-propylene rubber (EPDM) or butyl rubber (IIR).
  • CR chloroprene rubber
  • EPDM ethylene-propylene rubber
  • IIR butyl rubber
  • Such elastic, but at the same time hard and tough materials are also suitable for long-term use.
  • the transition from a protective coating with the smallest thickness to a coating with a thickness in the millimeter range from the material mentioned above offers the following advantages: the covering described is very tough and insensitive to the rough treatment on the construction site. In the joint itself, it acts as an absolute corrosion protection insofar as the corrosive influences are prevented from acting on the surface of the metallic connecting element.
  • the encapsulated covering also acts as a seal. Furthermore, the elastic covering reduces the risk of damage to the concrete in the event of a relative displacement due to temperature differences. This danger exists especially in balconies, which should be insulated as well as possible from the rest of the building.
  • the aforementioned relative displacement creates shear forces through which the connecting elements in the area of the entry point want to be inclined; The concrete is then expanded in a funnel-shaped or oval manner at the entry point of the connecting element over a longer period of time. This creates a crack in which corrosive media can penetrate.
  • the compressible and stretchable covering the risk of the entry point widening, as described above, is essentially eliminated and any expansion inside is placed behind the sealing area. This considerably increases the security against corrosion.
  • an elastomer is basically made with metal and / or e.g. Concrete is compatible; So there is no need to fear that additional, difficult to estimate electrochemical processes will take place.
  • Preferred embodiments have the features of dependent claims; in particular is the Provide formings on the outer surface of the casing for improved sealing effect against corrosive fluids.
  • Further preferred embodiments have features which ensure the adhesion of the covering to the connecting element even under the highest loads.
  • the use of an adhesion promoter with possibly prior galvanizing of the connecting element or the direct vulcanization of the covering onto the connecting element can result in the connecting element and covering being inseparably connected to one another and thus corrosion in the area of the Wrapping is completely excluded.
  • the connecting element can have any shape. Not only does the profile in cross-section play a role, changes in the length of the profile can also be provided.
  • 1 and 2 denote different parts of a building, in the present case both are made of concrete.
  • Part 1 can be used as a cantilever plate, e.g. Balcony, and part 2 as the corresponding anchoring part in the building.
  • the arrangement shown is symmetrical for simplicity; this is not mandatory.
  • the anchoring part 2 could also consist of e.g. consist of a steel girder or another part of a building, to which the connecting elements, instead of being poured into concrete as shown, are fastened and anchored in the usual professional manner.
  • the metal connecting elements used are, for example, a tension rod 3, a compression rod 4, which is each provided with a pressure-receiving plate 5, and an element 6 that can be subjected to bending to absorb bending moments.
  • the two building parts 1 and 2 are separated by the joints 7,7 '; Groove 7 schematically shows an insulating element or an element 8 that fulfills another function.
  • This lock is intended to prevent the penetrated, corrosive medium from reaching the unprotected areas of the connecting elements located in the structure.
  • This lock consists, for example, of a flange-shaped collar 11 which, as will be explained in more detail with reference to FIG.
  • barrier 11 has a sealing function and extends the path of the corrosive medium from the entry point 13 to the part of the connecting element which is at risk of corrosion.
  • the design of the barrier as a labyrinth 12 has the additional advantage that the penetration path for the corrosive medium is further extended and the sealing effect is multiplied; in the case of short connecting elements, such as connecting element 4, this can be advantageous.
  • the functioning of such barriers 11, 12 in the sealing is discussed in more detail in the description of FIG. 2.
  • the friction between the casing 10 and e.g. an insulation body 8 is enlarged. This is important because the insulation bodies required today tend to slip on the reinforcement that passes through them, and in turn there is a risk that problems will arise during installation on the construction site.
  • FIG. 2a and 2b show the situation under two different load conditions.
  • Fig. 2a a situation is shown, as it can be given with temperature-related relative displacement between the different parts of a building.
  • a part 2 (not shown in more detail) provided next to a hydraulically bound part 1 of a building is anchored to part 1 with the aid of a connecting element 4 which can be subjected to tension or pressure.
  • the arrow indicates the direction of the load acting on the connecting element.
  • the connecting element 4 is subject to a bend. While the casing 10 seals well on one side due to the increased pressure, a crack 13 has opened on the other side.
  • Fig. 2 b shows the simpler conditions with only tensile or compressive load.
  • the collar 11 presses against the material of part 1 on an annular surface and seals securely.
  • FIGS. 2a and 2b naturally also apply if, instead of the temperature-related stress between adjacent parts of a building, another load, uniform or alternating, acts.
  • the end of the connecting element projecting from the part consisting of hydraulically setting material can be provided with a hook for tensioning or other load cables.
  • the length of the covering in the relevant part of the structure made of hydraulically setting material corresponds at least to the usual covering of reinforcements in concrete.
  • the thickness of the cladding is preferably chosen so that the connecting element that bends under load does not rest on the material of the structural part surrounding the cladding. This means that the clamping point of the connecting element is moved inside the building part.
  • the thickness to be selected thus depends on the characteristics of the connecting element in the individual case, but is preferably in the range between 1 and 3 mm.

