Download SAFE Tutorial for slab design PDF

TitleSAFE Tutorial for slab design
File Size734.4 KB
Total Pages38
Table of Contents
                            Cover Page
An Example Model
The Project
	Step 1 Begin a New Model
		Set the Units
		Define the Grid
		Save the Model
	Step 2 Define Properties
		Define Slab, Drop and Column Properties
		Define Beam Properties
	Step 3 Define Supports
		Define Column Supports
		Define Wall Supports
	Step 4 Define Static Load Cases
	Step 5 Draw Objects
		Draw Slabs (Area Objects)
		Draw Column Supports (Point Objects)
		Draw All Support (Line Objects)
		Draw Drop Panels (Area Objects)
		Draw Columns (Area Objects)
		Draw Beams (Line Objects)
		Draw Openins (Area Objects)
	Step 6 Set Object Options
	Step 7 Assign Loads
	Step 8 Run the Analysis
	Step 9 Graphically Review the Analysis Results
	Step 10 Design
Document Text Contents
Page 19

Tutorial for SAFE Version 8.0.0

havior such as shrinkage and creep. For this tutorial, a cracked de-
flection analysis will not be performed, and therefore the long-term
deflection multiplier is not applicable.

F. Click the Modify Load button to accept the changes.

G. Now we will define the live load case. Click in the Load edit box and
type LL.

H. Select LIVE from the Type drop-down list.

I. Type 0 (zero) in the Self Weight Multiplier edit box.

J. Type 1 in the Long Term Deflection Multiplier edit box.

K. Click the Add New Load button to add the LL load to the load list.
The Static Load Case Names form should appear as shown in Figure

Figure 11
Static Load Case Names form with load cases defined

L. Click the OK button to accept all of the defined static load cases.
Click the File menu > Save command, or the Save button , to
save your model.

14 Step 4 Define Static Load Cases

Page 20

Tutorial - An Example Model

Step 5 Draw Objects
In this Step, area, point and line objects will be drawn to represent slabs,
drops, columns, column supports and wall supports.


A display
window is
active when
the Display
Title Bar,
just below
the menu
bar, is high-

Draw Slabs (Area Objects)
With two windows tiled vertically (Options menu > Windows com-
mand), ensure that the left window is active and set to a Structural Layer
Plan View (click anywhere in the left window and use the View menu >
Set Structural Layer command to set this view). Also check that the
snap to points/intersections feature is enabled (click the Draw menu >
Snap to > Points command or use the Snap to Grid Intersections and
Points button ); the feature is enabled when the associated button ap-
pears depressed. This will assist in accurately positioning the area ob-
jects. Now draw area objects to model the slab using the following Ac-
tion Items.

A. Click the Draw menu > Draw Area Objects command, or the
Draw Area Objects button to access the Properties of Object
pop-up form for areas shown in Figure 12.

Make sure that the Type of Area is set to Slab. If it is not, click once
in the edit box opposite the Type of Area item and select Slab from
the drop-down list.

Figure 12
Properties of
Object form for
area objects


If the Proper-
ties of Object
form covers
part of the
model, click
on the blue
title bar, hold
down the
mouse button,
and drag it out
of the way.

B. Click in the Property edit box and select SLAB1 from the drop-down
list. This is the slab property defined in Step 2.

C. To draw the first corner of the area object, click once in the Struc-
tural Layer Plan View at the intersection of grid lines A and 9. Then
moving clockwise around the grid, click once at these grid intersec-

Step 5 Draw Objects 15

Page 37

Tutorial for SAFE Version 8.0.0

Figure 30
X-Strip reinforcing

Figure 31
Slab Rein-

32 Step 10 Design

Page 38

Tutorial - An Example Model

The Plan View will be updated to show the required reinforcing
in the Y-Strip direction. Again, positioning the cursor anywhere
on the Plan View will result in the display of the reinforcing val-
ues in the lower left-hand corner of the SAFE window.

D. To view the required reinforcing in the beams, click the Design
menu > Display Beam Design Info command. The Beam Reinforc-
ing form shown in Figure 32 appears.

Figure 32
Beam Reinforcing

1. Select the Flexural Reinforcing option in the “Type of Reinforc-
ing” area.

2. Review the other selected options and then click OK to accept
the selections.

The Plan View will be updated to show the flexural reinforcing
required in the beams along the two perimeter sides. Positioning
the cursor on the beams will result in the display of the reinforc-
ing values in the lower left-hand corner of the SAFE window.

Click the File menu > Save command, or the Save button, to save
your model.

Congratulations! You’ve successfully created a SAFE model.

Step 10 Design 33

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