3D printed beams
Abstract: This study investigates the structural behaviour of different reinforcement concepts for extrusion-based 3D concrete printed beams. As longitudinal reinforcement, unbonded post-tensioning and passive bonded reinforcement are explored. As shear reinforcement, fibres and cables placed between the layers of concrete are analysed. The results of four-point bending tests show that unbonded reinforcement leads to highly brittle failure without a proper activation of the shear reinforcement. The beams with conventional bonded reinforcement behave monolithically, with little influence of the concrete layering. Cables, as well as fibres, increase the shear resistance significantly. While cables have higher efficiency, fibres lead to finer and more closely spaced cracks.
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Join us for the 13th edition of the fib International PhD Symposium in Civil Engineering. Since its conception in 1996, this PhD Symposium has evolved into a highly respected scientific meeting, connecting young researchers and high-profile scientists alike.
This event provides an excellent opportunity for PhD students to share scientific thoughts and findings with the international research community from all over the world in the following fields: innovation in materials and structures, construction technology, structural analysis and design, durability and life assessment, sustainability and life cycle assessment and monitoring and strutural assessment.
In response to the current circumstances, the Organising Committee of the PhD Symposium in Paris has decided in accordance with the fib to hold an online PhD Symposium on 26-28 August 2020 and an in-person Symposium on 21-23 July 2021 in Paris, France.
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The fib, Fédération internationale du béton, is a not-for-profit association formed by 42 national member groups and approximately 1000 corporate and individual members. The fib’s mission is to develop at an international level the study of scientific and practical matters capable of advancing the technical, economic, aesthetic and environmental performance of concrete construction.
The knowledge developed and shared by the fib (fib Bulletins, fib events, fib workshops, fib courses, etc.) is entirely the result of the volunteer work provided by the fib members.
The fib was formed in 1998 by the merger of the Euro-International Committee for Concrete (the CEB) and the International Federation for Pre-stressing (the FIP). These predecessor organizations existed independently since 1953 and 1952, respectively.