Abstract

The metallic joining element (3, 4, 6) possesses a sheath (10) which is composed of an elastomer and provides reliable protection against corrosive influences able to penetrate through the joint (7, 7') or the gaps (9). To prevent corrosive fluids from reaching the anchoring region of the metallic joining elements (3, 4, 6), also when under load, sealing shapes (11, 12) and (13) are provided. Using the sheath (10) according to the invention ensures that the corrosion protection is not damaged on the building site and survives the long periods of time common in the building trade in perfect condition. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Verbindungselement mit einem metallischen Kern zur Uebertragung von Kräften zwischen einem ersten Teil aus hydraulisch abbindendem Material und einem weiteren zugeordneten Teil eines Bauwerks, wobei das Verbindungselement in einem Fugenbereich aus den Bauwerksteilen austritt und zum Schutz gegen von aussen angreifende korrosive Einflüsse eine aus einem Elastomer bestehenden Umhüllung besitzt, die auf dem Kern aufvulkanisiert und so bemessen ist, dass sie ein Stück weit in das hydraulisch abbindende Material hinein verläuft, womit die Einspannstelle des metallischen Kerns im hydraulisch abbindenden Material um dieses Stück ins Innere des Bauwerkteils verlegt ist, wobei die Elastomer-Umhüllung im Bereich der Austrittstelle des Verbindungselementes aus dem Bauwerksteil eine Schicht-Dicke im Millimeterbereich besitzt, so dass Verschiebungen des sich unter Last biegenden Verbindungselementes bei der Austrittstelle von der Elastomer-Umhüllung aufgenommen werden.The present invention relates to a connecting element with a metallic core for transmitting forces between a first part made of hydraulically setting material and a further assigned part of a building, the connecting element emerging from the building parts in a joint area and providing protection against corrosive influences from the outside has an envelope made of an elastomer, vulcanized onto the core and dimensioned so that it runs a little way into the hydraulically setting material, whereby the clamping point of the metallic core in the hydraulically setting material is moved around this piece into the interior of the structural part, wherein the elastomer sheathing in the area of the exit point of the connecting element from the structural part has a layer thickness in the millimeter range, so that displacements of the connecting element bending under load at the exit point from the elastomer sheathing be taken.

Solche Verbindungselemente sind z.B. aus der DE-A-34 46 006 bekannt.Such connecting elements are e.g. known from DE-A-34 46 006.

Kragplattenanschlüsse, z.B. die Verankerung für Balkone, Loggien, Brüstungen, Attiken und Konsolen oder auch die Verankerung von Boden- bzw. Deckenteilen werden in der Regel mit Hilfe von durchgehenden oder miteinander verbundenen metallischen Verbindungselementen vorgenommen. Diese Verbindungselemente können bei Verwendung von Stahlbeton z.B. aus den üblichen Bewehrungselementen bestehen, welche aus dem zu verankernden Teil hinaus in den als Ankerungsgrund dienenden Gebäudeteil oder umgekehrt geführt werden. Je nach der aufzunehmenden Last können diese Verbindungselemente jedoch auch speziell zur Aufnahme von Druck- oder Biegemomenten ausgebildet werden. Solche Elemente werden dann nur an der Uebergangsstelle zwischen den zu verbindenden Teilen des Bauwerkes vorgesehen und haben mit der eigentlichen Bewehrung nichts mehr zu tun; dies ist auch dann der Fall, wenn Anschlusselemente wie Haken oder Bolzen verankert werden müssen.Cantilever panel connections, e.g. the anchoring for balconies, loggias, parapets, attics and consoles or the anchoring of floor or ceiling parts are usually made with the help of continuous or interconnected metallic connecting elements. When using reinforced concrete, these connecting elements can consist, for example, of the usual reinforcement elements, which are led out of the part to be anchored into the part of the building serving as anchoring base or vice versa. Depending on the load to be absorbed, these connecting elements can, however, also be specially designed to absorb compressive or bending moments. Such elements are then only provided at the transition point between the parts of the building to be connected and have the actual reinforcement nothing more to do; this is also the case when connection elements such as hooks or bolts have to be anchored.

In letzter Zeit wurde z.B. bei Balkonen dem Ort des Kragplattenanschlusses der Isolation vermehrte Aufmerksamkeit geschenkt. Spezielle Isolationselemente zwischen den zu verbindenden Teilen des Bauwerkes sollen helfen, Wärmebrücken zu vermeiden. Dabei entstehen natürlich wieder neue Fugen, durch welche Feuchtigkeit oder andere korrosive Medien zu den metallischen Verbindungselementen gelangen können.Recently, e.g. in balconies, more attention is paid to the location of the cantilever panel connection of the insulation. Special insulation elements between the parts of the building to be connected should help to avoid thermal bridges. This naturally creates new joints through which moisture or other corrosive media can reach the metallic connecting elements.

