Behavior of RC-slabs under impact-loading

Abstract

Abstract. In this paper the current state of a research project on the behavior of reinforced concrete slabs subjected to impact loads are presented. As one part of the project several slabs were tested under varying conditions. As a result there failure behavior is analyzed and parameter dependences are studied. Variations like the drop height and drop mass and there substituted drop velocity and energy, the influence of the concrete strength and the level of reinforcement are part of the full project. Additional parameters like impactor size and shapes are evaluated in peripheral. Due to the large number of slabs and parameters combination a consistent database will be created for later benchmark tests and calibration of prediction models. The presented paper gives some insight in the methodology, the problems which need to be solved and first principal example results for public discussion.

Mineral-bonded composites for enhanced structural impact safety - Overview of the format, goals and achievements of the research group GRK 2250

“…The goal of the projects A5 and A6 is to assess the performance of various strengthening concepts for the impacted and for the rear sides of structural elements, respectively. The experiments are carried out in an advanced drop tower facility [20][21][22]. Besides the quantitative and empirical evaluation of the performance of the concrete plates and strengthening layers, analytical and numerical simulations are performed for quantifying the inherent dynamic effects and deriving the material related parameters both of the RC plates and of the strengthening layers under high-speed impact loading.…”

“…The experiments were carried out in a drop tower facility, developed and assembled at the Institute of Concrete Structures of TU Dresden [20,21]. The drop tower can operate in a gravitational mode with a 2.5 tones drop weight, as well as by accelerating up to 100 kg heavy projectiles using air pressure [21,34].…”

Dynamische Eigenschaften von Beton im Experiment und in der Simulation

“…B. bei der Bemessung ausgenutzt werden kann, ist fraglich, da diese sogenannte Schädigungsträgheit [4] schnell wieder abklingt und sich die lokale Beanspruchbarkeit wieder auf einen statischen Wert reduziert, s. a. [5, 6]. Die Gültigkeit dieser experimentell gewonnenen Modellvorstellungen soll im Folgenden anhand experimenteller und numerischer Methoden untersucht werden, da gerade im höheren Dehnratenbereich ab ca.…”

Messtechnische Herausforderungen bei der Analyse von hochdynamischen Aufprallbeanspruchungen

“…Experimentelle Analysen sind jedoch zur Erfassung der Zusammenhänge und zur Validierung numerischer Ergebnisse von großer Bedeutung. Der zielgerichtete Einsatz von geeigneten Messsystemen und ‐methoden ist für die Auswertbarkeit der Versuche und die korrekte Ableitung des grundlegenden Verständnisses des Tragverhaltens von Stahlbetonplatten unter Impakteinwirkung essenziell .…”