MASE 321 Lab. RISA 3D Introduction. Global Parameters. Click the button to start drawing members.

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1 MASE 321 Lab RISA 3D Introduction You can get this information in users manual. (click help ) Once you open the application, you will see the following. Click the button to start drawing members. Global Parameters Global Parameters are settings that apply to the model as a whole. This window is opened automatically. Use your mouse to select the Description tab and click in the first field, labeled Model Title so that a

2 flashing cursor appears there. Now type: Tutorial Problem, [TAB] (Type your company name) [TAB] (Type your name) Any notes that you would like to keep with the model may be typed in the Notes area. Use your mouse to select the Solution tab. The Number of Sections field is where we specify how many locations along each member are to be used for the reporting of forces, stresses, and deflections. The Number of Internal Sections controls how many places along each member the software calculates and stores results such as deflections and code checks. The member force diagrams displayed in the model view and the detail plot are also drawn from these results. The checked Include Shear Deformation box indicates shear deformation considerations are to be included in the model solution. This will almost always be checked (the default). The Include Warping field indicates whether you want RISA 3D to consider torsional warping effects when calculating stiffness and stress values for wide flange and channel shapes. The Area Load Mesh size controls how many discrete areas the load is broken into before it is attributed to the members.

3 The Merge Tolerance is used as the maximum distance 2 joints can be apart and still be merged together. It is also used when scanning for crossing members and for unattached joints along the spans of members. Moving down, the P Delta Tolerance is used to set the convergence tolerance for the P Delta analysis. Leave this set to 0.5%. Code tab These items control how code checking is performed. Currently the Hot Rolled Steel Code choices include 9th edition ASD, 2nd Edition LRFD, 3rd Edition LRFD, and several international steel codes. The Cold Formed Steel Code choices are AISI 99: ASD & LRFD, AISI 01: ASD & LRFD, and several international codes. The choices for Wood Design Code and Concrete Design Code are also the standard US codes along with several international codes. Draw members, give boundary conditions and loads. Make the grid to the dimensions that you need using. You will get the window as shown below. What it shows in the window is define a drawing grid with an initial X increment for our truss points of 3 ft followed by 4 equal increments of 3.75 ft each and a final increment of 3 ft. Note the use of symbol to define a series of equalincrements.

4 Now draw a member by clicking. Then, give a boundary conditions using the button and the load either or. We need to give load combinations by clicking the load combination tab in the data entry. Solve Solve the problem : or click on the solve menu.

5 Results Click on the set plot option button to plot what we need. We can show the deflected shape in the deflection diagrams tab. We can also do the animation of deflection. Under the joint tab, we can find the reactions. Under the moment tab, we can draw a bending moment diagram.

6 If we need detailed information, click on the Results menu > members > member detail. Type in member number and click OK. You will get the report on member similar to the figure shown in the previous page. Click on the deflection diagram, then hit the << button twice to get the deflection diagram for the member. Using RISA 3D, we can get the suggested shapes of the member. Once you get the suggested shape, we can replace the member and resolve. To get more detailed information, please check the User s manual.