Querkraftversuche an Spannbetondurchlaufträgern mit Plattenbalkenquerschnitt/Shear tests on prestressed concrete continuous beams with T-shaped cross section

Gleich, Philipp; Maurer, Reinhard J.

doi:10.37544/0005-6650-2018-02-31

Cited by 6 publications

(3 citation statements)

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“…This enables accurate measurement of activation and anchorage of vertical reinforcement elements crossing each emerging shear crack, which is typically impossible with localized strain gauges. As the fibers can be arranged in continuous loops, it is no longer necessary to install a multitude of individual strain gauges to enhance the chance of measuring near the critical shear crack (e.g., Reference 53).…”

Section: Application Concepts For Fos In Trc Researchmentioning

confidence: 99%

Application of fiber optic measurement in textile‐reinforced concrete testing

Becks

Bielak

Camps

et al. 2021

Structural Concrete

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In research on concrete constructions, fiber optic sensor technology is becoming increasingly important. It enables high‐frequency and quasi‐continuous measurement of temperature and strain distribution. Furthermore, this technology offers the opportunity to determine the crack width within the cross section of specimens and not, as with conventional instrumentation, only from the outside. While experience for application of fiber sensors in steel‐reinforced concrete research already exists for several years, only few findings are available for textile‐reinforced concrete (TRC). This article gives a short overview of the principle of fiber optic sensor technology, presents possible concepts for utilization in TRC testing, and explains the necessary post‐processing steps for the preparation of the measurement results by means of an example from current research. Finally, the results are validated with conventional measuring methods and the applicability and further challenges are discussed.

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Section: Application Concepts For Fos In Trc Researchmentioning

confidence: 99%

Application of fiber optic measurement in textile‐reinforced concrete testing

Becks

Bielak

Camps

et al. 2021

Structural Concrete

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“…The load-bearing behavior of representative prestressed concrete beams having an effect of continuity, especially with the internal support areas being subjected to high moments and shear forces, has been increasingly analyzed and appropriately documented [5][6][7][8][9][10][11][12][13][14][15][16][17] only during the past 10 years, especially by the present authors. For the experimental analysis of the shear load-bearing behavior, large-scale tests were carried out on two-span prestressed concrete beams, for example at TU Dortmund University, in cooperation with the Institute of Structural Concrete of RWTH Aachen University, ZM-I Engineering corporation, and the Chair of Concrete and Masonry Structures of TU Munich University.…”

Section: Introductionmentioning

confidence: 99%

“…The internal lever arm z and the point of action of the horizontal strut component F cwhd are illustrated in Figure 9 at the example of the large-scale Dortmunder test beam DLT 1 (DLT 1 documented in 6,7,10,14,15 ). The horizontal component F cwhd of the inclined strut force F cwd is applied at a distance a + z gew /2 from the compressed cross-section boundary, wherein a describes the distance from the compressed cross-section boundary to the position of the flexural compression force F cd .…”

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confidence: 99%

Arch Action Model for the structural assessment of existing prestressed concrete bridges

Gleich

Maurer

2023

Structural Concrete

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Structural assessments of existing older prestressed concrete bridges according to the currently applicable standards and guidelines in Germany generally reveal significant deficiencies in shear reinforcement. Large‐scale tests within the scope of research activities commissioned by the Federal Highway Research Institute (BASt) were carried out at TU Dortmund University to analyze the shear load‐bearing behavior of continuous prestressed concrete beams in more detail. The Arch Action Model (AAM) was derived from the Simplified Arch Action Model (SAAM) to provide a possible analysis method for determining shear contribution from concrete. Thus, the shear capacity of prestressed beams can be determined in a more realistic manner than using the truss model underlying the current state of standardization. The paper at hand provides information and explanations about the SAAM and AAM with regard to their application to real‐world structures for structural bridge assessments.

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Nachrechnung der Querkrafttragfähigkeit von mehrfeldrigen Spannbetonbrücken mit geringer Bügelbewehrung

Huber

Kleiser³

et al. 2018

Beton und Stahlbetonbau

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Die Beurteilung der Tragfähigkeit von bestehenden Spann betonbrücken ist seit geraumer Zeit fest im Aufgabenfeld des Bauingenieurs verankert. Bedeutende Änderungen in der Normung führten dazu, dass der Querkraftnachweis bei vorgespannten Brücken mit den derzeit gültigen Regelungen in der Bestandsbewertung oftmals nicht erfüllt werden kann. An der TU Wien wurde deshalb ein neues Nachweismodell entwickelt, welches eine adäquate Abbildung des Tragverhaltens ermöglicht. Nach erfolgreicher Anwendung bei Einfeldträgern werden nun an der Innenstütze von mehrfeldrigen Spannbetonbrücken acht Versuche zur Verifikation der Modellannahmen vorgestellt. Der Versuchsaufbau und die Versuchskörper wurden zur realitätsnahen Abbildung der Schnittgrößenkonfiguration (großes negatives Moment kombiniert mit abfallender Querkraft) von vorgespannten Brücken im Maßstab 1:2 konzipiert. Der Einfluss des Vorspanngrades, der Querschnittsform, der Querkraftbewehrung und der Schubschlankheit wurde unter dieser Konfiguration erstmalig systematisch untersucht. Die Evaluierung der Ergebnisse mit den Regelwerken der österreichischen Nachrechnungsrichtlinie und eine Parameterstudie zeigen das hohe Potenzial des FSC‐Modells („flexural‐shear crack“) auf.

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Querkraftversuche an Spannbetondurchlaufträgern mit Plattenbalkenquerschnitt/Shear tests on prestressed concrete continuous beams with T-shaped cross section

Cited by 6 publications

References 0 publications

Application of fiber optic measurement in textile‐reinforced concrete testing

Application of fiber optic measurement in textile‐reinforced concrete testing

Arch Action Model for the structural assessment of existing prestressed concrete bridges

Nachrechnung der Querkrafttragfähigkeit von mehrfeldrigen Spannbetonbrücken mit geringer Bügelbewehrung

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