American Steel Design
Section 2
2-66
If the TRACK is set to 1.0, member design strengths will be
printed out.
2.14.13 Composite Beam Design per the American
LRFD 3rd edition code
The design of composite beams per the 3
rd
edition of the American
LRFD code has been implemented. The salient points of this
feature are as follows:
Reinforced-concrete slab
Rib Height
b = effective width
t = thickness of slab
A = Area of Steel Beam
f = Ult. Compressive Strength of Concrete
S
C
Figure 2.6
Theoretical basis:
1.
Find the maximum compressive force carried by concrete as:
0.85 f
c
. b . t
2.
Find the maximum tensile force carried by the steel beam as:
A
s
. f
y
Tensile strength of concrete is ignored.