Impact damage characterization at RC plates with planar tomography and FEM

Publikation: Beitrag zu KonferenzenPaperBeigetragenBegutachtung

Beitragende

Abstract

Prediction of dynamic effects of reinforced concrete structures under impact loading is a technical challenge. This is a consequence of the great variability of the physical properties resulting from the wide adaptability of reinforced concrete and a consequence of the wide range of impact loading. Experiments and numerical investigations are normally used on a small scale to address the problem. In this paper, impact tests on reinforced conrete plates with the lateral dimensions of 1.5 m x 1.5 m and a thickness of 30 cm are presented. In bending reinforcement, besides the velocity two properties are varied, the diameter and the spatial distribution of the rebars. Experiments are performed at the Otto-Mohr-Laboratory of the Institute of Concrete Structures of the Technische Universit¨at Dresden. Due to the accelerated fall of the impactor the velocity ranges between 20 and 70 m/s. In addition to the measured quantities such as bearing forces, accelerations are also measured at 4 different positions on and under the plate, as well as the deflection at several positions. The measured data are used for the analysis of the damage form and the numerical examinations with the program Ansys Autodyn and the material model after Drucker-Prager.

Numerical investigations support the tests, with detailed analysis of individual effects. These numerical computations and the planar tomographic investigations were carried out at BAM in Berlin. With the help of planar tomographic evaluation, the damaged structure is

made visible and compared with the numerical results. Influences of the bending reinforcement are explained on the basis of damage evaluation in the local area and on selected measured values. In addition to the test evaluation, the tomographic and numerical methods are presented

Details

OriginalspracheEnglisch
Seiten2521-2543
Seitenumfang23
PublikationsstatusVeröffentlicht - 2020
Peer-Review-StatusJa

Konferenz

TitelXI International Conference on Structural Dynamics
KurztitelEURODYN 2020
Veranstaltungsnummer
Dauer23 - 26 November 2020
BekanntheitsgradInternationale Veranstaltung
Ort
StadtAthen
LandGriechenland

Externe IDs

Scopus 85098710313
ORCID /0000-0002-1596-7164/work/111044181
ORCID /0000-0002-1825-1946/work/141545481
ORCID /0000-0003-2440-5670/work/142236539
ORCID /0000-0002-9010-2734/work/161410009

Schlagworte

Schlagwörter

  • post-impact evaluation, damage characterization, planar tomography, reinforced concrete structure, Drucker-Prager, Ansys Autodyn