A5037608924- High-Velocity Impact and Material Behavior
- Structural Response to Dynamic Loads
- Structural Behavior of Reinforced Concrete
- Geophysical Methods and Applications
- Civil and Structural Engineering Research
- Transportation Safety and Impact Analysis
- Structural Engineering and Materials Analysis
- Concrete Corrosion and Durability
- Metal and Thin Film Mechanics
- Combustion and Detonation Processes
- Ultrasonics and Acoustic Wave Propagation
- Engineering and Materials Science Studies
- Mechanical Behavior of Composites
- Energetic Materials and Combustion
TU Dresden
2020-2024
Impact resistance of reinforced concrete (RC) structures can be significantly improved by strengthening RC members with thin composite layers featuring high damage tolerance. Indeed, to limit the well-known vulnerability cement-based materials against impact loading, synergistic effects short fibres and continuous textile meshes as hybrid reinforcement has been proved highly beneficial. This paper addresses characterisation novel composites through accelerated drop-weight tests conducted on...
Abstract To demonstrate the potential of an ultrahigh-speed camera with frame rates beyond a million images per second for high dynamic material analysis, cylindrical concrete specimens are tested under compression at strain up to 164.3 s -1 in split Hopkinson pressure bar facility. The evaluation includes determination actual longitudinal wave propagation velocity and induced deformations. results obtained from image sequence analysis validated those by well-established gauge measuring...
Abstract Drop tower tests on beam specimens were carried out to evaluate the influence of different geometric features and loading velocities beams' response. Tested characteristics are stirrup reinforcement in addition longitudinal reinforcement, notches. The goal is quantify differences global behavior amount strains strain rates measured at positions reinforcement. This gives an insight into distributions along rebars from which bond stresses can be derived. It stated that kept together...
Abstract Versuche an Stahlbetonbalken ohne Bügel dienen häufig als vereinfachte Grundlage zur darauf aufbauenden numerischen Simulation von Stahlbetonplatten. In diesem Beitrag wird eine experimentelle Studie des Verhaltens unter Stoßbelastung vorgestellt. Die wurden im 11 m hohen Fallturm Otto‐Mohr‐Laboratoriums der TU Dresden mit zylindrischen Impaktoren 100 mm Durchmesser durchgeführt, welche Druckluft auf Geschwindigkeiten zwischen 2,7 m/s und 25,8 beschleunigt wurden. verwendeten wogen...
This study compares the blast performance of reinforced concrete (RC) slabs with and without strengthening. The strengthening strategy employed application two thin layers materials a high mutual stiffness offset, i.e. high-contrast layers. first is low-strength, low-modulus damping layer made infra-lightweight concrete, followed by second high-ductility fiber-reinforced concrete. plain RC under investigation vary in thickness either 40 mm or 100 mm. layered specimens consist thick slab...
This paper presents an experimental investigation of a 64-year-old, full-scale, simply supported, prestressed bridge girder retrofitted with external posttensioning. The specific retrofit can be used to increase the flexural strength corrosion-damaged beams. test specimen, taken from located in Virginia, was subjected monotonically increasing loads until occurrence diagonal compression failure vicinity one tendon anchor blocks. accompanied by finite-element analyses, aimed elucidate mode and...
Um Lebewesen oder Bauwerke vor Impakteinwirkungen zu schützen, können die unterschiedlichsten Herangehensweisen angewandt werden. Es kann beispielsweise Energie durch innere Reibung, plastische Verformung Abfederung absorbiert umgelenkt Möglichkeiten der Umsetzung sind lose Schüttungen, im Fall von Steinschlagschutzgalerien eingesetzt werden, geschichtete Aufbauten, wie sie zum Beispiel für Personenrüstungen Einsatz kommen. Letztere sowohl in Natur als auch Technik oft finden und dienen...
Drop tower tests help to gain understanding about the general behaviour of reinforced concrete members under impact loading and analyse strains strain rates occurring within their reinforcement. For this purpose, beam slab specimens are usually employed. The main advantage beams compared slabs is that they less complex due almost two-dimensional instead three-dimensional wave propagation them. To investigate steel rates, ten on with various energies were performed. impactor sizes velocities...