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A laboratory charac...
A laboratory characterisation of the response of intact chalk to cyclic loading
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- Ahmadi Naghadeh, Reza, 1982 (författare)
- Jönköping University,JTH, Byggnadsteknik och belysningsvetenskap
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- Liu, Tingfa (författare)
- Imperial College of Science, Technology and Medicine,Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom
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- Vinck, Ken (författare)
- Imperial College of Science, Technology and Medicine,Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom
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- Jardine, Richard J. (författare)
- Imperial College of Science, Technology and Medicine,Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom
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- Kontoe, Stavroula (författare)
- Imperial College of Science, Technology and Medicine,Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom
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- Byrne, Byron W. (författare)
- Imperial College of Science, Technology and Medicine,Department of Engineering Science, University of Oxford, Oxford, United Kingdom
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- McAdam, Ross A. (författare)
- University Of Oxford,Department of Engineering Science, University of Oxford, Oxford, United Kingdom
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(creator_code:org_t)
- 2022-04-19
- 2022
- Engelska.
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Ingår i: Geotechnique. - : Thomas Telford Ltd.. - 0016-8505 .- 1751-7656. ; In Press
- Relaterad länk:
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https://doi.org/10.1...
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https://research.cha...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- This paper reports the cyclic behaviour of chalk, which has yet to be studied comprehensively. Multiple undrained high-resolution cyclic triaxial experiments on low- to medium-density intact chalk, along with index and monotonic reference tests, define the conditions under which either thousands of cycles could be applied without any deleterious effect, or failure could be provoked under specified numbers of cycles. Intact chalk's response is shown to differ from that of most saturated soils tested under comparable conditions. While chalk can be reduced to putty by severe two-way displacement-controlled cycling, its behaviour proved stable and nearly linear visco-elastic over much of the one-way, stress-controlled loading space examined, with stiffness improving over thousands of cycles, without loss of undrained shear strength. However, in cases where cyclic failure occurred, the specimens showed little sign of cyclic damage before cracking and movements on discontinuities led to sharp pore pressure reductions, non-uniform displacements and the onset of brittle collapse. Chalk's behaviour resembles the fatigue response of metals, concretes and rocks, where micro-shearing or cracking initiates on imperfections that generate stress concentrations; the experiments identify the key features that must be captured in any representative cyclic loading model.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Geoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Geotechnical Engineering (hsv//eng)
Nyckelord
- triaxial
- fatigue
- chalk
- laboratory testing
- cyclic loading
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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