EP2744955A2 - Device and method for the transition between a steel tower section and a pre-stressed concrete tower section - Google Patents

Device and method for the transition between a steel tower section and a pre-stressed concrete tower section

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Publication number
EP2744955A2
EP2744955A2 EP12724559.5A EP12724559A EP2744955A2 EP 2744955 A2 EP2744955 A2 EP 2744955A2 EP 12724559 A EP12724559 A EP 12724559A EP 2744955 A2 EP2744955 A2 EP 2744955A2
Authority
EP
European Patent Office
Prior art keywords
component
tower section
steel
section
tendons
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
EP12724559.5A
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German (de)
French (fr)
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EP2744955B1 (en
Inventor
Xiaofeng Tang
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Ed Zueblin AG
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Ed Zueblin AG
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Publication of EP2744955A2 publication Critical patent/EP2744955A2/en
Application granted granted Critical
Publication of EP2744955B1 publication Critical patent/EP2744955B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/08—Structures made of specified materials of metal
    • E04H12/085—Details of flanges for tubular masts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/08—Structures made of specified materials of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/16—Prestressed structures

Definitions

  • the present invention relates to a connection between two construction sections of a tower - preferably a tower of a wind turbine - with each other.
  • the coupling point is the transition between a generally prestressed reinforced concrete tower section and the rising steel structure.
  • Wind turbine towers with tower sections made of different materials are also referred to as hybrid towers.
  • the lower section of concrete may consist of prefabricated concrete elements that are joined together, or of a monolithic concrete component.
  • the construction section made of concrete material is often preloaded. This is done by means of tendons freely accessible in the tower interior or by means of tendons, which lie within the concrete cross-section and are cast after preloading. By casting the cavity between the tendon and cladding tube with an alkaline potting the tendon is particularly well protected against corrosion.
  • the position of the tendon in the concrete cross section allows a centric biasing force with respect to the heavy line of the concrete cross section; There are no additional bending loads.
  • the rising tower section made of steel may consist of several tubular tower segments, which are either made in one piece or consist of several joined segments over the circumference of the section. Centric stress conditions also prevail in this steel ring cross section.
  • the upper Tower section made of high-strength, age-resistant plastic - for example, glass fiber amplifier plastic - be made.
  • the patent DE 102 30 273 B3 describes an annular adapter element made of steel, which has bores through which the tendons are guided out of the lower concrete tower section. Above the adapter element, the tendons are anchored, so that there is a firm connection between the adapter element and prestressed concrete. At the upper end of the adapter element is a flange construction, to which the rising steel structure is connected. Due to the design, an offset of the load transfer occurs in the adapter ring, since the tendon anchoring lies outside the rising wall.
  • an annular head beam is arranged at the upper end of the concrete tower segment, through which the free tendons lying in the tower interior are guided and anchored.
  • the rising steel structure has a one-sided flange. Through the head bar extends an inclined bore through which anchoring bolts are guided. These connect steel flange and concrete component and are each fastened with two nuts. This solution allows the replacement of the anchor bolt, but also here creates an offset in the line of action of the vertical forces.
  • DE 10 2004 017 006 A1 describes an anchoring construction, the lower component of which - a steel plate anchored through - is cast in the concrete of the tower shaft or of the foundation.
  • the structure of the construction is symmetrical: in the rising steel component a symmetrical, T-shaped flange is arranged, through which an anchor rod is guided on both sides of the web and fastened with a nut.
  • these can indeed be guided in the concrete cross-section and subsequently potted, however, the final anchoring of the Tendon in concrete cross-section laterally next to the anchorage of the rising steel segment.
  • a widening of the concrete cross section is necessary.
  • an L-shaped, one-sided flange can be formed on the rising steel segment. This is placed on the upper end of the concrete component and anchored directly from the tendon. Because of the high forces occurring and the offset between normal stresses in the steel ring and the load introduction of the preload force, the flange must be made very thick. In addition, it is also necessary in this design for geometric reasons that the concrete cross-section is widened - and that the tendon is warped out of its axis out to the final anchorage out. Due to the curvature of the tendon arise in this construction deflection forces that must also be included in the concrete section.
