Characterization and modeling of thin-walled carbon-reinforced concrete membranes exposed to multiaxial stress and cracking | Funding Period 2
Owing to their specific mechanical behavior, mineral composites with carbon fiber-reinforced polymer (CFRP) reinforcement call for tailored structural shapes that primarily transfer loads via in-plane compressive or tensile membrane actions. To efficiently design the structural performance of such structures, profound knowledge of the constitutive laws governing different stress transfer mechanisms (STMs) activated within cracked carbon-reinforced concrete (CRC) is crucial. However, research to characterize the constitutive laws of these STMs in CRC under multi-axial stress conditions is still in its early stages. Therefore, in period 2, we will focus on
- the systematic experimental characterization and mechanical modeling of constitutive laws,
- the exploration of the complex interaction behavior of STMs in CRC components, and
- CRC membranes with biaxial cracking.
A systematic experimental campaign will be conducted to characterize compression softening in biaxially cracked CRC, as well as stress transfer in straight and undulated cracks. Cracked CRC membranes will be subjected to systematically varied combinations of axial and shear loads using the combined torsion and axial force testing apparatus TorAx. Additionally, more detailed insights into the behavior of embedded yarns inside concrete specimens will be obtained using computer tomography during the testing of the STMs.
The experimental outcomes will be used to calibrate mechanically based constitutive models that are valid for different combinations of reinforcements and concrete matrices, accounting for effects related to additive manufacturing or extrusion.
Scientists
![[Translate to English:] Marton Claßen](/fileadmin/_processed_/a/5/csm_A-Classen_Quadratisch_ef8c569abf.jpg "Prof. Dr.-Ing. Martin Claßen")
D-52074 Aachen (Germany)
52074 Aachen (Germany)
Cooperations
Ehemalige | Former involved
Prof. em. Dr.-Ing. Dr.-Ing. E. h. Josef Hegger (project manager, RWTH Aachen, 07/2020 – 06/2024)
Sven Bosbach (doctoral researcher, RWTH Aachen, 07/2020 – 06/2024)
Characterisation and Modelling of Thin-Walled, Carbon Reinforced Concrete Membranes under Multi-Axial Stress Conditions | Funding Period 2
Composites with non-metallic reinforcements are characterized by high compressive and tensile strength and have high potential for use in thin-walled structures such as double-curved shell structures or webs of beams. However, the load-bearing mechanisms of carbon-reinforced concrete under membrane stress states have not yet been sufficiently investigated and it is not clear whether strut-and-tie models and compression field theories developed for membrane stress states in steel-reinforced concrete can be transferred to carbon-reinforced concrete.
Within the project, a new method for characterization of carbon-reinforced concrete membranes under multi-axial stress conditions will be developed, which allows a detailed investigation of all mechanisms involved in load transfer. Novel experimental setups eliminate the deficits of known test methods and allow for reliable and reproducible characterization of all constitutive laws. Based on the results, a new compression field theory will be developed which allows us to predict the structural response of carbon-reinforced concrete membranes.
Associated with the project C02 is the supplementary project C02*: Systematic investigations on the interaction of shear force bearing components in shear force models.
