Strength of confined concrete according to limit analysis including sub-macroscopic composite structure of concrete

Lise Kjær Andersen, Lars German Hagsten

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review

    Abstract

    The main objective of the PhD-study is to develop physically transparent analytical models to predict the strength of actively and passively confined concrete, using the upper bound theorem of limit analysis. In contrast to classical limit analysis, where concrete is modelled as a homogeneous material, the sub-macroscopic composite structure of concrete is taken into account, aiming at understanding the mechanism of failure of confined concrete in greater detail. The present paper summarises and discusses a model of actively confined concrete by (Zhang 1997), in which failure is assumed along yield lines in the cement paste, displaced by aggregates and unhydrated cement grains. The methods and assumptions of the model will be examined, followed by suggestions of improvements. The forthcoming objectives of the PhD-study will be: (I) to implement and examine the ideas of improvement, and (II) to expand the model to become applicable to passively confined concrete.

    Original languageEnglish
    Title of host publicationProceedings of the 11th fib International PhD Symposium in Civil Engineering, FIB 2016
    Number of pages8
    PublisherFederation internationale du beton (fib)
    Publication date2016
    Pages873-880
    ISBN (Print)978-4-9909148-0-6
    ISBN (Electronic)9784990914806
    Publication statusPublished - 2016
    EventThe 11th fib International PhD Symposium in Civil Engineering - The University of Tokyo, Tokyo, Japan
    Duration: 29 Aug 201631 Aug 2016

    Conference

    ConferenceThe 11th fib International PhD Symposium in Civil Engineering
    LocationThe University of Tokyo
    Country/TerritoryJapan
    CityTokyo
    Period29/08/201631/08/2016

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