Zur Lösung dieses Korrosionsproblems wurden bisher verschiedene Versuche unternommen. Die Verbindungselemente wurden z.B. vollständig mit einem äusserst dünnen Schutzanstrich von z.B. 60-80 Mikrometer Dicke überzogen, wie in der Europäischen Patentanmeldung Nr. 0 189 890 beschrieben ist. Es sind auch Lösungen bekannt, bei welchen die Bewehrungselemente im Bereich der Eintrittstelle mit einem Metallschutzüberzug (vgl. DE-OS 37 02 677) oder mit einer Rohrmanschette aus Kautschuk versehen sind, wie dies in der erwähnten DE-A-34 46 006 beschrieben ist.Various attempts have been made to solve this corrosion problem. The connecting elements were e.g. completely with an extremely thin protective coating of e.g. 60-80 microns thick coated as described in European Patent Application No. 0 189 890. Solutions are also known in which the reinforcement elements in the area of the entry point are provided with a protective metal coating (cf. DE-OS 37 02 677) or with a rubber pipe sleeve, as described in the aforementioned DE-A-34 46 006 .

Bei allen diesen Lösungen ergeben sich jedoch Effekte, welche dem Schutzzweck abträglich sind. Dünne Schutzschichten sind auf dem Bau während der normalen Handhabung sehr gefährdet; eine Garantie für unverletzte Schutzschichten kann nicht übernommen werden. Aber auch im bereits fertiggestellten Gebäude ergeben sich Probleme: durch Relativverschiebungen, bedingt durch Temperaturunterschiede, wird der Schutzanstrich häufig an der Eintrittstelle in den jeweiligen Teil des Bauwerkes verletzt, so dass letztendlich auch bei sorgfältigster Handhabung auf dem Bau ein sicherer Korrosionsschutz fehlt. Ferner kann durch solche Verschiebungen der Beton an der Einspannstelle des Verbindungselementes weggesprengt werden oder Risse bekommen, so dass dort korrodierende Flüssigkeit zum metallischen Kern vordringen kann. Auch die Verwendung von rostfreien Metallschutzüberzügen verspricht keinen sicheren Korrosionsschutz. Im übrigen existiert ein schlechthin rostfreies Metall nicht; sicher ist nur, dass verschiedene Legierungen gegen bestimmte korrosive Angriffe erhöhten Widerstand bieten. Entstehende Haarrisse bzw. entstehender Lochfrass sind sehr schwer zu entdecken. Der nötige Kontrollaufwand ist unverhältnismässig gross.With all these solutions, however, there are effects which are detrimental to the protective purpose. Thin protective layers are very vulnerable to construction during normal handling; no guarantee can be given for undamaged protective layers. But problems also arise in the building that has already been completed: Relative displacements, due to temperature differences, often damage the protective coating at the point of entry into the respective part of the building, so that even with the most careful handling of the building, reliable corrosion protection is ultimately lacking. In addition, such displacements can cause the concrete to be blasted away at the clamping point of the connecting element or to develop cracks, so that corrosive liquid can penetrate to the metallic core there. The use of rustproof metal protective coatings also promises no safe corrosion protection. Otherwise, there is no such thing as a rustproof metal. the only thing that is certain is that various alloys offer increased resistance to certain corrosive attacks. Emerging hairline cracks or pitting are very difficult to detect. The necessary control effort is disproportionately large.

Die konventionellen Massnahmen bezüglich Korrosionsschutz von in Fugen frei geführten metallischen Verbindungselementen lassen insbesondere deshalb zu wünschen übrig, weil Gebäude eine sehr lange Lebensdauer haben und dadurch die Korrosion von Verbindungselementen langfristig erhalten werden muss.The conventional measures regarding corrosion protection of metal connecting elements freely guided in joints leave something to be desired, in particular because buildings have a very long lifespan and therefore the corrosion of connecting elements must be maintained over the long term.

Entsprechend ist es Aufgabe der vorliegenden Erfindung, für Bewehrungs- bzw. Verankerungs- oder Verbindungselemente einen Korrosionsschutz zu schaffen, welcher Sicherheit gegen Beschädigung auf der Baustelle sowie gegen Beschädigung durch Relativbewegungen von Gebäudeteilen im Bauwerk aufgrund von Temperaturschwankungen bietet. Dabei muss der Korrosionsschutz auch bei hochbelasteten, nur im Fugenbereich angeordneten Verbindungs- bzw. Verankerungselementen gewährleistet sein. Weiter muss der Korrosionsschutz auf alle Profile anwendbar sein, welche für die Aufnahme der jeweiligen Last eingesetzt werden müssen. Dabei muss die Wirkung über die langen, im Bauwesen üblichen Zeiträume aufrecht erhalten bleiben.Accordingly, it is an object of the present invention to provide corrosion protection for reinforcement or anchoring or connecting elements, which offers security against damage on the construction site and against damage due to relative movements of parts of the building in the building due to temperature fluctuations. Corrosion protection must also be ensured in the case of highly stressed connecting or anchoring elements that are only arranged in the joint area. Furthermore, the corrosion protection must be applicable to all profiles that have to be used to take up the respective load. The effect must be maintained over the long periods of time that are common in construction.