  • the object of the invention is to provide a transitional structure for a hybrid tower - with an upper tower section made of steel or glass fiber reinforced plastic and a lower section of prestressed concrete - which withstands the high dynamic effects, is compact and economical and the establishment of the Tower simplified.
  • the invention provides a prefabricated annular or ringsegment- shaped component made of steel - or alternatively made of glass fiber reinforced plastic (GRP) - as a transition element.
  • GRP glass fiber reinforced plastic
  • This has in cross section the shape of an inverted Ts with a vertically arranged web, which represents the transition to the rising cross section of the upper tower section.
  • the web In the flange in the ring direction at a defined distance from each other in the middle recessed gene through which the tendons of the prestressed concrete tower section are performed.
  • the web is preferably recessed in rounded form so as to reduce stress concentrations so that the anchor heads of the tendons can be accommodated.
  • the tendons are threaded through the recesses in the component according to the invention.
  • the transition element is aligned in its final position on the upper edge of the reinforced concrete tower section and potted with non-positive grout.
  • push knobs are arranged in an alternative embodiment below the flange, which are introduced into previously prepared depressions in the concrete.
  • the anchor heads are installed and applied a defined biasing force.
  • the anchor heads are fixed, ie the tendons are wedged and the cladding tubes of the tendons filled with - preferably alkaline - injection material.
  • Anchor head attached this can be done demountable, so that a check of the anchor heads in the course of maintenance is possible at any time.
  • the transition element is connected directly to the reinforced concrete shaft. An additional installation for anchoring or attachment of the steel tower section on the prestressed concrete tower section is not necessary.
  • the transition element is ring segment-shaped and having at least one further or, for example, two or three or more, in particular identically shaped, ring-segment-shaped transition components connectable to a closed ring.
  • the interconnected segments together form an annular transition element.
  • Fig. 1 shows schematically a partial view of the tower - preferably the tower of a wind turbine - with the transition point between rising steel tower section 6 and lower prestressed concrete tower section. 7
  • the transitional component 1 according to the invention is shown in detail in the installed state.
  • recesses 3 are arranged accurately to the position of the tendons 8.
  • the web 4 is provided with a recess 5.
  • the flaccid tensioning element 8 is guided in the flange 2 during the assembly of the component 1 by the cutouts 3.
  • the mortar bed 1 1 between component 1 and lower tower section made of concrete 7 with grout 1 1 is filled.
  • the anchor head 10 can be mounted in the recess 5 provided in the web 4:
  • the tendon strands 9 are guided by the anchor head 10 and secured with wedges.
  • the pre-clamping force is applied by means of pressing at the lower end of the tendons.
  • Fig. 3 shows a cross section through the transition point, which lies between two tendons 8.
  • push catches 13 are arranged, which are introduced into previously produced recesses 14 in the concrete and potted with mortar.
  • Fig. 4 shows a cross section through the transition point, which is located directly in the tendon 8. After preloading and securing the tendon strands 9, the cladding tube 12 is pressed. Subsequently, the anchor head - not shown in the drawing - protected against corrosion. LIST OF REFERENCE NUMBERS

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Wind Motors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The invention relates to a T-shaped component (1), preferably made of steel, which is particularly suited to form the transition between the lower pre-stressed concrete section (7) of a tower, preferably of a wind turbine, and the rising tower section made of steel (6) or an alternative material. The stressing elements (8) of the lower pre-stressed concrete tower section (7) are fed through, anchored, and preloaded through holes (3, 5) arranged centrally in a T cross-section. The component (1) is thus anchored without further anchoring elements and without additional loads from forces acting eccentrically.

