Civil Engineering Reference
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155 mm
37 mm
2 φ 12
240 mm
166 mm
3 φ 12
37 mm
120 × 1.2 mm
P/2
P/2
1100 mm
600 mm
1100 mm
638 mm
638 mm
2800 mm
Beam F7
FIGURE 5.21
Example 5.13 showing the beam section and profile.
Example 5.13: Analysis
Fanning and Kelly (2001) tested a series of beams that failed by cover delamination
(F5-F10). Beam F7 (Figure 5.21) had the following parameters:
*
=
=
f
2400 MPa
fu
E
155 GPa
f
A
=
120 mm x1.2 mm
f
f
=
532 MPa
y
E
=
204 GPa
s
E
39.2GPa (measured)
=
=
c
f
80 MPa
c
L
L
638
1100
af
0.58
=
=
a
Ignore
ε
bi
Solution:
f
==
f
0.62 80
=
5.55 MPa
ctmr
f
=
5.0MPa (measured)
ct
7.5
6.7
f
=
f
=
5.6MPa
O.K.
r
ct
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