Definition of loading rate for the experimental and numerical investigation of reinforcement’s bond in concrete under impact loading

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review

Contributors

Abstract

Reinforced concrete (RC) structures are increasingly subjected to extreme loading events e.g. impacts, explosions, earthquakes. RC is a composite material. For the load transfer between its two components concrete and reinforcing steel adequate bond is required. The work presented herein provides insights into experimental testing and numerical modelling of bond behavior. It aims to create a better understanding of its changed characteristics under dynamic compared to static loading. Dynamic bond stress-slip relationships are obtained during especially designed push-in tests, since conventional pull-out tests are rather unsuitable for dynamic testing. The used experimental setup and the evaluation process are described. The influence of different slip measurement approaches on the overall bond stress-slip relationship is illustrated. In addition, the definition of loading rate based on the slip increase in time is proposed. The experimental results indicate an increase of maximal bond stress with increasing loading rate, which agrees with known results from literature. Insights into the local behavior in the vicinity of the bond zone are given by the numerical simulation in LS-Dyna. The numerical results match the experimental observations well.

Details

Original languageEnglish
Title of host publicationHigh Tech Concrete
EditorsD.A. Hordijk, M. Lukovic
Publisherfib. The International Federation for Structural Concrete
Pages929-937
Number of pages9
ISBN (electronic)978-3-319-59471-2
ISBN (print)978-3-319-59470-5
Publication statusPublished - 2018
Peer-reviewedYes

Publication series

Seriesfib Symposium
ISSN2617-4820

Conference

TitleInternational fib Symposium on High Tech Concrete: Where Technology and Engineering Meet, 2017
Duration12 - 14 June 2017
CityMaastricht
CountryNetherlands

External IDs

ORCID /0000-0002-9490-606X/work/154741782
ORCID /0000-0002-1596-7164/work/154742313

Keywords

Keywords

  • Experiment, Finite element analysis, Impact loading, Reinforcement’s bond