Erfindungsgemäss wird diese Aufgabe gelöst durch ein metallisches Verbindungselement mit den Merkmalen von Anspruch 1.According to the invention, this object is achieved by a metallic connecting element having the features of claim 1.

Die Umhüllung besteht aus einem Elastomer-Werkstoff, vorzugsweise einem für Brückenauflager verwendeten Elastomer-Werkstoff, wie z.B. Chloropren-Kautschuk (CR), Aethylen-Propylen-Kautschuk (EPDM) oder Butylkautschuk (IIR). Solche elastische, gleichzeitig aber harte und zähe Materialien eignen sich auch bei langfristigen Beanspruchungen. Der Uebergang von einem Schutzanstrich mit geringster Dicke zu einer Ummantelung mit einer Dicke im Millimeterbereich aus dem oben erwähnten Material bietet die folgenden Vorteile: die beschriebene Umhüllung ist sehr zäh und gegenüber der rauhen Behandlung auf der Baustelle unempfindlich. In der Fuge selbst wirkt sie als absoluter Korrosionsschutz insofern, als den korrosiven Einflüssen ein Einwirken auf die Oberfläche des metallischen Verbindungselementes verunmöglicht wird. An der Eintrittsstelle in den jeweiligen Teil des Bauwerkes wirkt die miteingegossene Umhüllung zusätzlich als Dichtung. Weiter vermindert die elastische Umhüllung die Gefahr der Beschädigung des Betons bei Relativverschiebung aufgrund von Temperaturdifferenzen. Diese Gefahr besteht vor allem bei Balkonen, welche gegenüber dem restlichen Bauwerk möglichst gut isoliert sein sollen. Durch die erwähnte Relativververschiebung entstehen Scherungskräfte, durch welche sich die Verbindungselemente im Bereich der Eintrittsstelle schräg stellen möchten; über einen längeren Zeitraum wird dann der Beton an der Eintrittsstelle des Verbindungselements trichterförmig oder oval aufgeweitet. Dadurch entsteht eine Ritze, in welche korrosionsfördernde Medien eindringen können. Durch die kompressible und dehnbare Umhüllung wird die Gefahr des Aufweitens der Eintrittsstelle, wie oben beschrieben, im wesentlichen eliminiert und eine eventuelle Aufweitung ins Innere hinter den abdichtenden Bereich verlegt. Dies erhöht die Sicherheit gegen Korrosion beträchtlich.The covering consists of an elastomer material, preferably an elastomer material used for bridge supports, such as chloroprene rubber (CR), ethylene-propylene rubber (EPDM) or butyl rubber (IIR). Such elastic, but at the same time hard and tough materials are also suitable for long-term use. The transition from a protective coating with the smallest thickness to a coating with a thickness in the millimeter range from the material mentioned above offers the following advantages: the covering described is very tough and insensitive to the rough treatment on the construction site. In the joint itself, it acts as an absolute corrosion protection insofar as the corrosive influences are prevented from acting on the surface of the metallic connecting element. At the point of entry into the respective part of the structure, the encapsulated covering also acts as a seal. Furthermore, the elastic covering reduces the risk of damage to the concrete in the event of a relative displacement due to temperature differences. This danger exists especially in balconies, which should be insulated as well as possible from the rest of the building. The aforementioned relative displacement creates shear forces through which the connecting elements in the area of the entry point want to be inclined; The concrete is then expanded in a funnel-shaped or oval manner at the entry point of the connecting element over a longer period of time. This creates a crack in which corrosive media can penetrate. As a result of the compressible and stretchable covering, the risk of the entry point widening, as described above, is essentially eliminated and any expansion inside is placed behind the sealing area. This considerably increases the security against corrosion.

Ein weiterer Vorteil besteht darin, dass ein Elastomer grundsätzlich mit Metall und/oder z.B. Beton verträglich ist; es muss also nicht befürchtet werden, dass zusätzliche, schwer abschätzbare elektrochemische Vorgänge stattfinden werden.Another advantage is that an elastomer is basically made with metal and / or e.g. Concrete is compatible; So there is no need to fear that additional, difficult to estimate electrochemical processes will take place.

Bevorzugte Ausführungsbeispiele besitzen die Merkmale von abhängigen Ansprüchen; insbesondere ist die Aussenfläche der Umhüllung für verbesserte Dichtwirkung gegenüber korrosiven Fluiden mit Ausformungen versehen.Preferred embodiments have the features of dependent claims; in particular is the Provide formings on the outer surface of the casing for improved sealing effect against corrosive fluids.