Description

TITEL  TITLE
Vorrichtung und Verfahren für den Übergang zwischen einem Stahlturmabschnitt und einem vorgespannten Betonturmabschnitt  Apparatus and method for the transition between a steel tower section and a prestressed concrete tower section
BESCHREIBUNG Technisches Gebiet DESCRIPTION Technical area
Die vorliegende Erfindung betrifft eine Verbindung zwischen zwei Konstrukti- onsabschnitten eine Turmes - bevorzugt eines Turmes einer Windenergieanlage - untereinander. Bei der Koppelstelle handelt es sich um den Übergang zwischen einem in der Regel vorgespannten Stahlbetonturmabschnitt und der aufgehenden Stahlkonstruktion. Stand der Technik  The present invention relates to a connection between two construction sections of a tower - preferably a tower of a wind turbine - with each other. The coupling point is the transition between a generally prestressed reinforced concrete tower section and the rising steel structure. State of the art
Windenergieanlagentürme mit Turmabschnitten aus unterschiedlichen Materialien werden auch als Hybridtürme bezeichnet. Der untere Abschnitt aus Beton kann aus vorgefertigten Betonelementen, die miteinander verbunden werden, oder aus einem monolithischen Betonbauteil bestehen. Um eine höhere Standfestigkeit zu erhalten ist der Konstruktionsabschnitt aus Betonwerkstoff häufig vorgespannt. Dies erfolgt mittels im Turminneren frei zugänglichen Spanngliedern oder mittels Spanngliedern, die innerhalb des Betonquerschnittes liegen und nach dem Vorspannen vergossen werden. Durch das Vergießen des Hohlraumes zwischen Spannglied und Hüllrohr mit einem alkalischen Vergussmaterial ist das Spannglied besonders gut vor Korrosion geschützt. Außerdem ermöglicht die Lage des Spanngliedes im Betonquerschnitt eine zentrische Vorspannkraft hinsichtlich der Schwerlinie des Betonquerschnittes; es treten keine zusätzlichen Biegebelastungen auf.  Wind turbine towers with tower sections made of different materials are also referred to as hybrid towers. The lower section of concrete may consist of prefabricated concrete elements that are joined together, or of a monolithic concrete component. In order to obtain a higher stability, the construction section made of concrete material is often preloaded. This is done by means of tendons freely accessible in the tower interior or by means of tendons, which lie within the concrete cross-section and are cast after preloading. By casting the cavity between the tendon and cladding tube with an alkaline potting the tendon is particularly well protected against corrosion. In addition, the position of the tendon in the concrete cross section allows a centric biasing force with respect to the heavy line of the concrete cross section; There are no additional bending loads.
Der aufgehende Turmabschnitt aus Stahl kann aus mehreren röhrenförmigen Turmsegmenten bestehen, die entweder einstückig gefertigt sind oder aus mehreren zusammengefügten Segmenten über den Umfang der Sektion bestehen. In diesem Stahlringquerschnitt herrschen ebenfalls zentrische Spannungsverhältnisse. Alternativ zu einer Ausführung in Stahl kann der obere Turmabschnitt aus hochfestem, alterungsbeständigem Kunststoff - beispielsweise Glasfaserverstärker Kunststoff - gefertigt sein. The rising tower section made of steel may consist of several tubular tower segments, which are either made in one piece or consist of several joined segments over the circumference of the section. Centric stress conditions also prevail in this steel ring cross section. As an alternative to an execution in steel, the upper Tower section made of high-strength, age-resistant plastic - for example, glass fiber amplifier plastic - be made.
An der Verbindungsstelle des oberen Turmabschnittes mit dem unteren, vor- gespannten Turmabschnitt aus Beton treffen unterschiedliche Werkstoffe und Bauteildicken aufeinander. Beide Bauteile müssen dauerhaft fest miteinander verbunden werden, um den hohen dynamischen Belastungen standzuhalten. At the juncture of the upper tower section with the lower, pre-stressed concrete tower section, different materials and component thicknesses meet. Both components must be permanently connected firmly to withstand the high dynamic loads.
