Adhesive-bonded timber-concrete composites – Experimental and numerical investigation of hygrothermal effects

Eisenhut, Lars; Seim, Werner; Kühlborn, Sonja

doi:10.1016/j.engstruct.2016.05.056

Cited by 54 publications

(22 citation statements)

References 11 publications

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“…Adhesive (hence chemical) connections have also been investigated [26][27][28][29][30] as a means to avoid drilling into the timber, and to improve TCC connection (and so member) stiffness by reducing interface slip. Both dry slab-on-wet adhesive and wet concrete-on-wet adhesive options have been studied.…”

Section: Literature Reviewmentioning

confidence: 99%

Forward and Reverse shear transfer in beech LVL-concrete composites with singly inclined coach screw connectors

Sebastian

Piazza

Harvey³

et al. 2018

Engineering Structures

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Double-shear tests are reported on beech LVL-concrete composite connections based on coach screw connectors singly inclined at either 45 o or 90 o. On different specimens with the same screw orientation the longitudinal shear force was applied either in forward or reverse, because in practice concrete shrinkage, moisture-induced timber expansion and oscillatory (e.g. seismic) or moving loads can induce reversal of the force on the connection. The test data show that relative to the 90 o screw connections, sloping the screws to 45 o in tension only marginally affected longitudinal shear strength but led to a five-fold increase of slip modulus and to a significant drop in ductility, while sloping the screws the other way to 45 o in compression only marginally affected slip modulus but led to an almost four-fold drop in longitudinal shear strength and to a substantial increase in ductility. The specimens tested within each group showed good consistency of shear strength and (except the 45 o tension screw specimens, despite their consistent strengths) of failure mode, but high variability of slip modulus. Comparisons with previously tested timber-concrete composite (TCC) connections based on other screw types and layouts suggest good performance of the present connections. The gamma method applied to a given TCC T-section under load shows that the present alternate connections lead to quite different depths of uncracked concrete and so to significant variation of midspan deflection. In closing, it is recommended that both forward and reverse shear testing becomes a protocol for singly inclined coach screw-based TCC connections.

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Section: Literature Reviewmentioning

confidence: 99%

Forward and Reverse shear transfer in beech LVL-concrete composites with singly inclined coach screw connectors

Sebastian

Piazza

Harvey³

et al. 2018

Engineering Structures

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“…Für weiterführende Informationen zum Modell und den Materialparametern sei auf Eisenhut bzw. Eisenhut & Seim verwiesen.…”

Section: Experimentelle Langzeituntersuchungen Und Simulationunclassified

“…In diesem Aufsatz wird von den Untersuchungen zum Bauteilverhalten berichtet. Die Kleinkörperversuche sind bei Eisenhut und Eisenhut & Seim ausführlich dokumentiert.…”

Section: Introductionunclassified

Langzeitverhalten geklebter Bauteile aus Holz und hochfestem Beton bei natürlichem Klima

Eisenhut

Seim

2016

Bautechnik

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Holz‐Beton‐Verbundkonstruktionen kombinieren die Eigenschaften der Werkstoffe Holz und Beton auf vorteilhafte Weise. Im Vergleich zur reinen Holzbau‐Lösung weist die Verbundstruktur eine optimierte Tragfähigkeit, ein verbessertes Schwingungsverhalten, einen höheren Schallschutz sowie eine größere thermisch aktivierbare Masse auf. Der Verbund zwischen Holz und Beton wird bisher üblicherweise durch mechanische Verbindungsmittel oder mittels Formschluss erreicht. Dies führt zu einem mehr oder weniger nachgiebigen Verbund. Durch den Einsatz der Klebtechnologie als Verbundmittel wird ein „starrer Verbund” erreicht und durch die Vorfertigung von Verbund‐Fertigteilelementen bleiben die Vorteile einer „trockenen Bauweise” erhalten. Die Fragen zur Herstellungstechnologie und zum Kurzzeitverhalten geklebter Holz‐Beton‐Verbundbauteile wurden am Fachgebiet Bauwerkserhaltung und Holzbau der Universität Kassel bereits in der Vergangenheit untersucht. Für die Anwendung in der Baupraxis fehlten jedoch Kenntnisse des Langzeitverhaltens. Diese Lücke wurde in den vergangenen drei Jahren im Rahmen des von der AiF geförderten Forschungsclusters „BestKleb” geschlossen. Im folgenden Beitrag wird von den Untersuchungen an Bauteilen und der Schlussfolgerung für eine baupraktische Anwendung berichtet.

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“…The concrete shrinks during the whole service life while timber shrinks or swells with the variation of relative humidity and temperature [24] . Therefore, many experimental investigations about time-dependent behaviours of shear connections [25] , [26] , [27] , [28] and TCC beams [29] , [30] , [31] , [32] were conducted. It was found the type and configuration of connections have a great influence on the long-term slip of composite beams [26] , [33] .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, many experimental investigations about time-dependent behaviours of shear connections [25] , [26] , [27] , [28] and TCC beams [29] , [30] , [31] , [32] were conducted. It was found the type and configuration of connections have a great influence on the long-term slip of composite beams [26] , [33] . In addition, Van de Kuilen et al [27] investigated the effect of dimension parameter on the time-dependent behaviour of dowelled connections, and discovered that increasing the dowel diameter could decrease the creep coefficient, and the smooth dowel connection showed a minor creep coefficient than the profiled one.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the long-term behaviour of prefabricated timber-concrete composite beams with steel plate connections

Shi

Liu

Yang

2021

Construction and Building Materials

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Adhesive-bonded timber-concrete composites – Experimental and numerical investigation of hygrothermal effects

Cited by 54 publications

References 11 publications

Forward and Reverse shear transfer in beech LVL-concrete composites with singly inclined coach screw connectors

Forward and Reverse shear transfer in beech LVL-concrete composites with singly inclined coach screw connectors

Langzeitverhalten geklebter Bauteile aus Holz und hochfestem Beton bei natürlichem Klima

Experimental investigation on the long-term behaviour of prefabricated timber-concrete composite beams with steel plate connections

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