Parameter identification for degrading and pinched hysteretic structural concrete systems

    Authors

    S. K. Kunnath; J. B. Mander;L. Fang

    Comments

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    Abbreviated Journal Title

    Eng. Struct.

    Keywords

    hysteretic behavior; modelling; reinforced concrete; seismic action; system identification; RANDOM VIBRATION; Engineering, Civil

    Abstract

    Hysteretic models are frequently used to predict the non-linear behavior of reinforced concrete structural systems. Such models are typically characterized by control parameters that have to be calibrated from observed experimental testing. A system identification methodology is presented in this paper for determining the values of control parameters in a continuously smooth hysteretic model for inelastic dynamic behavior of structural concrete systems, The technique is based on a modified Gauss-Newton approach in which a non-linear relationship between model parameters and the force-deformation or moment-curvature hysteretic loops is assumed. The methodology is applied to an extended version of the well known rate-dependent Bouc-Wen hysteretic model, Six control parameters are introduced into the model which influence the degrading characteristics and, therefore, represent the target parameters that need to be optimized. The versatility of the approach is demonstrated through sample simulations of observed behavior which are drawn from reinforced and partially prestressed concrete elements and subassemblages including beams, columns and beam-column joints. Studies of convergence of the proposed algorithm and sensitivity of the model to identified parameters is presented. Copyright (C) 1996 Elsevier Science Ltd.

    Journal Title

    Engineering Structures

    Volume

    19

    Issue/Number

    3

    Publication Date

    1-1-1997

    Document Type

    Article

    Language

    English

    First Page

    224

    Last Page

    232

    WOS Identifier

    WOS:A1997WL05900004

    ISSN

    0141-0296

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