SAP2000 SAP2000 Web Tutorial 1

11. In this dialog box:
• In the Horizontal Range area type 2 in the Max edit box.
• In the Axis Labels area type Control Joint Displacement in the Horizontal edit box.
• In the Axis Labels area type Resultant Base Shear in the Vertical edit box.
• Click the OK button to change the axis labels and range.
12. Now we will reset the default axis labels and range. Click the Override Axis Labels/Range
button. The Override Axis Labels and Range dialog box appears.
13. In this dialog box:
• Click the Reset Defaults button.
• Click the OK button.
14. Select PUSH3 from the Static Pushover Case drop-down box. The plot changes to that for
PUSH3. Recall that PUSH3 is the uniform acceleration in the X-direction.
Note: If at any time you want to check and see the definition of a pushover load case click
the Done button to close the Pushover Curve dialog box. Then, from the Define menu
select Static Pushover Cases..., and when the Define Static Pushover Cases dialog box
appears, select the pushover case you are interested in, and click the Modify/Show
Pushover button.
15. Review the base shear versus control displacement curves for the other pushover load cases.
16 Select PUSH2 from the Static Pushover Case drop-down box.
17. Select the Capacity Spectrum option in the Plot Type area. As shown in Figure D-8, the plot
changes and the Demand Spectrum area and the Damping Parameters area are now active.
Note: When the capacity spectrum option is chosen, the pushover curve is displayed in
ADRS (Acceleration-Displacement Response Spectrum) format. Refer to ATC-40 for a
discussion of this format which is essentially a plot of spectral acceleration versus
spectral displacement. In SAP2000, the force-displacement pushover curve is converted
to the ADRS format by converting the resultant base shear to a spectral acceleration , Sa,
and the control displacement in the control direction to a spectral displacement, Sd,
generally based on equations 8-1 thru 8-4 in ATC-40.
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