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• In the Force-Displacement spreadsheet and diagram area:<br />
ä Note that the symmetric check box is checked and that the hinge property forcedisplacement<br />
diagram is symmetric. In the diagram, the axes are shown in red. The<br />
horizontal axis is displacement and the vertical axis is force.<br />
Note: When the symmetric check box is<br />
checked, the upper portion (points<br />
B-, C-, D- and E-) of the input<br />
spreadsheet for the hinge forcedisplacement<br />
properties is gray.<br />
You can not edit these values; they<br />
are automatically picked up from<br />
symmetry with points B, C, D and E.<br />
ä Change the Force/Yield value for point<br />
C from 1.25 to 1.5 by typing 1.5 into the<br />
appropriate spreadsheet cell and then<br />
clicking in any other spreadsheet cell.<br />
Force<br />
A<br />
B<br />
D<br />
C<br />
Displacement<br />
E<br />
ä Note the change in shape of the force-displacement diagram. The diagram is scaled<br />
to fit within the plot area.<br />
ä Note that the Force/Yield value for point C- has changed also from -1.25 to -1.5.<br />
ä Uncheck the symmetric check box by clicking it. Note that points B- through E- are<br />
no longer gray. Also note that in the Acceptance Criteria area, the Negative column<br />
is no longer gray.<br />
ä Change the Force/Yield value for point C- from -1.5 to -2 and click in another<br />
spreadsheet cell. Again note the change in shape of the force-displacement diagram.<br />
• In the Scaling area note that the Calculate Yield Force and Calculate Yield Displacement<br />
check boxes are checked by default. This means that the program will automatically<br />
calculate these values. We could, for example, overwrite the yield force by unchecking<br />
the Calculate Yield Force check box and typing in an appropriate value in the Yield<br />
Moment edit box. For this tutorial we will accept the default and have the program<br />
calculate the yield values.<br />
• In the Acceptance Criteria area we will also accept the default values. Note that since the<br />
Symmetric box is not checked both Positive and Negative values are input. If the<br />
Symmetric box was checked, only Positive values would be input (the Negative column<br />
would be gray and inactive).<br />
Note: The acceptance criteria are input as the ratio of displacement over yield<br />
displacement, similar to the force-displacement spreadsheet.<br />
<strong>SAP2000</strong> <strong>Web</strong> <strong>Tutorial</strong> 1 88