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

• CSI Analysis Reference Manual

  , chapter "

  (Frame Hinge Properties

  "

  , page 131)

• 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