Torsionstragverhalten eines Segmentturms mit alternativer Fugenausbildung

Hartwig, S.; Bock, Hendrik; Göhlmann, Joachim; Marx, Steffen

doi:10.1002/best.201800062

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…According to analytical and numerical investigations by Klein and Marx [12]- [14], the introduction of vertical joints results in a significantly more complex joint load-bearing behaviour of the tower structure. Hartwig et al [15] conducted numerical calculations and found that using half-shell segments reduces the torsional load-bearing capacity of the horizontal joint by up to 40% compared to circular ring segments, even when the joint is fully compressed. To better understand these findings, experimental investigations on segmented tower structures with vertical joints are necessary.…”

Section: Discussionmentioning

confidence: 99%

Experimental study on the joint load-bearing behaviour of segmented concrete towers under combined loading

Fürll,

Klein,

Götze

et al. 2024

J. Phys.: Conf. Ser.

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Hybrid towers have become increasingly established for tall wind turbines. The concrete part of these towers consists of several stacked circular ring segments. To reduce the amount of fabrication and erection effort, the joints between the segments are usually designed as dry ground joints. This paper presents experimental investigations aimed at determining the torsional load-bearing capacity of such dry ground concrete joints subjected to combined loading of prestressing, bending and torsion. Based on previous investigations, a test set-up consisting of three circular ring segments was developed. The torsional load-bearing capacity was determined by monitoring the tangential joint displacements in detail. The test results demonstrate that an increasing bending load leads to a uniform decrease in the torsional load-bearing capacity. The comparison with the current calculation model shows significant differences and confirms the weaknesses of the model regarding its inadequate interaction with the bending load. In contrast, numerical simulations agree well with the test results.

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Section: Discussionmentioning

confidence: 99%

Experimental study on the joint load-bearing behaviour of segmented concrete towers under combined loading

Fürll,

Klein,

Götze

et al. 2024

J. Phys.: Conf. Ser.

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“…Neben Brücken sind auch Windenergieanlagen (WEA) aufgrund der hohen Standardisierungsmöglichkeit der Turmsegmente ein Anwendungsgebiet [5–7]. Beide Bauwerksgruppen werden vorrangig durch nichtruhende, zyklische Belastungen beansprucht.…”

Section: Motivationunclassified

Vorgespannte Trockenfugen für modulare Brücken unter zyklischer Belastung

Schaarschmidt

Flederer

2021

Beton und Stahlbetonbau

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Modulares Bauen mit Betonfertigteilen gewinnt in den letzten Jahren verstärkt an Bedeutung. Aktuelle Entwicklungen in Praxis und Forschung untersuchen das Fügen der einzelnen Module völlig ohne Ortbeton, Vergussmörtel, Klebung oder Schubnocken. Eine Möglichkeit zur Kraftübertragung bietet das Aktivieren der Oberflächenreibung mittels Vorspannung. Während die Schertragfähigkeit maßgeblich vom Haftreibungsbeiwert abhängt, ist die Biegetragfähigkeit an die Dekompression der Trockenfuge gebunden. Aus statischer Sicht ist die wirklichkeitsnahe Beurteilung der Oberflächentopographie essentiell. In der DIN EN 1992‐1‐1 wird diese in vier Stufen von sehr glatt bis verzahnt eingeteilt, wodurch die Vielzahl an unterschiedlichen Oberflächenqualitäten nur grob abgebildet wird. Darüber hinaus ist die uneingeschränkte Übertragbarkeit des Coulombschen Reibungsgesetzes auf den Beton, vor allem bei höheren Druckspannungen in der Fuge, zu überprüfen. Zwei nennenswerte Anwendungsfelder des modularen Bauens stellen Brückenbauwerke und Windenergieanlagen dar. Beide Bauwerksgruppen unterliegen vorwiegend nichtruhenden Belastungen, welche ermüdungsrelevante Beanspruchungen im Kontaktbereich hervorrufen. Um dauerhafte, ermüdungsresistente und sichere Bauwerke zu errichten, müssen die maßgeblichen Beanspruchungscharakteristika sowie deren Auswirkungen auf die Kontaktoberfläche und die Betonmatrix identifiziert und untersucht werden.

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Experimental and analytical study on the load‐bearing capacity of segmented tower structures with dry joints under combined loading

Fürll,

Klein,

Hartwig

et al. 2024

Structural Concrete

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In recent years, hybrid towers have become increasingly established, especially for tall wind turbines. The concrete part of these towers, commonly constructed using segmental construction methods, consists of several circular ring segments stacked on top of each other. To reduce the amount of fabrication and erection effort, the joints between the segments are typically designed as dry ground joints. This paper deals with experimental investigations to determine the torsional load‐bearing capacity of such dry ground concrete joints subjected to combined loading of prestressing, bending, and torsion. Based on the experience of previous investigations, a test set‐up consisting of three reinforced concrete segments with circular ring cross‐sections was developed. The herein newly developed evaluation concept enabled precise identification of the failure point for each test run utilizing the measured tangential displacements of the joint. The test results clarify the weaknesses of the current design model regarding the insufficient interaction with the bending moment and show very good accordance with the new calculation model, the so‐called fiber model.

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Torsionstragverhalten eines Segmentturms mit alternativer Fugenausbildung

Cited by 8 publications

References 10 publications

Experimental study on the joint load-bearing behaviour of segmented concrete towers under combined loading

Experimental study on the joint load-bearing behaviour of segmented concrete towers under combined loading

Vorgespannte Trockenfugen für modulare Brücken unter zyklischer Belastung

Experimental and analytical study on the load‐bearing capacity of segmented tower structures with dry joints under combined loading

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