Damit bei Relativverschiebungen auf der druckentlasteten Seite des Verbindungselementes trotz der Elastizität der Umhüllung keine Ritze entsteht, in welcher korrosive Einflüsse wirksam werden können, ist im Endbereich der Umhüllung eine flanschartig umlaufende Erhebung vorgesehen. Die Wirkung dieser Erhebung wird nachstehend in den Figuren noch näher erläutert.So that there is no crevice in the case of relative displacements on the pressure-relieved side of the connecting element, despite the elasticity of the casing, in which corrosive influences can be effective, a flange-like elevation is provided in the end region of the casing. The effect of this survey is explained in more detail below in the figures.

Mehrere solche Erhebungen, z.B. hintereinander angeordnete Ringe, erzeugen eine entsprechende Mehrfachwirkung, welche die Sicherheit erhöht. In geeigneter Ausgestaltung besitzen sie die Wirkung einer Labyrinthdichtung herkömmlicher Natur gegen das Eindringen von Fluiden. Die konkrete Ausgestaltung dieser Erhebungen richtet sich nach dem Einzelfall bzw. der zu erwartenden Relativverschiebung des Verbindungselementes in seinem Teil des Bauwerkes. Wichtig ist, dass auf alle Fälle eventuell eindringende korrosive Fluide spätestens am Ende der Umhüllung gestoppt werden und nicht zum metallischen Verankerungsbereich der Verbindungselemente vordringen können. Diese Wirkung kann auch eine einfache Riffelung der Oberfläche der Umhüllung entfalten; nebst ihrer Wirkungen als Labyrinth erhöht sie dann auch die Haftung gegenüber Kunststoffteilen, wie z.B. Isolationskörpern.Several such surveys, e.g. Rings arranged one behind the other create a corresponding multiple effect, which increases safety. In a suitable embodiment, they have the effect of a labyrinth seal of a conventional nature against the penetration of fluids. The specific design of these surveys depends on the individual case or the expected relative displacement of the connecting element in its part of the building. It is important that any penetrating corrosive fluids are stopped at the end of the encapsulation at the latest and cannot penetrate to the metallic anchoring area of the connecting elements. This effect can also develop a simple corrugation of the surface of the casing; in addition to its effects as a labyrinth, it also increases the adhesion to plastic parts, e.g. Insulation bodies.

Weitere bevorzugte Ausführungsformen besitzen Merkmale, welche die Haftung der Umhüllung auf dem Verbindungselement auch bei höchsten Beanspruchungen sicherstellen. So kann z.B. die Verwendung eines Haftvermittlers mit eventuellem vorherigen Verzinken des Verbindungselementes oder das direkte Aufvulkanisieren der Umhüllung auf das Verbindungselement bewirken, dass Verbindungselement und Umhüllung untrennbar miteinander verbunden sind und damit Korrosion im Bereich der Umhüllung vollständig ausgeschlossen ist.Further preferred embodiments have features which ensure the adhesion of the covering to the connecting element even under the highest loads. For example, the use of an adhesion promoter with possibly prior galvanizing of the connecting element or the direct vulcanization of the covering onto the connecting element can result in the connecting element and covering being inseparably connected to one another and thus corrosion in the area of the Wrapping is completely excluded.

Speziell beim Aufvulkanisieren kann das Verbindungselement jede beliebige Form aufweisen. Es spielt nicht nur das Profil im Querschnitt eine Rolle, es können auch Veränderungen über die Länge des Profils vorgesehen werden.Especially when vulcanizing, the connecting element can have any shape. Not only does the profile in cross-section play a role, changes in the length of the profile can also be provided.

Die Erfindung wird anhand der Figuren noch etwas näher erläutert. Es zeigt:

  • Fig. 1 einen Querschnitt durch die Verbindungsstelle zweier Teile eines Bauwerkes,
  • Fig. 2a die Dichtwirkung der Umhüllung beim Auftreten von Scherungskräften;
  • Fig. 2b die Dichtwirkung der Umhüllung beim Auftreten von Zug- oder Druckkräften.
The invention is explained in more detail with reference to the figures. It shows:
  • 1 shows a cross section through the junction of two parts of a building,
  • 2a shows the sealing effect of the casing when shear forces occur;
  • Fig. 2b shows the sealing effect of the casing when tensile or compressive forces occur.

In Fig. 1 bezeichnen 1 und 2 verschiedene Teile eines Bauwerkes, im vorliegenden Fall bestehen beide aus Beton. Der Teil 1 kann dabei als Kragplatte, z.B. Balkon, aufgefasst werden und der Teil 2 als das entsprechende Verankerungsteil im Bauwerk. Die dargestellte Anordnung ist der Einfachheit halber symmetrisch aufgebaut; dies ist nicht zwingend. Der Verankerungsteil 2 könnte auch im gesamten aus z.B. einen Stahlträger oder einem sonstigen Teil eines Bauwerkes bestehen, an welchem die Verbindungselemente, statt wie dargestellt in Beton eingegossen, auf die übliche fachmännische Art und Weise befestigt und verankert sind.In Fig. 1, 1 and 2 denote different parts of a building, in the present case both are made of concrete. Part 1 can be used as a cantilever plate, e.g. Balcony, and part 2 as the corresponding anchoring part in the building. The arrangement shown is symmetrical for simplicity; this is not mandatory. The anchoring part 2 could also consist of e.g. consist of a steel girder or another part of a building, to which the connecting elements, instead of being poured into concrete as shown, are fastened and anchored in the usual professional manner.

