Modelling of tension stiffening for normal and high strength concrete

Morten Bo Christiansen, Mogens Peter Nielsen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Accurate calculations of the stiffness of concrete members are rare. Only in the uncracked state and the fully cracked state, where the reinforcement is near yielding, the stiffness calculations are relatively easy. The difficulties are due to the fact that concrete between cracks may give a substantial contribution to the stiffness, a phenomenon which is generally referred to as tension stiffening. The present paper describes a new theory of tension stiffening. It is based on a simple physical model for pure tension, which works with three different stages of crack generation. In a simplified form the model is extended to apply to biaxial stress fields as well. To determine the biaxial stress field, the theorem of minimum complementary elastic energy is used. The theory has been compared with tests on rods, disks, and beams of both normal and high strength concrete, and very good results are obtained.Keywords: Reinforced concrete, tension stiffening, cracked state stiffness, energy methods, rods, beams, disks.
    Original languageEnglish
    Title of host publicationProc. Int. Conf. HPHSC
    Place of PublicationPerth
    PublisherCURTIN University
    Publication date1998
    Pages325-340
    Publication statusPublished - 1998
    EventInternational Conference on High Performance High Strength Concrete (HPHSC) - Perth, Australia
    Duration: 10 Aug 199812 Aug 1998

    Conference

    ConferenceInternational Conference on High Performance High Strength Concrete (HPHSC)
    CountryAustralia
    CityPerth
    Period10/08/199812/08/1998

    Cite this