Nonlinear analysis of mixed steel-concrete frames. I: Element formulation

    Authors

    S. El-Tawil;G. G. Deierlein

    Comments

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    Abbreviated Journal Title

    J. Struct. Eng.-ASCE

    Keywords

    FILLED TUBES; MODEL; PLASTICITY; Construction & Building Technology; Engineering, Civil

    Abstract

    A beam-column element for simulating the inelastic behavior of 3D mixed frame structures comprised of steel, reinforced concrete, and/or composite members is presented. The formulation makes use of the flexibility method for deriving the element stiffness equations. A stress-resultant bounding surface plasticity model provides the sectional properties, which are then integrated along the length to generate the stiffness matrices. For steel members, the plasticity model is based on two nested surfaces, whereas for composite and reinforced concrete members the inner loading surface is degenerated to a point. Stiffness degradation of reinforced concrete and composite members is incorporated as a function of dissipated strain energy. Implementation and verification of the models for static and dynamic time-history analyses of mixed steel-concrete space frames are presented in a companion paper.

    Journal Title

    Journal of Structural Engineering-Asce

    Volume

    127

    Issue/Number

    6

    Publication Date

    1-1-2001

    Document Type

    Article

    Language

    English

    First Page

    647

    Last Page

    655

    WOS Identifier

    WOS:000168903700008

    ISSN

    0733-9445

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