Für dieses Detail sind verschiedene Lösungen aus dem Stand der Technik bekannt. So ist in der Patentschrift DE 102 30 273 B3 ein ringförmiges Adapterelement aus Stahl beschrieben, das Bohrungen aufweist, durch die die Spannglieder aus dem unteren Betonturmabschnitt geführt sind. Oberhalb des Adapterelementes sind die Spannglieder verankert, so dass eine feste Verbindung zwischen Adapterelement und Spannbeton besteht. Am oberen Abschluss des Adapterelementes befindet sich eine Flanschkonstruktion, an die die aufgehende Stahlkonstruktion angeschlossen ist. Im Adapterring entsteht konstruktionsbedingt ein Versatz der Lastweiterleitung, da die Spanngliedverankerung außerhalb der aufgehenden Wandung liegt. Bei der aus DE 10 2007 031 065 A1 bekannten Konstruktion ist am oberen Abschluss des Betonturmsegmentes ein ringförmiger Kopfbalken angeordnet, durch den die im Turminneren liegenden, freien Spannglieder geführt und verankert sind. Die aufgehende Stahlkonstruktion weist einen einseitigen Flansch auf. Durch den Kopfbalken verläuft eine geneigte Bohrung, durch die Verankerungsbolzen geführt sind. Diese verbinden Stahlflansch und Betonbauteil und sind jeweils mit zwei Muttern befestigt. Diese Lösung ermöglicht den Austausch der Ankerbolzen, aber auch hier entsteht ein Versatz in der Wirkungslinie der Vertikalkräfte. DE 10 2004 017 006 A1 beschreibt eine Verankerungskonstruktion, deren unteres Bauteil - eine durchankerte Stahlplatte - im Beton des Turmschaftes oder des Fundamentes eingegossen wird. Der Aufbau der Konstruktion ist symmetrisch: im aufgehenden Stahlbauteil ist ein symmetrischer, T-förmiger Flansch angeordnet, durch den beidseitig des Steges je eine Ankerstange geführt und mit einer Mutter befestigt wird. Bei Anordnung von Vorspannlitzen im unteren Turmschaft können diese zwar im Betonquerschnitt geführt und nachträglich vergossen werden, allerdings liegt die Endverankerung des Spanngliedes im Betonquerschnitt seitlich neben der Verankerung des aufgehenden Stahlsegmentes. Um sowohl die Verankerungskonstruktion für den aufgehenden Stahlturm als auch die Endverankerung des Spanngliedes im Querschnitt unterbringen zu können, ist eine Aufweitung des Betonquerschnit- tes notwendig. Various solutions of the prior art are known for this detail. Thus, the patent DE 102 30 273 B3 describes an annular adapter element made of steel, which has bores through which the tendons are guided out of the lower concrete tower section. Above the adapter element, the tendons are anchored, so that there is a firm connection between the adapter element and prestressed concrete. At the upper end of the adapter element is a flange construction, to which the rising steel structure is connected. Due to the design, an offset of the load transfer occurs in the adapter ring, since the tendon anchoring lies outside the rising wall. In the construction known from DE 10 2007 031 065 A1, an annular head beam is arranged at the upper end of the concrete tower segment, through which the free tendons lying in the tower interior are guided and anchored. The rising steel structure has a one-sided flange. Through the head bar extends an inclined bore through which anchoring bolts are guided. These connect steel flange and concrete component and are each fastened with two nuts. This solution allows the replacement of the anchor bolt, but also here creates an offset in the line of action of the vertical forces. DE 10 2004 017 006 A1 describes an anchoring construction, the lower component of which - a steel plate anchored through - is cast in the concrete of the tower shaft or of the foundation. The structure of the construction is symmetrical: in the rising steel component a symmetrical, T-shaped flange is arranged, through which an anchor rod is guided on both sides of the web and fastened with a nut. In the arrangement of prestressing strands in the lower tower shaft, these can indeed be guided in the concrete cross-section and subsequently potted, however, the final anchoring of the Tendon in concrete cross-section laterally next to the anchorage of the rising steel segment. In order to accommodate both the anchoring structure for the rising steel tower and the final anchorage of the tendon in cross section, a widening of the concrete cross section is necessary.
Alternativ kann ein L-förmiger, einseitiger Flansch am aufgehenden Stahlsegment angeformt werden. Dieser wird am oberen Ende des Betonbauteils aufgesetzt und direkt vom Spannglied durchankert. Wegen der hohen auftre- tenden Kräfte und des Versatzes zwischen Normalspannungen im Stahlring und der Lasteinleitung der Vorspannkraft muss der Flansch sehr dick ausgeführt werden. Außerdem ist es auch in dieser Bauweise aus geometrischen Gründen erforderlich, dass der Betonquerschnitt aufgeweitet wird - und dass das Spannglied aus seiner Achse heraus zur Endverankerung hin verzogen wird. Bedingt durch die Krümmung des Spanngliedes entstehen in dieser Konstruktion Umlenkkräfte, die ebenfalls im Betonquerschnitt aufgenommen werden müssen. Alternatively, an L-shaped, one-sided flange can be formed on the rising steel segment. This is placed on the upper end of the concrete component and anchored directly from the tendon. Because of the high forces occurring and the offset between normal stresses in the steel ring and the load introduction of the preload force, the flange must be made very thick. In addition, it is also necessary in this design for geometric reasons that the concrete cross-section is widened - and that the tendon is warped out of its axis out to the final anchorage out. Due to the curvature of the tendon arise in this construction deflection forces that must also be included in the concrete section.
