Bond behaviour and crack propagation of reinforced concrete under long-term loading

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

Abstract

Cracks are part of every reinforced concrete component and affect the durability and serviceability of those. The crack width may grow under long-time loading, which is mainly caused by bond creep. Current investigations at the Technische Universität Dresden focus on the bond behaviour and the bond stress distribution of ribbed steel bars under long-term loading. Different kinds of concrete are used, reaching from a mean uniaxial strength of fcm = 30 MPa up to fcm = 70 MPa. The experimental program includes systematic investigations of the influence of the bond length on the ultimate bond stress using pull-out tests and beamend tests as well. In addition, tension tie tests under sustainable loading are conducted, the results of which will be used to validate calculated crack widths. The bond behaviour is detected by displacement transducers and fibre-optic sensors, which enable the quasi-continuous recording of strain. Based on the local resolution of the strain along an embedded steel bar, conclusions about the force transmission between reinforcement and concrete are made.
This article deals with the experimental and instrumental setup, results of the first test series and
the procedure of evaluation. Furthermore, the results are compared to existing bond models and the
influence of the test specimen and the bond length are discussed.

Details

Original languageEnglish
Title of host publicationProceedings of the 26th International Conference on Structural Mechanics in Reactor Technology (SMiRT 26)
EditorsInternational Assn for Structural Mechanics in Reactor Technology (IASMiRT)
PublisherCurran Associates
Number of pages10
ISBN (print)9781713872795
Publication statusPublished - 15 Jul 2022
Peer-reviewedYes

Conference

Title26th International Conference on Structural Mechanics in Reactor Technology
Abbreviated titleSMiRT26
Conference number
Duration10 - 15 July 2022
Degree of recognitionInternational event
Location
CityBerlin/Potsdam
CountryGermany

External IDs

ORCID /0000-0002-7909-5895/work/146166497
ORCID /0000-0002-1596-7164/work/146167359

Keywords