{{Tutorial

The procedure to run pushover analysis in SAP2000 V12 is outlined by the steps listed below.

Create Computer Model

...

On this page:

An overview of the procedure for pushover analysis is given as follows:

Create the computational model

• Create the computational model, without pushover data, using conventional modeling techniques.

• Define properties for pushover hinges using Define > Section Properties > Hinge Properties

  menu command. The program includes several default build-in hinge properties and the user-defined properties are also

  . Hinges may be defined manually or by using one of several default specifications which are available.

• Assign the pushover hinges to

  the frame elements in the model by

  selected frame objects using Assign > Frame > Hinges

  menu command

  .

• Define Load pattern (

  Select Define > Load Patterns

  ) that

  to define load patterns which will contain the loads

  to be

  applied

  in the

  during pushover analysis.

Define

...

a nonlinear static load case

...

• Select Define > Load Cases > Add New Load Case

  menu command. Load pattern specified in the previous step would be entered as the applied load. The load case can be force controlled, that is, pushed to a certain defined force level, or they can be displacement controlled, this is, pushed to a specific displacement.Set

  to define a nonlinear static Load case which will apply the previously-defined load pattern. This load case may be force-controlled (pushed to a specified force level) or displacement-controlled (pushed to a specified displacement).

• Select Other Parameters > Results Saved to Multiple States

  , this will enable you to plot

  such that various parameters may be plotted for each increment of

  the

  applied

  load

  loading.

Run

...

the analysis

• Select Analyze > Run Analysis

  menu command

  to run the static-pushover analysis.

Review

...

results

• To plot base shear vs. monitored displacement

  as well as other plots.
• Display > Show Hinge Results enables you to plot the deformation of the hinges vs. the applied loads, such as plastic rotation of the hinge vs. moment.
• Use Display > Show Deformed Shape menu command to review displaced shape and a sequence of hinge formation on a step-by-step basis.
• Review

  , select Display > Show Static Pushover Curve. Additional variables are also available for plotting.

• To plot hinge deformation vs. applied loading, select Display > Show Hinge Results. Moment as a function of plastic rotation is one such option.

• To review displacement and the step-by-step sequence of hinge formation, select Display > Show Deformed Shape.

• To review member forces on a step-by-step basis

  using

  , select Display > Show Forces/Stresses > Frames/Cables

  menu command

  .

• Use

  Select Display > Show Plot Functions to plot

  various outputs (such as joint displacements, frame member forces)

  response at each step of the pushover analysis, including joint displacement, frame member forces, etc.

See Also

• CSI Analysis Reference Manual

  , chapter "

  (Nonlinear Static Analysis

  ", section "

  > Static Pushover Analysis

  "

  , page 394)

• Ashraf Habibullah and Stephen Pyle:

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

  Structure Magazine, Winter 1998 ( available for download from http://www.csiberkeley.com/support_technical_papers.html )
• Static Pushover Analysis Watch & Learn video available from http://www.csiberkeley.com/Support_WL_SAP.html

...

• Computers and Structures, Inc., Berkeley, CA

• CSI Watch & Learn video series, SAP2000 Tutorial 21, Static Pushover Analysis

Metadata

• Name: Pushover analysis first steps

• Description:

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