Allen bekannten Lösungen haben gemeinsam, dass an dieser dynamisch hochbelasteten Stelle ein Versatz aus der Vorspannkraft und der Normallkraft im Stahlturmabschnitt entsteht.  All known solutions have in common that at this dynamic high-load point offset from the biasing force and the Normalallkraft arises in the steel tower section.
Aufgabe der Erfindung Object of the invention
Aufgabe der Erfindung ist es, eine Übergangskonstruktion für einen Hybridturm - mit einem oberen Turmabschnitt aus Stahl oder Glasfaserverstärktem Kunststoff und einem unteren Abschnitt aus Spannbeton - zur Verfügung zu stellen, die den hohen dynamischen Einwirkungen stand hält, kompakt aufgebaut und wirtschaftlich ist und die Errichtung des Turmes vereinfacht.  The object of the invention is to provide a transitional structure for a hybrid tower - with an upper tower section made of steel or glass fiber reinforced plastic and a lower section of prestressed concrete - which withstands the high dynamic effects, is compact and economical and the establishment of the Tower simplified.
Darstellung der Erfindung Presentation of the invention
Die Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. The object is solved by the features specified in the characterizing part of claim 1.
Hierzu sieht die Erfindung ein vorgefertigtes ringförmiges oder ringsegment- förmiges Bauteil aus Stahl - oder alternaiv aus Glasfaserverstärktem Kunststoff (GFK) - als Übergangselement vor. Dieses hat im Querschnitt die Form eines umgekehrten Ts mit einem vertikal angeordneten Steg, der den Übergang zum aufgehenden Querschnitt des oberen Turmabschnittes darstellt. Im Flansch sind in Ringrichtung im definierten Abstand zueinander mittig Öffnun- gen ausgespart, durch die die Spannglieder des Spannbetonturmabschnittes durchgeführt werden. Im Bereich dieser Flanschdurchörterungen ist der Steg - vorzugsweise in ausgerundeter Form, um Spannungskonzentrationen zu reduzieren - ausgenommen, so dass die Ankerköpfe der Spannglieder Platz finden. Die Spannglieder werden durch die Aussparungen im erfindungsgemäßen Bauteil gefädelt. Das Übergangselement wird in seiner endgültigen Lage auf der Oberkante des Stahlbeton-Turmabschnittes ausgerichtet und kraftschlüssig mit Vergussmörtel vergossen. Zur Erhöhung der Schubkrafttragfähigkeit sind in einer alternativen Ausführungsvariante unterhalb des Flansches sogenannte Schubknaggen angeordnet, die in vorher hergestellte Vertiefungen im Beton eingebracht werden. Nach Erhärten des Vergussmaterials werden die Ankerköpfe eingebaut und eine definierte Vorspannkraft aufgebracht. Die Ankerköpfe werden festgelegt, d. h. die Spannglieder werden verkeilt und die Hüllrohre der Vorspannglieder mit - bevorzugt alkalischem - Verpressmaterial verfüllt. Im nächsten Schritt wird ein Korrosionschutz amFor this purpose, the invention provides a prefabricated annular or ringsegment- shaped component made of steel - or alternatively made of glass fiber reinforced plastic (GRP) - as a transition element. This has in cross section the shape of an inverted Ts with a vertically arranged web, which represents the transition to the rising cross section of the upper tower section. In the flange in the ring direction at a defined distance from each other in the middle recessed gene through which the tendons of the prestressed concrete tower section are performed. In the area of these flange intersections, the web is preferably recessed in rounded form so as to reduce stress concentrations so that the anchor heads of the tendons can be accommodated. The tendons are threaded through the recesses in the component according to the invention. The transition element is aligned in its final position on the upper edge of the reinforced concrete tower section and potted with non-positive grout. To increase the shear force capacity so-called push knobs are arranged in an alternative embodiment below the flange, which are introduced into previously prepared depressions in the concrete. After hardening of the potting material, the anchor heads are installed and applied a defined biasing force. The anchor heads are fixed, ie the tendons are wedged and the cladding tubes of the tendons filled with - preferably alkaline - injection material. In the next step, a corrosion protection on
Ankerkopf angebracht; dieser kann demontierbar ausgeführt werden, so dass eine Überprüfung der Ankerköpfe im Zuge einer Wartung jederzeit möglich ist. Anchor head attached; this can be done demountable, so that a check of the anchor heads in the course of maintenance is possible at any time.
