Civil Engineering Reference
In-Depth Information
SOLUTION
T
C
c
ab
A
s
f
y
0.85
f
A
s
f
y
0.85
f
(1530)(420)
(0.85)(28)(300)
90 mm
a
c
b
d
a
2
d
a
2
d
a
2
M
n
T
C
A
s
f
y
430
90
2
(1530)(420)
2.474
10
8
N
mm
247.4 kN
m
2.6
SABLE32
In this section the reader is introduced to a computer program, SABLE32, which was
originally prepared for the solution of structural analysis problems but which has now
been expanded to include the design of reinforced concrete members. The program was
written for use with IBM and IBM-compatible personal computers. A copy of the pro-
gram is included on the CD-ROM provided with this topic.
SABLE32 was developed as a tool for students and not for the practicing engineer.
Nevertheless, in many situations it may be useful in actual practice. It is a Windows
-
based program designed to operate with the Windows 98
, Windows NT 4.0
, or Win-
dows 2000
operating systems. The minimum system requirements include a VGA
monitor, a keyboard, a mouse, 5 Mbytes of disk space, and a printer.
To start SABLE32, the user clicks on the Start Menu. A description of the program,
including the assumptions and limitations of the procedures used, can be obtained by
clicking the HELP button. The different reinforced concrete problems that can be solved
with the program are shown on the menu bar once the software is started. The notation
used is as consistent as possible with the ACI 2002 Code. Almost all of the checks re-
quired by that code for complete designs are included.
The moment capacity of a singly reinforced concrete beam is determined with
SABLE32 in Example 2.8. First we click on the icon for beams,
. The screen will list
several types of beams—tensilely reinforced and doubly reinforced rectangular beams
and T beams. We click on the tensilely reinforced case and then successively on the but-
tons DESIGN DETAILS, DESIGN FORCES AND MATERIALS, providing in each case
the information requested. After this is completed we click on the APPLY and OK but-
tons. Finally, we look at the menu bar at the top of the screen and click on VIEW and DE-
SIGN, after which the solution may be printed by clicking on FILE, PRINT, and OK.
Only part of the detailed printout is included here. You should note that
M
n
has been mul-
tiplied by a strength reduction factor
0.9, a topic that is discussed in the beginning of
Chapter 3.
