Modellierung des Verankerungsverhaltens getränkter textiler Bewehrungen

Preinstorfer, Philipp; Pinzek, Andreas; Kollegger, Johann

doi:10.1002/best.202000011

Cited by 7 publications

(6 citation statements)

References 11 publications

(18 reference statements)

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“…The splitting forces due to bond action are calculated for a solid fibre strand, assuming that no interlaminar failure occurs in the fibre strand. This is in line with observations from experimental studies [15,18,22], where longitudinal cracking occurred in the concrete but the fibre strand was not damaged.…”

Section: Methods and Boundariessupporting

confidence: 92%

“…8 Splitting force ratio F sp,y /F sp,z vs. parameters k F and k P for three values of the cross-sectional parameter k A : k A =1.2 (left); k A = 1.5 (centre); k A =1. 8 (right) in the concrete than fibre strand type K. This is consistent with the experimental data reported in [22], where all specimens reinforced with fibre strand type S failed earlier than specimens reinforced with fibre strand type K. Nonetheless, it should be noted that there is scatter in the results, which is mainly due to inaccuracies in the manufacturing process of the fibre strands. In pull-out tests on both types of fibre strands reported in [18] the two types failed at nearly the same load stage, and hence the spread of the maximum peak load values was not as great as that of the numerical results reported in this paper.…”

Section: Classification Of Own Experimental Datasupporting

confidence: 90%

“…The study described in this manuscript is limited to short individual yarns. Investigations on how adjacent fibre strands interfere with each other or on how the development of the axial force in the fibre strand changes for bigger anchorage lengths are carried out elsewhere (see [22], for example).…”

Section: Methods and Boundariesmentioning

confidence: 99%

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Influence of geometrical parameters on the splitting forces in textile-reinforced concrete

Preinstorfer

Kromoser

2020

Mater Struct

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Splitting forces due to bond action can lead to the premature failure of reinforced concrete structural components. In earlier research it was mentioned that it is mainly geometrical parameters that play a key role in the distribution and magnitude of the splitting forces in textile-reinforced concrete. However, so far no accurate geometrical characterisation of textile reinforcement has been performed which considers all the relevant properties of the material such as the regularly repeating variation in cross-sectional dimensions. In this paper, four geometrical parameters are introduced which permit a clear geometrical characterisation of fibre strands and allow for the comparison of different types of textile reinforcement. Furthermore, a broad parametric study was carried out for a pull-out test in which the parameters were varied, and the influence of these parameters on the splitting forces occurring in textile-reinforced concrete was visualised. Based on this parametric study, a mechanical model was established, which takes into account experimental data from previous research. This model allows for the calculation of the splitting forces occurring in textile-reinforced concrete when one short fibre strand is pulled out of the concrete.

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Section: Methods and Boundariessupporting

confidence: 92%

Section: Classification Of Own Experimental Datasupporting

confidence: 90%

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Influence of geometrical parameters on the splitting forces in textile-reinforced concrete

Preinstorfer

Kromoser

2020

Mater Struct

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“…Die Verankerung der Bewehrung in Brückenquerrichtung stellte sich als ein kritischer Punkt der zweiachsig spannenden Platte heraus, da die kurzen Stahlwinkel nur eine geringe Auflagerfläche von 55 mm ermöglichten, die durch die Schwindgassen zusätzlich reduziert wurden. Ein Nachweis gelang unter Ansatz einer Randeinfassung aus vorgeformten C‐Profilen unter Rückgriff auf Ergebnisse aktueller Untersuchungen [15, 16] und Erkenntnisse aus der Literatur [17, 18]. Der Verankerungsnachweis auf den Vouten und Querstahlträgern war mit gerader Bewehrung möglich.…”