Über das Aufbringen und Festlegen der Vorspannkraft wird das Übergangs- element direkt mit dem Stahlbetonschaft verbunden. Ein zusätzliches Einbauten zur Verankerung oder Befestigung des Stahlturmabschnittes auf dem Spannbetonturmabschnitt ist nicht nötig.  By applying and fixing the preload force, the transition element is connected directly to the reinforced concrete shaft. An additional installation for anchoring or attachment of the steel tower section on the prestressed concrete tower section is not necessary.
Da die Schwerlinie des Stahlquerschnittes mit der des Betonquerschnittes in einer Wirkungslinie liegt, ist kein Versatz und damit auch keine daraus resul- tierende Zusatzbelastung vorhanden. Die Wandung des aufgehenden Turmes sowie die Bauteildicke des unteren Betonturmabschnittes können minimiert und wirtschaftlich ausgeführt werden. Auch eine geometrische Aufweitung der Stahlbetonwand - zur Aufnahme weiterer Einbauteile oder gekrümmter Spanngliedführung - kann entfallen.  Since the center of gravity of the steel cross-section is in line with that of the concrete cross-section, there is no offset and therefore no resulting additional load. The wall of the rising tower and the component thickness of the lower concrete tower section can be minimized and carried out economically. Also, a geometric expansion of the reinforced concrete wall - to accommodate other built-in parts or curved tendon guide - can be omitted.
Durch die mittige Lasteinleitung der Vorspann- und damit auch der Verbindungskraft in den Flansch des Stahlbauteiles erfährt dieser keine Biegebelastung in Querrichtung und kann somit geometrisch optimiert ausgebildet werden: auch an dieser Stelle wird Material eingespart. In einer Ausgestaltung ist das Übergangselement ringsegmentförmig und mit mindestens einem weiteren oder beispielsweise zwei oder drei oder mehreren insbesondere identisch geformten ringsegmentförmigen Übergangsbauteilen zu einem geschlossenen Ring verbindbar. Die miteinander verbundenen Segmente bilden gemeinsam ein ringförmiges Übergangselement. Due to the central load introduction of the biasing and thus also the connection force in the flange of the steel component of this no bending stress in the transverse direction and can thus be designed geometrically optimized: even at this point material is saved. In one embodiment, the transition element is ring segment-shaped and having at least one further or, for example, two or three or more, in particular identically shaped, ring-segment-shaped transition components connectable to a closed ring. The interconnected segments together form an annular transition element.
Die Erfindung wird nachfolgend anhand von vier Zeichnungen erläutert. Es zeigen: The invention will be explained below with reference to four drawings. Show it:
Fig. 1 zeigt schematisch eine Teilansicht des Turmes - bevorzugt des Turmes einer Windenergieanlage - mit der Übergangsstelle zwischen aufgehendem Stahlturmabschnitt 6 und unterem Spannbetonturmabschnitt 7. Fig. 1 shows schematically a partial view of the tower - preferably the tower of a wind turbine - with the transition point between rising steel tower section 6 and lower prestressed concrete tower section. 7
In Fig. 2 ist das erfindungsgemäße Übergangsbauteil 1 im Detailausschnitt in eingebautem Zustand dargestellt. Im Flansch 2 des T-förmigen Bauteiles 1 sind Aussparungen 3 passgenau zur Lage der Spannglieder 8 angeordnet. An der selben Stelle ist der Steg 4 mit einer Aussparung 5 versehen. Das schlaffe Spannglied 8 wird im Zuge der Montage des Bauteiles 1 durch die Ausspa- rungen 3 im Flansch 2 geführt. Nach dem Ausrichten wird das Mörtelbett 1 1 zwischen Bauteil 1 und unterem Turmabschnitt aus Beton 7 mit Vergussmörtel 1 1 verfüllt. Nach Erhärten des Mörtels 1 1 kann der Ankerkopf 10 in der vorgesehenen Aussparung 5 im Steg 4 montiert werden: Die Spanngliedlitzen 9 werden durch den Ankerkopf 10 geführt und mit Keilen gesichert. Die Vor- Spannkraft wird mittels Pressen am unteren Ende der Spannglieder aufgebracht. In Fig. 2, the transitional component 1 according to the invention is shown in detail in the installed state. In the flange 2 of the T-shaped component 1 recesses 3 are arranged accurately to the position of the tendons 8. At the same point, the web 4 is provided with a recess 5. The flaccid tensioning element 8 is guided in the flange 2 during the assembly of the component 1 by the cutouts 3. After alignment, the mortar bed 1 1 between component 1 and lower tower section made of concrete 7 with grout 1 1 is filled. After hardening of the mortar 1 1, the anchor head 10 can be mounted in the recess 5 provided in the web 4: The tendon strands 9 are guided by the anchor head 10 and secured with wedges. The pre-clamping force is applied by means of pressing at the lower end of the tendons.
