Divide Frames
Trapezoidal Loads (Distributed Loads)
Click the File menu > New Model command to access the New Model form.
Click the drop-down list to set the units to 
.
Click on the Beam button 
to access the Beam form. In that form:
Type 1 in the Number of Spans edit box.
Type 30 in the Span Length edit box.
Click the + (plus) symbol beside the Beams drop-down list to access the Frame Properties form.
Click the Import New Property button to access the Import Frame Section Property form.
Select Steel in the Frame Section Property Type drop-down list.
Click the I/Wide Flange button to access the Section Property File form.
Select the SECTIONS.PRO file and click the Open button to access a database form that lists the available sections.
Click the + (plus) symbol beside the Material drop-down list to access the Define Materials form.
Highlight the A992Fy50 definition in the Material display list and click the Modify/Show Material button to access the Material Property Data form.
Verify 29000 is entered in the Modulus of Elasticity edit box.
Verify 0.3 is entered in the Poisson’s Ratio edit box.
Accept the other default values.
Click the OK buttons on the Material Property Data and Define Materials forms to return to the database form.
Ensure that the A992Fy50 definition is selected in the Material drop-down list.
Scroll down the list of sections and highlight the W21X50 section to select it.
Click the OK button to close the database form to access the I/Wide Flange Section form.
Click the OK buttons on the I/Wide Flange Section and Frame Properties forms to return to the Beams form.
Note that the W21X50 section is displayed in the Beams drop-down list.
Click the OK button to close the Beams form and display the template model in the program windows.
Click the drop-down list in the status bar to change the units to .
Click the “X” in the top right-hand corner of the 3-D View window to close it.
Click the Define menu > Load Patterns command to access the Define Load Patterns form. In that form:
Type 0 in the Self Weight Multiplier edit box.
Click the Modify Load Pattern button.
Click the OK button.
Select the line (beam) object.
Click the Assign menu > Frame Loads > Point command to access the Frame Point Loads form. In that form:
In the Load Type and Direction area, verify that the Forces option is selected and that the Gravity direction is selected.
In the Point Loads area, select the Absolute Distance From End I option.
In the Point Loads area, type .25 in the first Distance edit box and type 30 in the first Load edit box
Click the OK button.
Select the line (beam) object.
Click the Assign menu > Frame Loads > Distributed command to access the Frame Distributed Loads form. In that form:
In the Load Type and Direction area, verify that the Forces option is selected and that the Gravity direction is selected.
In the Trapezoidal Loads area, select the Absolute Distance From End I option.
In the Trapezoidal Loads area, type 2 in the first Distance edit box and type 2 in the first Load edit box.
Type 8 in the second Distance edit box and type 1 in the second Load edit box.
Click the OK button.
Select the line (beam) object.
Click the Assign menu > Frame Loads > Distributed command to access the Frame Distributed Loads form. In that form:
In the Trapezoidal Loads area, type 10 in the first Distance edit box and type 0 in the first Load edit box.
Type 12 in the second Distance edit box and type 1 in the second Load edit box.
Type 18 in the third Distance edit box and type 2 in the third Load edit box.
Type 20 in the fourth Distance edit box and type 0 in the fourth Load edit box.
Select the Add to Existing Loads option.
Click the OK button.
Select the line (beam) object.
Click the Edit menu > Edit Lines > Divide Frames command to access the Divide Selected Frames form. Verify that the form appears as shown in the figure and click the OK button. The frame object is broken into two objects with a joint at the center. Note that the frame loading did not change
Click the Show Undeformed Shape button 
to remove the displayed frame static load assignments.
Click the Analyze menu > Set Analysis Options command to access the Analysis Options form. In that form:
Click the Plane Frame XZ Plane button 
to set the available degrees of freedom.
Click the OK button.
Click the Run Analysis button 
to access the Set Load Cases to Run form. In that form:
Click on MODAL in the Load Case Name list to highlight it.
Click the Run/Do Not Run Case button.
Click the Run Now button.
When the analysis is complete, check the messages in the SAP Analysis Monitor window (there should be no warnings or errors) and then click the OK button to close the window.
Right click on the center joint to see its displacement in feet.
Click the drop-down list in the status bar to change the units to 
.
Right click on the center joint to see its displacement in inches.