Setting general values of area and
moment of inertia in
SAP2000
Define Frame Sections - To define the cross-section properties of a structural element, click on
the Define menu located at the top of the
SAP2000 interface window, then click on Section
Properties, then Frame Sections..., and
then the Frame Properties window is
displayed.
The default Frame Section
label is FSEC1. To change the properties
of the frame section, click on the Modify/Show
Property... button. The I/Wide Flange
Section window is displayed.
To define the material of
this frame section, click on the Material pull-down
menu and select our weightless material A992Fy50.
Click OK to return to the Frame
Properties window, then click OK again.
In this example, the frame elements have a
cross-sectional area of A = 10 in2 and a
moment of inertia value I = 600 in4. Click
Add New Property on the Frame Properties menu to
specify this value. The Add New Property menu is
displayed. For this example, click the Frame
Section Property Type dropdown menu, select
Other, and then click on General.
Click Add New Property on the Frame Properties
menu to specify this value. The Add New
Property menu is displayed. For this example,
click the Frame Section Property Type
dropdown menu, select Other, and then
click on General.
Click
Add New Property on the Frame Properties menu to
specify this value. The Add New Property menu is
displayed. For this example, click the Frame
Section Property Type dropdown menu, select
Other, and then click on General.
The Property Data menu is
displayed. In this example, the Moment
of inertia about the 3 axis (the strong
axis) is 600 in4. The value of the
Cross-sectional area is 20 in2.
The Moment of inertia about the 2
should be a small value of 0.001 to minimize their
effect on the results. Set all the other values
in the left column to zero.
Enter the value and click
OK. Then click OK on the
General Shapes menu, and the Frames
Properties menu is displayed. Note that FSEC2
has been added to the list of sections. Click
OK.