Fig. 3 zeigt einen Querschnitt durch die Übergangsstelle, der zwischen zwei Spanngliedern 8 liegt. In einer alternativen Ausführungsvariante sind zur Erhöhung der Schubkrafttragfähigkeit unterhalb des Flansches zusätzlich soge- nannte Schubknaggen 13 angeordnet, die in vorher hergestellte Vertiefungen 14 im Beton eingebracht und mit Mörtel vergossen werden.  Fig. 3 shows a cross section through the transition point, which lies between two tendons 8. In an alternative embodiment, in order to increase the shear force carrying capacity below the flange additionally so-called push catches 13 are arranged, which are introduced into previously produced recesses 14 in the concrete and potted with mortar.
Fig. 4 zeigt einen Querschnitt durch die Übergangsstelle, der direkt im Spannglied 8 liegt. Nach dem Vorspannen und Sichern der Spanngliedlitzen 9 wird das Hüllrohr 12 verpresst. Im Anschluss wird der Ankerkopf - in der Zeichnung nicht dargestellt - gegen Korrosion geschützt. Bezugszeichenliste Fig. 4 shows a cross section through the transition point, which is located directly in the tendon 8. After preloading and securing the tendon strands 9, the cladding tube 12 is pressed. Subsequently, the anchor head - not shown in the drawing - protected against corrosion. LIST OF REFERENCE NUMBERS
1 T-förmiges Bauteil aus Stahl 2 Flansch 1 T-shaped steel component 2 flange
3 Aussparung im Flansch 4 Steg  3 recess in the flange 4 bar
5 Aussparung im Steg 6 Stahl-Turm abschnitt 7 Spannbeton-Turmabschnitt 8 Spannglied  5 recess in the web 6 steel tower section 7 prestressed concrete tower section 8 tendon
9 Spannglied-Litzen 10 Ankerkopf  9 tendon strands 10 anchor head
1 1 Mörtelbett  1 1 mortar bed
12 Hüllrohr  12 cladding tube
13 Schubknagge am Einbauteil 14 Aussparung im Beton  13 push knob on the mounting part 14 recess in the concrete

Claims

ANSPRÜCHE
1 . T-förmiges Bauteil aus Stahl (1 ) als Übergangsbauteil an der Koppelstelle zwischen einem unteren Turmabschnitt aus Spannbeton (7) und dem aufgehenden Turmabschnitt aus Stahl (6), das ringförmig oder ringsegment- förmig und mit mindestens einem weiteren oder beispielsweise zwei oder drei oder mehreren insbesondere identisch geformten ringsegmentförmi- gen Übergangsbauteilen zu einem geschlossenen Ring verbindbar ist, dadurch gekennzeichnet, dass mittig im Querschnitt und in definiertem Abstand zueinander in Ringrichtung Aussparungen (3, 5) in Flansch (2) und Steg (4) angeordnet sind, durch die die Spannglieder (8) des unteren Spannbeton-Turmabschnittes (7) geführt, verankert und vorgespannt sind. 1 . T-shaped component made of steel (1) as a transitional component at the coupling point between a lower tower section of prestressed concrete (7) and the rising tower section made of steel (6), the annular or ring segment-shaped and with at least one further or for example two or three or a plurality of, in particular identically shaped, annular segment-shaped transition components can be connected to form a closed ring, characterized in that recesses (3, 5) are arranged centrally in cross-section and at a defined distance from one another in the ring direction in the flange (2) and web (4) the tendons (8) of the lower prestressed concrete tower section (7) are guided, anchored and prestressed.