Als metallische Verbindungselemente dienen in Fig. 1 beispielsweise ein Zugstab 3, ein Druckstab 4, welcher mit je einer Druckaufnahmeplatte 5 versehen ist, und ein auf Biegung beanspruchbares Element 6 zur Aufnahme von Biegemomenten. Die beiden Bauwerkteile 1 und 2 sind durch die Fugen 7,7′, voneinander getrennt; in Fuge 7 ist schematisch ein Isolierelement oder ein eine andere Funktion erfüllendes Element 8 eingezeichnet.In FIG. 1, the metal connecting elements used are, for example, a tension rod 3, a compression rod 4, which is each provided with a pressure-receiving plate 5, and an element 6 that can be subjected to bending to absorb bending moments. The two building parts 1 and 2 are separated by the joints 7,7 '; Groove 7 schematically shows an insulating element or an element 8 that fulfills another function.

Durch die Ritzen 9 bzw. durch die Fuge 7′ kann nun Feuchtigkeit oder ein anderes korrosives Medium eindringen. Die Umhüllung 10 verhindert einen Kontakt mit den korrosionsgefährdeten, metallischen Bereichen der Verbindungselemente 3,4,6. Da an der Eintrittsstelle des jeweiligen Verbindungselements in den Baukörper die Bildung von feinen Ritzen, durch welche das korrosive Medium eindringen kann, nicht zuverlässig auszuschliessen ist, wird mit Vorteil eine weitere Sperre vorgesehen. Diese Sperre soll verhindern, dass das eingedrungene, korrosive Medium an die im Baukörper liegenden, ungeschützten Bereiche der Verbindungselemente gelangt. Diese Sperre besteht beispielsweise aus einem flanschförmigen Kragen 11, der, wie anhand der Fig. 2 noch näher erläutert wird, Dichtungsfunktion hat und den Weg des korrosiven Mediums von der Eintrittsstelle 13 bis zum korrosionsgefährdeten Teil des Verbindungselements verlängert. Die Ausgestaltung der Sperre als Labyrinth 12 besitzt den zusätzlichen Vorteil, dass der Eindringweg für das korrosive Medium weiter verlängert und die Dichtungswirkung vervielfacht wird; bei kurzen Verbindungselementen, wie z.B. beim Verbindungselement 4, kann dies von Vorteil sein. Auf die Funktionsweise solcher Sperren 11,12 bei der Abdichtung wird in der Beschreibung zur Fig. 2 näher eingegangen.Through the cracks 9 or through the joint 7 ' can now penetrate moisture or another corrosive medium. The casing 10 prevents contact with the metallic areas of the connecting elements 3, 4, 6 which are at risk of corrosion. Since the formation of fine cracks through which the corrosive medium can penetrate cannot be reliably excluded at the point of entry of the respective connecting element into the structure, a further lock is advantageously provided. This lock is intended to prevent the penetrated, corrosive medium from reaching the unprotected areas of the connecting elements located in the structure. This lock consists, for example, of a flange-shaped collar 11 which, as will be explained in more detail with reference to FIG. 2, has a sealing function and extends the path of the corrosive medium from the entry point 13 to the part of the connecting element which is at risk of corrosion. The design of the barrier as a labyrinth 12 has the additional advantage that the penetration path for the corrosive medium is further extended and the sealing effect is multiplied; in the case of short connecting elements, such as connecting element 4, this can be advantageous. The functioning of such barriers 11, 12 in the sealing is discussed in more detail in the description of FIG. 2.

Auch eine Riffelung 18, wie sie als weiteres Beispiel einer Sperre der genannten Art vorgesehen sein kann, wirkt als Labyrinth. Zusätzlich ist dabei der Vorteil gegeben, dass durch solch eine Riffelung die Reibung zwischen Umhüllung 10 und z.B. einem Isolationskörper 8 vergrössert wird. Dies ist darum wichtig, weil die heute benötigten Isolationskörper auf der durch sie hindurchgehenden Armierung zum Rutschen neigen und damit wiederum die Gefahr besteht, dass beim Einbau auf der Baustelle Probleme entstehen.A corrugation 18, as can be provided as a further example of a lock of the type mentioned, acts as a labyrinth. In addition, there is the advantage that the friction between the casing 10 and e.g. an insulation body 8 is enlarged. This is important because the insulation bodies required today tend to slip on the reinforcement that passes through them, and in turn there is a risk that problems will arise during installation on the construction site.

