Measuring specific parameters in pretensioned concrete members using a single testing technique

J.R. Martí-Vargas, E. García-Taengua, L.A. Caro, P. Serna

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Pretensioned concrete members are designed and manufactured by using at least two materials: concrete and prestressing reinforcement. Also, two main stages must be considered: prestress transfer and member loading. Hence, the behavior of these members depends strongly on the reinforcement-to-concrete bond performance and prestress losses. In this paper, a testing technique to measure the specific parameters related with the involved phenomena is presented. The testing technique is based on the analysis of series of specimens varying in embedment length to simulate several cross sections at only one end of a pretensioned concrete member. Each specimen is characterized by means of the sequential release of the prestress transfer (detensioning) and the pull-out (loading) operation. The test provides data on prestressing force, transmission length (initial and long-term), anchorage length (without and with slip), reinforcement slips, bond stresses, longitudinal concrete strains, concrete modulus of elasticity, and prestress losses (instantaneous and time-dependent).
    Original languageEnglish
    Pages (from-to)421-432
    Number of pages12
    JournalMeasurement: Journal of the International Measurement Confederation
    Volume49
    Issue number1
    Early online date12 Dec 2013
    DOIs
    Publication statusPublished - 01 Mar 2014

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