Section: Historische Konstruktion Und Sanierungskonzeptunclassified

Sanierung des Rheinstegs bei Albbruck mit Carbonbeton

Bielak

Rempel

Felber

et al. 2021

Beton und Stahlbetonbau

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Der 200 m lange Rheinsteg der Rheinkraftwerk Albbruck‐Dogern AG (RADAG) bei Albbruck ermöglicht seit 1934 Fußgängern und Radfahrern die Querung des Hochrheins. Wegen starker Korrosionsschäden musste der Überbau grundlegend saniert werden. Mit dem Ersatz der historischen Eisenbetonplatte durch eine 7 cm dünne Carbonbetonplatte konnten das Eigengewicht beibehalten und das Stahlhaupttragwerk sowie alle Unterbauten inklusive der vier Pfeiler im Rhein weiter genutzt werden. Dies sparte gegenüber einem Ersatzneubau Kosten und Zeit. Obwohl keine Verbundwirkung der Carbonbetonplatte mit den Hauptträgern angesetzt wurde, sollte die Lauffläche in Ortbetonbauweise ausgeführt und kraftschlüssig angeschlossen werden, um die Globalsteifigkeit und das Schwingungsverhalten der Brücke zu erhalten. Die hieraus resultierenden Zwangskräfte aus Schwinden und Differenztemperatur mussten bei der Bemessung der Carbonbetonplatte als Zugnormalspannungen bis hin zur vollständigen Trennrissbildung berücksichtigt werden. Der vorliegende Beitrag gibt einen Überblick über das Gesamtprojekt, erläutert die Untersuchungen zur Zugnormalkraft‐Querkraft‐Interaktion an Carbonbeton und thematisiert die Herausforderungen des Einsatzes von Carbonbewehrung in Ortbetonbauweise.

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“…As a result, it is often not possible to achieve the service lives assumed in the design of RC structures, so that either expensive repairs or entire replacement structures are required. In order to counteract this issue, researchers all over the globe investigate the potential of alternative reinforcement materials such as fibre-reinforced polymers (FRP) [2][3][4][5][6][7][8][9][10]. Carbon fibre-reinforced polymer (CFRP) reinforcement in particular has proven to be a reasonable alternative due to its resistance to corrosion and other chemical and physical attacks as well as its high tensile strength and relatively high modulus of elasticity compared to other fibre materials.…”

Section: Introductionmentioning

confidence: 99%

Structural behaviour of CFRP reinforced concrete members under monotonic and cyclic long-term loading

et al. 2021

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A large percentage of the damages to reinforced concrete structures is caused by corrosion of the reinforcement steel, which often leads to expensive repairs or new construction of existing structures. Due to their high strength and resistance to corrosion, reinforcements made of carbon fibre-reinforced polymers (CFRP) are becoming more and more important in structural engineering. It is expected, that the service life of CFRP reinforced concrete (RC) members can be significantly increased as the strength-reduction due to corrosion is negligible compared to conventional RC members. Therefore, precise knowledge of the long-term behaviour of CFRP RC members is required in order to ensure safe and economic design. This paper presents experimental investigations on the long-term behaviour of CFRP RC members as well as steel-reinforced RC members under monotonic and cyclic long-term loading with varying load levels, different cross-sectional shapes and shear slendernesses. Accompanying experiments on the concrete creep behaviour that were conducted within the investigations are shown. Within the scope of the experiments, the deflections as well as the strains on the top and bottom side of the RC members were measured using displacement sensors and strain gauges. The experimental data is evaluated, especially with regard to the time-dependent deflections. The data is compared to existing mechanical and empirical models, which are usually derived for steel-reinforced RC members. Based on the experimental data, the time-dependent reduction of stiffness and conclusions for the calculation of deflections are shown.

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Modellierung des Verankerungsverhaltens getränkter textiler Bewehrungen

Cited by 7 publications

References 11 publications

Influence of geometrical parameters on the splitting forces in textile-reinforced concrete

Influence of geometrical parameters on the splitting forces in textile-reinforced concrete

Sanierung des Rheinstegs bei Albbruck mit Carbonbeton

Structural behaviour of CFRP reinforced concrete members under monotonic and cyclic long-term loading

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