Unbewehrte Betongelenke – 100 Jahre Erfahrung im Brückenbau

Schacht, Gregor; Marx, Steffen

doi:10.1002/best.201000030

Cited by 11 publications

(9 citation statements)

References 4 publications

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“…They are unreinforced or marginally reinforced necks in reinforced concrete structures [30,37]. In practical engineering, they are used as supports in bridge construction [30,34,[36][37][38] and as segment-to-segment interfaces of segmented linings used in mechanized tunneling [3,11,21,22,28]. In the latter context, concrete hinges are one of the main challenges for finite element (FE) simulations of segmented tunnels [10,18,24,29,40,42].…”

Section: Introductionmentioning

confidence: 99%

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Bearing capacity of concrete hinges subjected to eccentric compression: multiscale structural analysis of experiments

et al. 2018

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Existing design guidelines for concrete hinges are focusing on serviceability limit states. Lack of knowledge about ultimate limit states was the motivation for this work. Experimental data are taken from a testing series on reinforced concrete hinges subjected to eccentric compression up to their bearing capacity. These tests are simulated using the finite element (FE) software Atena science and a material model for concrete implemented therein. The first simulation is based on default input derived from measured values of Young's modulus and of the cube compressive strength of the concrete. The numerical results overestimate the initial stiffness and the bearing capacity of the tested concrete hinges. Therefore, it is concluded that concrete was damaged already before the tests. A multiscale model for tensile failure of concrete is used to correlate the preexisting damage to corresponding values of Young's modulus, the tensile strength, and the fracture energy of concrete. This allows for identifying the preexisting damage in the context of correlated structural sensitivity analyses, such that the simulated initial stiffness agrees well with experimental data. In order to simulate the bearing capacity adequately, the triaxial compressive strength of concrete is reduced to a level that is consistent with regulations according to Eurocode 2. Corresponding FE simulations suggest that the ductile structural failure of concrete hinges results from the ductile material failure of concrete at the surface of the compressed lateral notch. Finally, Eurocode-inspired interaction envelopes for concrete hinges subjected to compression and bending are derived. They agree well with the experimental data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bearing capacity of concrete hinges subjected to eccentric compression: multiscale structural analysis of experiments

et al. 2018

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“…Durch die V‐Stützen vermindert sich die Hauptspannweite von 135 m auf 105 m. Der Querschnitt wurde als Hohlkasten mit variablen Höhen von 4,5 m bis 6 m ausgeführt. Eine Besonderheit der Konstruktion sind die Betongelenke unter den V‐Stützen, die zu den am höchsten belasteten ihrer Art zählen [13].…”

Section: Maintalbrücke Gemündenunclassified

Maintalbrücke Gemünden: Bauwerksmonitoring und ‐identifikation aus einem Guss

et al. 2022

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Die Infrastruktursysteme der Industriestaaten erfordern heute und in Zukunft ein effizientes Management bei alternder Bausubstanz, steigenden Lasten und gleichbleibend hohem Sicherheitsniveau. Digitale Technologien bieten ein großes Potenzial zur Bewältigung der aktuellen und künftigen Herausforderungen im Infrastrukturmanagement. Im BMBF‐geförderten Projekt Bewertung alternder Infrastrukturbauwerke mit digitalen Technologien (AISTEC) wird untersucht, wie unterschiedliche Technologien und deren Verknüpfung gewinnbringend eingesetzt werden können. Am Beispiel der Maintalbrücke Gemünden werden ein sensorbasiertes Bauwerksmonitoring, bildbasierte Inspektion mit durch Kameras ausgestatteten Drohnen (UAS) und die Verknüpfung digitaler Bauwerksmodelle umgesetzt. Die aufgenommenen Bilder dienen u. a. als Grundlage für spätere visuelle Anomaliedetektionen und eine 3D‐Rekonstruktion, welche wiederum für die Kalibrierung und Aktualisierung digitaler Tragwerksmodelle genutzt werden. Kontinuierlich erfasste Sensordaten werden ebenfalls zur Kalibrierung und Aktualisierung der Tragwerksmodelle herangezogen. Diese Modelle werden als Grundlage für Anomaliedetektionen und perspektivisch zur Umsetzung von Konzepten der prädiktiven Instandhaltung verwendet. Belastungsfahrten und historische Daten dienen in diesem Beitrag der Validierung von kalibrierten Tragwerksmodellen.

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“…Nowadays, concrete hinges are mainly used to reduce restraint stresses in monolithic structures and to prevent the transfer of large bending moments to the foundations (thus reducing their costs). Over the past century, concrete hinges have been successfully applied in many structures and have often proven to be a superior alternative to mechanical bearings, especially in terms of maintenance costs, durability, robustness, and sustainability 1,2 . However, despite these advantages and the good experience, engineers are often reluctant to opt for concrete hinges.…”

Section: Introductionmentioning

confidence: 99%

Large‐scale experiments on concrete hinges under general loading

Markić

Kaufmann

2022

Structural Concrete

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The structural behavior of concrete hinges under general loading is far from being properly understood, which is to a large extent due to the lack of pertinent experimental data. This paper contributes to filling this knowledge gap by presenting and discussing the results of an experimental campaign on one‐way Freyssinet concrete hinges. Seven large‐scale concrete hinges were tested in the Large Universal Shell Element Tester, which allowed the investigation of their behavior under general loading by all six stress resultants. A combination of digital image correlation and distributed fiber optic measurements allowed a deeper insight into the structural behavior of the specimens. The tested hinges could sustain very high axial stresses exceeding 4.5 times the uniaxial concrete compressive strength, large rotations of over 60 mrad, and shear stresses in transverse and longitudinal directions up to 2.24 times the axial compressive stress. The resistance to bending moments about the strong axis and torques also proved to be significant. A moderate amount of reinforcement crossing the hinge throat considerably increased the shear resistance at low axial stresses and produced a ductile shear behavior.

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Unbewehrte Betongelenke – 100 Jahre Erfahrung im Brückenbau

Cited by 11 publications

References 4 publications

Bearing capacity of concrete hinges subjected to eccentric compression: multiscale structural analysis of experiments

Bearing capacity of concrete hinges subjected to eccentric compression: multiscale structural analysis of experiments

Maintalbrücke Gemünden: Bauwerksmonitoring und ‐identifikation aus einem Guss

Large‐scale experiments on concrete hinges under general loading

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