Daud, SA, Forth, JP and Nikitas, N orcid.org/0000-0002-6243-052X (2018) Time-dependent behaviour of cracked, partially bonded reinforced concrete beams under repeated and sustained loads. Engineering Structures, 163. pp. 267-280. ISSN 0141-0296
Abstract
This paper compares the flexural behaviour of cracked partially bonded (in the mid-span, maximum moment zone) reinforced concrete beams subjected to (i) static sustained load and (ii) static sustained with cyclically repeating load. Information relating to surface strains and mid-span deflections were continuously recorded for a period of 90 days. The sustained load level represented that which produced the stabilized crack pattern. The amplitude of the superimposed cyclic load was considered to be a small fraction of the sustained load. The experimental outcome shows that under sustained load alone, the long-term mid-span deflection of reinforced concrete beams with artificially debonded reinforcement is substantially higher than that of normally bonded equivalent beams. For the cyclically exerted load addition there was no substantial difference between the observed ultimate deformations of bonded and debonded beams. Nonlinear finite element software (Midas FEA) was used to simulate these results and it was found that a numerical-experimental match can be achieved after applying necessary modifications to the distribution of shrinkage down through the beams’ cross-section.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier Ltd. This is an author produced version of a paper published in Engineering Structures. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Bonds; Long-term deflection; Midas FEA; Repeated; Sustained; Tension stiffening |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/C536649/1 Gifford and Partners N/A |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Feb 2018 15:27 |
Last Modified: | 19 Mar 2019 01:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.engstruct.2018.02.054 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:127691 |
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