%0 Journal Article %1 kromoser_second-generation_2019 %A Kromoser, Benjamin %A Gericke, Oliver %A Hammerl, Mathias %A Sobek, Werner %D 2019 %J Materials %K CFRP CFRP, UHPC, concrete concrete, construction, elements engineering for implants in introduction load metal reinforcement, sobek structures, sustainable thin-walled %N 23 %P 3973 %R 10.3390/ma12233973 %T Second-generation implants for load introduction into thin-walled CFRP-reinforced UHPC beams: implant optimisation and investigations of production technologies %V 12 %X Combining two high-performance materials—ultra-high-performance concrete (UHPC) as the matrix and carbon-fibre-reinforced composites (CFRP) as the reinforcement—opens up new possibilities for achieving very lightweight thin-walled concrete elements. This strategy, however, leads to a higher degree of material utilisation, resulting in the generation of higher forces around load introduction points and supports. The authors present a solution for increasing the performance of supports of very slender CFRP-reinforced UHPC beams by using metal implants. Implants are used in place of concrete in regions of stress concentrations and significant deviation forces. These are able to transfer high stresses and forces e ciently due to their ability to sustain both tension and compression in equal measure. A key issue in their development is the interface between the reinforced concrete and metal implant. Building on previous research, this paper deals with the conceptual design of three types of implants manufactured from di erent metals and with three di erent types of automated production technologies (water-jet cutting, metal casting with a 3D-printed plastic formwork and binder jetting of steel components). For this paper, tests were carried out to determine the load-bearing behaviour of beams with the three di erent types of support implants used for load introduction at the supports. A carbon rod served as bending reinforcement and a pre-formed textile reinforcement cage served as shear and constructive reinforcement.

@article{kromoser_second-generation_2019, abstract = {Combining two high-performance materials—ultra-high-performance concrete (UHPC) as the matrix and carbon-fibre-reinforced composites (CFRP) as the reinforcement—opens up new possibilities for achieving very lightweight thin-walled concrete elements. This strategy, however, leads to a higher degree of material utilisation, resulting in the generation of higher forces around load introduction points and supports. The authors present a solution for increasing the performance of supports of very slender CFRP-reinforced UHPC beams by using metal implants. Implants are used in place of concrete in regions of stress concentrations and significant deviation forces. These are able to transfer high stresses and forces e ciently due to their ability to sustain both tension and compression in equal measure. A key issue in their development is the interface between the reinforced concrete and metal implant. Building on previous research, this paper deals with the conceptual design of three types of implants manufactured from di erent metals and with three di erent types of automated production technologies (water-jet cutting, metal casting with a 3D-printed plastic formwork and binder jetting of steel components). For this paper, tests were carried out to determine the load-bearing behaviour of beams with the three di erent types of support implants used for load introduction at the supports. A carbon rod served as bending reinforcement and a pre-formed textile reinforcement cage served as shear and constructive reinforcement.}, added-at = {2023-11-27T15:10:57.000+0100}, author = {Kromoser, Benjamin and Gericke, Oliver and Hammerl, Mathias and Sobek, Werner}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2a4c57e0464372e62bb50d935a871b66f/jmueller}, doi = {10.3390/ma12233973}, interhash = {b3757ac37d65232eb23899c5191f9bff}, intrahash = {a4c57e0464372e62bb50d935a871b66f}, issn = {1996-1944}, journal = {Materials}, keywords = {CFRP CFRP, UHPC, concrete concrete, construction, elements engineering for implants in introduction load metal reinforcement, sobek structures, sustainable thin-walled}, number = 23, pages = 3973, timestamp = {2023-11-27T15:10:57.000+0100}, title = {Second-generation implants for load introduction into thin-walled {CFRP}-reinforced {UHPC} beams: implant optimisation and investigations of production technologies}, volume = 12, year = 2019 }