Publikationen | Publications
Backes, J. G.; Schmidt, L.; Bielak, J.; Del Rosario, P.; Traverso, M.; Claßen, M. (2023) Comparative Cradle-to-Grave Carbon Footprint of a CFRP-Grid Reinforced Concrete Façade Panel in Sustainability 15, 11548 – DOI: 10.3390/su151511548
Becks, H.; Bielak, J.; Camps, B.; Hegger, J. (2021) Application of fiber optic measurement in textile-reinforced concrete testing in: Structural Concrete 23, p. 2600–2614 – DOI: 10.1002/suco.202100252
Becks, H.; Schmidt, M.; Bosbach, S.; Classen, M. (2024) Large-scale combined torsional and axial loading system (TorAx) – A new perspective on multiaxial testing of fracture and stress transfer in plain and reinforced concrete in: Engineering Structures 302, 117391 – DOI: 10.1016/j.engstruct.2023.117391
Bosbach, S.; Bielak, J.; Schmidt, C.; Hegger, J.; Classen, M. (2023) Influence of transverse tension on the compressive strength of carbon reinforced concrete in: Proc. of 11th Int. Conf. on Fiber-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2023), 17.–19.05.2023 in Rio de Janeiro (Brazil), paper 328 – DOI: 10.5281/zenodo.8108957
Bosbach, S.; Hegger, J.; Claßen, M. (2023) Dowel action of textile CFRP shear reinforcement in carbon reinforced concrete in: Construction and Building Materials 411 – DOI: 10.1016/j.conbuildmat.2023.134106
Bosbach, S.; Hegger, J.; Claßen, M. (2023) Untersuchungen zur Dübelwirkung in Carbonbetonbauteilen in: Claßen, M.; Hegger, J.; Matschei, T.; Raupach, M. [eds.] Beiträge zur 10. DAfStb-Jahrestagung mit 62. Forschungskolloquium, 26./27.09.2023 in Aachen, p. 119–130 – DOI: 10.18154/RWTH-2023-08021
Bosbach, S.; Kalthoff, M.; Morales Cruz, C.; Adam, V.; Matschei, T.; Classen, M. (2023) Digital Prefabrication of Lightweight Building Elements for Circular Economy: Material-Minimised Ribbed Floor Slabs Made of Extruded Carbon Reinforced Concrete (ExCRC) in: Buildings 13, issue 12, 2928 – DOI: 10.3390/buildings13122928
Bosbach, S.; Schmidt, M.; Becks, H.; Claßen, M.; Hegger, J. (2022) Investigations on shear transfer by aggregate interlock with a unique test setup (TorAx) in: Zingoni, A. [ed.] Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems – Proceedings of The 8th International Conference on Structural Engineering, Mechanics and Computation, London: CRC Press, p. 1265–1270.
Bosbach, S.; Schmidt, M.; Claßen, M.; Hegger, J. (2022) Investigations on dowel action in carbon reinforced concrete in: Stokkeland, S.; Braarud, H. C. [eds.] Concrete Innovation for Sustainability – Proc. for the 6th fib International Congress 2022, 12.–16.06.2022 in Oslo (Norway), Oslo: Novus Press, p. 1809–1819.
Bosbach, S.; Schmidt, C.; Hegger, J.; Classen, M. (2024) Influence of Concrete Cover on Compression Softening of Carbon reinforced Concrete in: Fehling, E.; Middendorf, B.; Thiemicke, J. [eds.] Proc. of HiPerMat 2024 – 6th Int. Symp. On Ultra-High Performance Concrete and High Performance Building Materials for Sustainable Construction, 06.–08.03.2024 in Kassel, p. 59–63 – Link Proc.
Fattahi, M.; Schmidt, M.; Bosbach, S.; Noel, M.; Hegger, J.; Classen, M. (2023) Evaluation of FRP-reinforced concrete members without shear reinforcement – Analysis using Shear Crack Propagation Theory (SCPT) in: Proc. of 11th Int. Conf. on Fiber-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2023), 17.–19.05.2023 in Rio de Janeiro (Brazil), paper 103 – DOI: 10.5281/zenodo.8092110
Kalthoff, M.; Bosbach, S.; Backes, J.; Morales Cruz, C.; Traverso, M.; Claßen, M.; Raupach, M.; Matschei, T. (2023) Fabrication of lightweight, carbon textile reinforced concrete components with internally nested lattice structure using 2-layer extrusion by LabMorTex in: Construction and Building Materials 395, 132334 – DOI: 10.1016/j.conbuildmat.2023.132334
Kalthoff, M.; Bosbach, S.; Matschei, T.; Raupach, M.; Claßen, M.; Hegger, J. (2022) Investigations on material-minimized slabs made of extruded carbon reinforced concrete in: Stokkeland, S.; Braarud, H. C. [eds.] Concrete Innovation for Sustainability – Proc. for the 6th fib International Congress 2022, 12.–16.06.2022 in Oslo (Norway), Oslo: Novus Press, p. 1047–1057.
