Investigation of reinforced concrete beams in serviceability limit state

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

    Abstract

    This paper investigates how cracking influence the stiffness of flexural members. Stress levels and crack development under service loads are highly dependent on the reinforcement arrangement, which is often based on the ultimate limit state design. Furthermore, practical design of the serviceability limit state is often based on empirical and conservative estimates where the influence of certain dominating mechanisms is ignored, such as tension-stiffening. The reinforcement arrangement is, therefore, frequently modified, involving an increase in the amount of reinforcement, to meet the serviceability limit state requirements. A simple analytical approach to calculate the flexural stiffness is thus proposed, based on physical assumptions concerning tension-stiffening and concrete mechanics. The tension-stiffening effect and its importance on the deflection are investigated, and a comparison with tests shows good agreement. Additionally, different assumptions concerning the estimate of the mean crack distance are investigated and compared.
    Original languageEnglish
    Title of host publicationProceedings of the 11th fib International PhD Symposium in Civil Engineering, FIB 2016
    EditorsKoichi Maekawa, Akaio Kasuga, Jun Yamazaki
    Number of pages8
    PublisherFederation internationale du beton (fib)
    Publication date2016
    Pages157-164
    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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