Predicting the creep strain of PVA-ECC at high stress levels based on the evolution of plasticity and damage

Benny Suryanto, Koichi Maekawa, Kohei Nagai

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    This paper describes a method for estimating creep deformations of PVA-ECC under high stress levels from short-term tests. To obtain necessary data, a series of accelerated bending and compression creep tests under a sequence of increasing loads were carried out. Of particular interest was to study the evolution of plasticity and damage under varying load levels, and thus allow the rate of plasticity and fracturing as functions of evolving strain and fracture to be determined. Based on these behavioral aspects, predictions of creep of ECC at high stress levels were made. It is found that creep rupture in flexure and compression occurs at nearly the same order of lifetime in a logarithm scale, being the rupture at 90% of flexural strength about one order longer than that under compression. The tensile and compressive strains at rupture, when the load level is decreased from 90% to 75% of the short-term strength, are 1.1-1.4 and 1.6-3.5 times the short-term tensile and compression strain capacities, respectively.
    Original languageEnglish
    Pages (from-to)35-48
    Number of pages14
    JournalJournal of Advanced Concrete Technology
    Volume11
    Issue number2
    Early online date17 Feb 2013
    DOIs
    Publication statusPublished - 17 Feb 2013

    Keywords

    • SHCC
    • creep
    • ECC
    • time-dependent

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