Liebold, F.; Bergmann, S.; Bosbach, S.; Adam, V.; Marx, S.; Claßen, M.; Hegger, J.; Maas, H.-G. (2023) Photogrammetric Image Sequence Analysis for Deformation Measurement and Crack Detection Applied to a Shear Test on a Carbon Reinforced Concrete Member in: Ilki, A.; Çavunt, D.; Çavunt, Y. S. [eds.] Building for the Future: Durable, Sustainable, Resilient – Proc. of fib Symposium 2023, 05.–07.06.2023 in Istanbul (Turkey), publ. in: Lecture Notes in Civil Engineering 350, Cham: Springer, p. 1273–1282 – DOI: 10.1007/978-3-031-32511-3_130
Morales Cruz, C., Bosbach, S., Kalthoff, M., Beckmann, B., Matschei, T. and Classen, M. (2024), Materialminimierte Rippen- und Wabendecken aus extrudierten Carbonbetonstegen. Beton- und Stahlbetonbau, 119: 873-881. https://doi.org/10.1002/best.202400069
Platen, J.; Storm, J.; Bosbach, S.; Claßen, M.; Kaliske, M. (2024) The microlayer model: A novel analytical homogenisation scheme for materials with rigid particles and deformable matrix matrix – applied to simulate concrete in: Computers & Structures 293, 107258 – DOI: https://doi.org/10.1016/j.compstruc.2023.107258
Studentische Arbeiten | Student's theses
Nashef, M. (2021) Untersuchungen zur Druck-Zug-Festigkeit von Carbonbeton [Bachelorarbeit | Bachelor's thesis]
Bachem, J. (2022) Untersuchungen zum Compression Softening in Carbonbeton [Bachelorarbeit | Bachelor's thesis]
Gerst, L. (2022) Untersuchungen zum Einfluss einer Querzugbelastung auf die Druckfestigkeit von Carbonbeton [Bachelorarbeit | Bachelor's thesis]
Gümüskaya, B. (2022) Experimentelle und numerische Untersuchungen zur Herstellung von extrudierten carbonbewehrten aufgelösten Deckenelementen [Masterarbeit | Master's thesis] (mit | with D02)
Löb, M. (2022) Untersuchungen zur Rissreibung mit einer neuartigen kombinierten Torsions- und Axialkraftprüfmaschine [Masterarbeit | Master's thesis]
Mayer, M. (2022) Entwicklung eines Druckfeldmodells für Bauteile mit Querkraftbewehrung [Masterarbeit | Master's thesis]
Singraven, J. (2022) Untersuchungen zur Druck-Zug-Festigkeit von gerissenen Carbonbetonmembranen [Masterarbeit | Master's thesis]
Stöhr, B. (2022) Untersuchungen zur Dübelwirkung in querkraftbewehrten Carbonbetonbauteilen [Masterarbeit | Master's thesis]
Bouafi, S. (2023) Untersuchungen zum Einfluss einer Querzugbelastung auf die Druckfestigkeit von Carbonbeton [Bachelorarbeit | Bachelor's thesis]
Brahimi, F. (2023) Experimentelle Untersuchungen zum Materialverhalten einer modifizierten Carbonbewehrung [Bachelorarbeit | Bachelor's thesis] (mit | with B03)
Koh, G.-H. (2023) Untersuchungen zur Herstellung und Prüfung von dünnwandigen Betonrohren für eine neuartige kombinierte Torsions- und Axialkraftprüfmaschine [Bachelorarbeit | Bachelor's thesis]
Mesecar, Z. (2023) Untersuchungen zum Tragverhalten von Carbonbeton unter kombinierter Druck- und Querzugbelastung [Bachelorarbeit | Bachelor's thesis]
Nelleßen, L. (2023) Untersuchungen zur Dübelwirkung der Querkraftbewehrung in Carbonbetonbauteilen [Bachelorarbeit | Bachelor's thesis]
Rosenkranz, M. (2023) Experimentelle Untersuchungen zur Dübelwirkung der Längsbewehrung in Carbonbetonbauteilen [Bachelorarbeit | Bachelor's thesis]
Schütte, E. (2023) Untersuchungen zum Einfluss der Längsdehnung und des Bewehrungsgrades auf die Dübelwirkung der Biegezugbewehrung in Carbonbetonbauteilen [Bachelorarbeit | Bachelor's thesis]
Spangemacher, P. (2023) Experimentelle Untersuchungen zur Dübelwirkung in querkraftbewehrten Carbonbetonbauteilen [Bachelorarbeit | Bachelor's thesis]
Thoeren, T. (2023) Untersuchungen zum Einfluss schiefwinkliger Bewehrung auf die Druckfestigkeit von Carbonbeton unter gleichzeitig wirkendem Querzug [Bachelorarbeit | Bachelor's thesis]