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Experimentelle Untersuchung von Stahlbetonbalken ohne Bügelbewehrung unter Stoßbelastung.
Experimentelle Untersuchung von Stahlbetonbalken ohne Bügelbewehrung unter Stoßbelastung.
- Source :
-
Beton- Und Stahlbetonbau . Apr2024, Vol. 119 Issue 4, p272-283. 12p. - Publication Year :
- 2024
-
Abstract
- Experimental study of reinforced concrete beams without stirrups under impact: performance evaluation and structural response Experiments on reinforced concrete beams without stirrups are often utilized as a simplified basis to calibrate numerical models of reinforced concrete slabs. This paper details an experimental study on the behavior of reinforced concrete beams without stirrups subjected to impact loading. For this study, the 11‐meter‐high drop tower at the Otto Mohr Laboratory of TU Dresden was used to accelerate a cylindrical impactor with a diameter of 100 mm. Compressed air accelerated the impactor to velocities between 2.7 m/s and 25.8 m/s. The impactor masses were 14.22 kg and 21.66 kg, respectively. Data on impactor and support forces, displacements, and accelerations were collected. Digital image correlation supplemented the measurements. The study revealed that the behavior of the beams exhibited different failure modes depending on the impactor velocity and mass. The shear cracks started to form at impactor velocities of approximately 11 m/s, corresponding to the lighter impactor's kinetic energy of 860 J. Furthermore, the formation of a punching cone near the loading point at impactor velocities of around 22 m/s was observed. These findings provide valuable insights for designing and thoroughly assessing the performance of shear‐deficient reinforced concrete beams under impact loading. The results serve as a foundation for enhancing the precision and reliability of numerical models, facilitating further investigations into complex structural systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00059900
- Volume :
- 119
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Beton- Und Stahlbetonbau
- Publication Type :
- Academic Journal
- Accession number :
- 176473820
- Full Text :
- https://doi.org/10.1002/best.202300101