Experimentelle Untersuchung von Stahlbetonbalken ohne Bügelbewehrung unter Stoßbelastung

Research output: Contribution to journalResearch articleContributedpeer-review

Abstract

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.
Translated title of the contribution
Experimental study of reinforced concrete beams without stirrups under impact
performance evaluation and structural response

Details

Original languageGerman
Pages (from-to)272-283
Number of pages12
JournalBeton- und Stahlbetonbau
Volume119
Issue number4
Early online date13 Feb 2024
Publication statusPublished - Apr 2024
Peer-reviewedYes

External IDs

Scopus 85184704590
Mendeley ca354780-a989-3aec-b0d0-cff7954d741b
ORCID /0000-0001-6916-0086/work/155290279
ORCID /0000-0003-0398-2735/work/155292016
ORCID /0000-0001-6666-5388/work/155292106
ORCID /0000-0002-9490-606X/work/155292175

Keywords

Keywords

  • impact loading, punching cone failure, accelerated impactor, digital image correlation, impact, experimental study, shear deficient reinforced concrete beams, accelerated impactor, digital image correlation, experimental study, impact, impact loading, punching cone failure, shear deficient reinforced concrete beams