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Users must assign discrete hinges to frame elements in order to model nonlinear behavior in frame element. Merely defining a nonlinear material properties does not activate nonlinear material response of frame elements, unless hinges are assigned to the frame elements. Nonlinear material stress-strain curve is used to determine the response of the hinges.

Key steps to modeling hinges

• Define hinge properties using the "Advanced Tab > Define > Section Properties > Hinge Properties" menu command.

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• Use the "Home Tab > Display > More > Show Hinge Results" menu to plot hinge deformation against applied loading. Moment vs. plastic rotation is one such option.

See Also

• CSI Analysis Reference Manual (Frame Hinge Properties, page 131)

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