User manual RISA TECHNOLOGIES RISAFOUNDATION

[. . . ] RISAFoundation Rapid Interactive Structural Analysis ­ Foundation Analysis and Design User's Guide 26632 Towne Centre Drive, Suite 210 Foothill Ranch, CA 92610 (949) 951-5815 (949) 951-5848 (FAX) www. risatech. com Copyright ©2010, RISA TECHNOLOGIES, LLC. No part of this publication may be reproduced or transmitted in any form or by any means, electronic, or mechanical, including photocopying, recording, or otherwise, without the prior written permission of RISA TECHNOLOGIES, LLC. RISA, as applied to structural engineering software, is a trademark of RISA TECHNOLOGIES, LLC. All other trademarks mentioned in this publication are the property of their respective owners. [. . . ] Click Apply. To ensure accurate grid selections, turn on the snap points and zoom in on your model view: On the Drawing toolbar, click Universal Snap Points pressed in . When selected, the button will appear On the Window toolbar, click Zoom In a few times (or roll the mouse wheel forward). Note: Once you zoom in, you may need to move your model around on the screen to reposition the model. Use the panning technique described earlier (press the mouse wheel down, hold, then drag the model view in any direction). 54 Part A: Tutorial 3 - Loading Now, make your grid selections by defining their coordinate locations, as shown below. Right click (or press ESC) two times to release the mouse and exit the drawing mode. Now that you have made your grid selections, zoom back out to full model view. On the Window toolbar, click Redraw . When you are finished, your model should like this: Point Loads Point load direction is the same as for line loads; a positive force signifies a downward force. You can use these to model loads to the pedestals, or apply them anywhere on the slab. You can do this easily by unselecting the entire model, then retrieving your Slab Pedestals selection state from the previous tutorial: On the Selection toolbar, click Unselect All . Make sure that Slab Pedestals is Also on the Selection toolbar, click Save/Recall Selection selected, and click Retrieve. On the Drawing toolbar, click Draw Point Loads . In the Load Category Code list, click DL-Dead Load. Under What happens when Apply is pressed?, click Apply Load to All Selected Points. 55 Part A: Tutorial 3 - Loading Verify the dialog box settings, then apply: Click Apply. Notice the loads have been added, and your model should now look like this: Next, apply the live loads: On the Drawing toolbar, click Draw Point Loads box). (or press CTRL+D to recall the last dialog In the Load Category Code list, select LL-Live Load. Under What happens when Apply is pressed?, click Apply Load to All Selected Points. 56 Part A: Tutorial 3 - Loading Verify the dialog box settings, then apply: Click Apply. Note: As soon as you apply this load, notice the Window toolbar loads display button switches to display only the LL-Live Load category loads (this will be explained in more detail later in this tutorial). Lastly, apply loading to your footings. On the Selection toolbar, click Unselect All to unselect the entire model. Click the Supports/Beams tab. Also on the Selection toolbar, click Criteria Selection In the Point Selection Criteria area, select the Use?Under Point Properties, in the Footing list, click Footing 1. 57 Part A: Tutorial 3 - Loading Verify the dialog box settings, then apply: Click OK. Continue adding loads, but this time use the Insert menu to access the Point Loads dialog box: On the Insert menu, click Loads, then click Point Load. Under What happens when Apply is pressed?, click Apply Load to All Selected Points. Click Apply. 58 Part A: Tutorial 3 - Loading Verify that the load was properly applied on your footings. (If you need to move the Draw Point Loads dialog box, click the title bar and hold, then drag the dialog box to the new location. ) Finish adding your loads: In the Load Category Code list, click LL-Live Load. [. . . ] Under Show Slabs As, click Rendered. Modify the deflection settings: Click the Deflection tab. Under Show Deflected Shape For, click Load Combination (pick from list at bottom). In the Combination To Use For Results Display box, select 16: ACI 9-5 (a). 145 Part B: Tutorial 5 ­ Solving & Results Execute the changes and close the dialog box: Click OK. View the model in isometric view: On the Window toolbar, click Isometric On the Window toolbar, click Redraw Also turn off the view of the loads: Click on the Toggle Loads button. [. . . ]