ATENA — A tool for engineering analysis of fracture in concrete

Abstract

Advanced constitutive models implemented in the finite element system ATENA serve as rational tools to explain the behaviour of connection between steel and concrete. Three nonlinear material models available in ATENA are described: crack band model based on fracture energy, fracture-plastic model with non-associated plasticity and microplane material model. Nonlinear simulation using these advanced constitutive models can be efficiently used to support and extend experimental investigations and to predict behaviour of structures and structural details.

Influence Of The Gripping Fixture On The Modified Compact Tension Test Results: Evaluation Of The Experiments On Cylindrical Concrete Specimens

“…This avoids bending of the drawing bars and, as a consequence, the moment at the ligament so that the MCT specimen behavior approaches to that experienced by the CT test. MCT specimens are cut of the prepared cylinders for standard pressure test, but former contributions indicates the convenience of using a plastic pipe of the internal diameter 153 mm, as casting mold, see [2] and [5].…”

“…In the first case, the three point bending test (3PB) is applied to smaller beams either of dimensions 40 × 40 × 160 (120) mm 3 or 100 × 100 × 400 (300) mm 3 without reinforcement, see e.g. [2], [6] or [19]. In the second case the four point bend test (4PB) is applied mostly on larger reinforced concrete beams.…”

“…Another approach for applying the splitting load to the specimen is proposed in [10] where two steel loading frames were applied instead of two holes for pins, although on a cubic shaped CT specimen. Cifuentes et al recently postulated the study of the applicability of MCT specimen for measuring the fracture energy of concrete that indicates very promising consistency of the specific fracture energy value for different widths and notch depths, were also the comparison of the MCT test with the traditional fracture test 3PB were carried out, see in [2] The aim of this contribution is to compare the data obtained from standard compression test performed on 150 × 300 mm cylinders in the laboratory of Faculty of Civil Engineering Brno University of Technology with those obtained from the modified compact tension test performed in the laboratory of the University of Oviedo. The MCT specimens have cylindrical shape with diameter 150 mm and thickness 60 mm.…”

Betonbau hat Zukunft – Visionen werden Realität

“…Dieses Bemessungskonzept ermöglicht die Berücksichtigung des erforderlichen Sicherheitsniveaus und der Umweltbedingungen durch integrale modelltechnische Untersuchungen in Kombination mit gesamtheitlichen Überwachungskonzepten. Die Untersuchungen stüt-zen sich je nach Nachweisintensität auf versuchstechnisch ermitteltes nichtlineares Materialverhalten [8] und auf Berechnungsmethoden höherer Ordnung [9]. Sie ermöglichen zum Teil bereits die Inkludierung von unsicheren Modelleingangsgrößen mittels statistischer (probabilisticher) Simulationstechniken [10], [11] [19] Fig.…”

Bauwerksüberwachung der Autobahnbrücke Gossensaß

“…SARA Studio (Bild 12) basiert auf den Paketen ATENA und FREET [6]. Das FE-Programm ATENA [19] dient der nichtlinearen Simulation von Beton-und Stahlbetonstrukturen. Das probabilistische Analyseprogramm FREET [20] ermög-licht die Berücksichtigung von streuenden Eingangsgrößen bei der Formulierung von analytischen Grenzzustandsfunktionen und auch Antwortfunktionen.…”