Die Fig. 2a und 2b zeigen die Verhältnisse unter zwei verschiedenen Lastzuständen. In Fig. 2a ist eine Situation dargestellt, wie sie bei temperaturbedingter Relativverschiebung zwischen den verschiedenen Teilen eines Bauwerkes gegeben sein kann. Ein neben einem hydraulisch abgebundenen Teil 1 eines Bauwerks vorgesehenes Teil 2 (nicht näher dargestellt) ist mit Hilfe eines auf Zug oder Druck beanspruchbaren Verbindungselementes 4 am Teil 1 verankert. Der Pfeil gibt die Richtung der am Verbindungselement wirkenden Last an. Durch diese Beanspruchung unterliegt das Verbindungselement 4 einer Biegung. Während die Umhüllung 10 an der einen Seite durch den erhöhten Druck gut dichtet, hat sich an der anderen Seite eine Ritze 13 geöffnet. Durch die Biegeverformung des Verbindungselements 4 wird nun aber der entsprechende Flansch 11 über einen Teil 11′ seines Umfangs an der Vorderseite 14 fest angedrückt, derart, dass vollständige Dichtung trotz der offenen Ritze 13 gewährleistet ist. Ueber den gegenüberliegenden Teil 11˝ seines Umfangs tritt eine erhöhte Dichtwirkung an der Hinterseite 15 auf.2a and 2b show the situation under two different load conditions. In Fig. 2a a situation is shown, as it can be given with temperature-related relative displacement between the different parts of a building. A part 2 (not shown in more detail) provided next to a hydraulically bound part 1 of a building is anchored to part 1 with the aid of a connecting element 4 which can be subjected to tension or pressure. The arrow indicates the direction of the load acting on the connecting element. As a result of this stress, the connecting element 4 is subject to a bend. While the casing 10 seals well on one side due to the increased pressure, a crack 13 has opened on the other side. Due to the bending deformation of the connecting element 4, however, the corresponding flange 11 is now pressed firmly over a part 11 'of its circumference on the front side 14 in such a way that complete sealing is ensured despite the open crack 13. An increased sealing effect occurs on the rear side 15 via the opposite part 11 tritt of its circumference.

Im Bereich zwischen den beiden extremen Umfangssstellen 11′ und 11˝ bleibt der Flansch im wesentlichen unverformt und stellt damit auch dort eine Dichtung sicher. An Fig. 2a ist ferner die bereits erwähnte Vermeidung einer Beschädigung des Betons an der Eintrittsstelle des Verbindungselements 4 ersichtlich. Durch die Elastizität der Umhüllung wird ein Aufweiten dieser Eintrittsstelle durch die Wirkung des Verbindungselements vermieden. Dies trägt seinerseits dazu bei, das Eindringen von korrosiven Medien zu erschweren.In the area between the two extreme circumferential points 11 'and 11˝, the flange remains essentially undeformed and thus also ensures a seal there. 2a also shows the already mentioned avoidance of damage to the concrete at the entry point of the connecting element 4. The elasticity of the sheathing prevents the entry point from expanding due to the action of the connecting element. For its part, this contributes to making it more difficult for corrosive media to penetrate.

Fig. 2 b zeigt die einfacheren Verhältnisse bei nur Zug- oder Druckbelastung. Der Kragen 11 presst sich auf einer ringförmigen Fläche an das Material von Teil 1 an und dichtet sicher ab.Fig. 2 b shows the simpler conditions with only tensile or compressive load. The collar 11 presses against the material of part 1 on an annular surface and seals securely.

Die in Fig. 2a und 2b dargestellten Verhältnisse gelten natürlich auch dann, wenn anstelle der temperaturbedingten Beanspruchung zwischen benachbarten Teilen eines Bauwerks eine weitere Last, gleichförmig oder wechselnd, angreift. Z.B. kann das aus dem aus hydrau- lisch abbindenden Material bestehenden Teil herausragende Ende des Verbindungselement mit einem Haken für Spann- oder sonstige Lastseile versehen sein.The conditions shown in FIGS. 2a and 2b naturally also apply if, instead of the temperature-related stress between adjacent parts of a building, another load, uniform or alternating, acts. E.g. the end of the connecting element projecting from the part consisting of hydraulically setting material can be provided with a hook for tensioning or other load cables.

Auf die beschriebene Weise gelingt es, korrosive Einflüsse bei wechselnden Belastungen bzw. Verformungen vom metallischen Verbindungselement fernzuhalten. Die Länge der Umhüllung im betreffenden Teil des Bauwerks aus hydraulisch abbindendem Material entspricht mindestens der üblichen Ueberdeckung von Armierungen in Beton. Die Dicke der Umhüllung wird vorzugsweise so gewählt, dass das unter Last sich biegende Verbindungselement nicht auf dem die Umhüllung umgebenden Material des Bauwerkteils aufsitzt. Dies bedeutet, dass die Einspannstelle des Verbindungselements ins Innere des Bauwerkteils verlegt ist. Die zu wählende Dicke hängt damit von den Charakteristiken des Verbindungselements im Einzelfall ab, liegt aber vorzugsweise im Bereich zwischen 1 und 3 mm.In the manner described, it is possible to keep corrosive influences away from the metallic connecting element in the event of changing loads or deformations. The length of the covering in the relevant part of the structure made of hydraulically setting material corresponds at least to the usual covering of reinforcements in concrete. The thickness of the cladding is preferably chosen so that the connecting element that bends under load does not rest on the material of the structural part surrounding the cladding. This means that the clamping point of the connecting element is moved inside the building part. The thickness to be selected thus depends on the characteristics of the connecting element in the individual case, but is preferably in the range between 1 and 3 mm.

