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To model nonlinear frame behavior, frame hinges must be used. The nonlinear material behavior is only used to develop the moment rotation or other response curves for the hinges.

...

Users must assign concentrated hinges to frame elements which may experience nonlinear behavior. Definition of nonlinear material behavior does not enable plastic behavior, though it is necessary for the generation of the interaction surface and moment-rotation curves which characterize the yield criteria of a nonlinear frame element.

Key steps to modeling hinges

  • Define hinge properties using

    "

    the Define > Section Properties > Hinge Properties

    "

    menu

    command

    .

  • Assign

    the

    hinges to

    the

    nonlinear frame elements

    in

    using the

    model by using

    Assign > Frame > Hinges menu

    command

    .

  • Create a nonlinear load case and run the analysis.

  • Use

    "

    the Display > Show Hinge Results

    "

    menu

    command

    to plot

    the deformation of the hinges vs. the applied loads, such as plastic rotation of the hinge vs. moment

    hinge deformation against applied loading. Moment vs. plastic rotation is one such option.

See Also

  • Verification Example 1-026

    (Frame - Moment and Shear Hinges)

    , available

    from "

    through Help > Documentation > Analysis Verification > Frames > 1-026 Moment and Shear Hinges

    ".

  • Ashraf

    Habibullah,

    Stephen Pyle:

    A., Pyle, S. (1998). Practical Three Dimensional Nonlinear Static Pushover Analysis

    - this technical paper describes the use of hinges for pushover analysis; it is available from http://csiberkeley.com/support_technical_papers.html

    , Computers and Structures, Inc., Berkeley, CA

Metadata

  • Name: Hinge first steps (SAP2000)

  • Description: Basic introduction to hinge application in SAP2000.

  • Program: SAP2000

  • Program Version: na

  • Model ID: na