2. Bauteil (1 ) nach Anspruch 1 , 2. Component (1) according to claim 1,
dadurch gekennzeichnet, dass seine geometrische Lage an der Übergangsstelle so ist, dass die Wirkungslinie der Spannglieder (8) mit der Schwerlinie des Bauteiles (1 ) übereinstimmt und so eine zentrische Lasteinleitung erfolgt. characterized in that its geometric position at the transition point is such that the line of action of the tendons (8) coincides with the heavy line of the component (1) and so a centric load introduction takes place.
3. Bauteil (1 ) nach einem der Ansprüche 1 und 2, 3. component (1) according to any one of claims 1 and 2,
dadurch gekennzeichnet, dass das Bauteil (1 ) an der Unterseite des Flansches zusätzlich mit Schubknaggen (13) versehen ist, die in vorgesehene Vertiefungen (14) im unteren Bauteil eingreifen.  characterized in that the component (1) is additionally provided on the underside of the flange with thrust catches (13) which engage in recesses (14) provided in the lower component.
4. Bauteil (1 ) nach einem der Ansprüche 1 bis 3, 4. component (1) according to one of claims 1 to 3,
dadurch gekennzeichnet, dass das Bauteil (1 ) aus einem alternativen Material - bevorzugt Glasfaserverstärkter Kunststoff - hergestellt ist.  characterized in that the component (1) made of an alternative material - preferably glass fiber reinforced plastic - is made.
5. Verfahren zur Montage einer Übergangskonstruktion (1 ) eines Hybridturmes aus einem aufgehenden Turmabschnitt aus Stahl (6) und eines unteren Turmabschnittes aus Spannbeton (7) nach einem der Ansprüche 1 bis 4, umfassend die Schritte: 5. A method for assembling a transition structure (1) of a hybrid tower comprising a rising tower section made of steel (6) and a lower tower section made of prestressed concrete (7) according to one of claims 1 to 4, comprising the steps:
- Ausrichten des Übergang-Bauteiles (1 ) auf der Oberkante des unte- ren Spannbeton-Turmabschnitt (7) mit Durchführen der Spannglieder (8) durch die vorgesehenen Öffnungen (3) im Flansch (2) des - Aligning the transitional component (1) on the upper edge of the lower prestressed concrete tower section (7) with passing the tendons (8) through the openings provided (3) in the flange (2) of
Bauteiles (1 ) Components (1)
- kraftschlüssiges Vergießen des Mörtelbettes (1 1 )  - Non-positive pouring of the mortar bed (1 1)
- nach dem Aushärten des Mörtelbettes (1 1 ): Einbau der Ankerköpfe - after hardening of the mortar bed (1 1): installation of the anchor heads
(10), Verankerung der Spannglied-Litzen (9) und Spannen der(10), anchoring the tendon strands (9) and tightening the
Spannglieder (8) Tendons (8)
- Verfüllen des Hüllrohres (12)  - filling the cladding tube (12)
EP12724559.5A 2011-03-14 2012-03-08 Device and method for the transition between a rising tower section and a pre-stressed concrete tower section Not-in-force EP2744955B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011001250A DE102011001250A1 (en) 2011-03-14 2011-03-14 Apparatus and method for the transition between a steel tower section and a prestressed concrete tower section
PCT/DE2012/100055 WO2012122976A2 (en) 2011-03-14 2012-03-08 Device and method for the transition between a steel tower section and a pre-stressed concrete tower section

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EP2744955A2 true EP2744955A2 (en) 2014-06-25
EP2744955B1 EP2744955B1 (en) 2016-01-20

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DE102011001250A1 (en) 2012-09-20
WO2012122976A3 (en) 2012-11-15
WO2012122976A2 (en) 2012-09-20

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