Claims (7)

1. Joining element having a metallic core (3; 4; 6) for transferring forces between a first part (1) made of hydraulicly setting material and another, coordinated part (2) of a building, wherein the joining element in a joint spacing zone (7, 7′) emerges from the parts of the building and for protection against external corrosive influences comprises an elastomeric covering (10) vulcanized onto the core and being sized to have a portion extending into the hydraulicly setting material (1), whereby the point of fixation of the metallic core (3; 4; 6) in the hydraulicly setting material is displaced into the interior of the part of the building by said portion, the elastomeric covering (10) having a thickness in the range of millimeters at the place where the joining element emerges from the building part, such that displacements of the joining element bent under load are absorbed by the elastomeric covering at said place, characterized in that the elastomeric covering (10) at the point of fixation ends with an elastically deformable dish-like, annular flange and in that between said annular flange and said place where the joining element emerges several circular projections or grooves (12; 18) are provided which together form a labyrinth sealing.
2. Joining element of claim 1, characterized in that the projections or grooves are provided in the form of a corrugation (18) of the surface of the covering.
3. Joining element of one of the claims 1 or 2, characterized in that at least the surface portions of the metallic core (3; 4; 6) are covered by the covering (10) of elastomeric material are galvanized.
4. Joining element of one of the claims 1 to 3 characterized in that the covering (10) of elastomeric material and the metallic body (3; 4; 6) of the joining element are inseparably connected by means of an adhesion promoter.
5. Joining element of one of the claims 1 to 4, characterized in that the thickness of the covering (10) of elastomeric material substantially is between 1 and 3 mm.
6. Joining element of one of the preceding claims, characterized in that the covering (10) of elastomeric material is provided so that in the mounted condition its length within the building of hydraulicly setting material (2) at least corresponds to the standard overhead cover of reinforcements in concrete.
7. Joining element of one of the preceding claims, characterized in that the covering (10) consists of a synthetic rubber.
EP89103786A 1988-03-18 1989-03-03 Corrosion proof metallic joining element Expired - Lifetime EP0332954B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103786T ATE79430T1 (en) 1988-03-18 1989-03-03 ANTI-CORROSION METALLIC CONNECTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1029/88 1988-03-18
CH1029/88A CH674752A5 (en) 1988-03-18 1988-03-18

Publications (2)

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EP0332954A1 EP0332954A1 (en) 1989-09-20
EP0332954B1 true EP0332954B1 (en) 1992-08-12

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Application Number Title Priority Date Filing Date
EP89103786A Expired - Lifetime EP0332954B1 (en) 1988-03-18 1989-03-03 Corrosion proof metallic joining element

Country Status (4)

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EP (1) EP0332954B1 (en)
AT (1) ATE79430T1 (en)
CH (1) CH674752A5 (en)
DE (1) DE58902014D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4020582A1 (en) * 1989-07-20 1991-01-24 Schoeck Bauteile Gmbh COMPONENT FOR THERMAL INSULATION IN BUILDINGS
CH681031A5 (en) * 1990-02-12 1992-12-31 Stadler Heerbrugg Holding Ag
FR2674875B1 (en) * 1991-04-05 1993-06-25 Scetauroute CONNECTION STRUCTURE BETWEEN TWO PARTS, SEPARATED BY A EXPANSION JOINT, FROM AN ASSEMBLY CONSTITUTING A LONG LENGTH BEAM, FOR EXAMPLE A BRIDGE APRON.
ATE151836T1 (en) * 1991-02-15 1997-05-15 Reto Bonomo THERMAL INSULATING CRAFT PLATE CONNECTION ELEMENT AND USE THEREOF
DE19519613C2 (en) * 1995-05-29 2000-04-13 Sfs Handels Holding Ag Heerbru Cantilever and / or joint element for reinforced building constructions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2312293A (en) * 1939-05-09 1943-02-23 George C Weiss Structural element
DE3446006A1 (en) * 1984-12-17 1986-07-03 Wayss & Freytag Ag, 6000 Frankfurt Corrosion-protected reinforcing bar for bridging planned structural joints
DE3503276A1 (en) * 1985-01-31 1986-08-07 Wacker-Chemie GmbH, 8000 München REINFORCEMENT ELEMENTS PROTECTED BY CORROSION AGAINST CORROSION OR IN PORO CONCRETE
DE3702677A1 (en) * 1986-02-07 1987-08-13 Riss Ag Reinforcing member and process for the production thereof

Also Published As

Publication number Publication date
EP0332954A1 (en) 1989-09-20
ATE79430T1 (en) 1992-08-15
DE58902014D1 (en) 1992-09-17
CH674752A5 (en) 1990-07-13

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