Pharos University 2012-2013, fall term Faculty of Engineering ...

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25 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

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50

4 16

450
0

200

Pharos

University







20
1
2
-
20
1
3
, fall term

Faculty of Engineering







Reinforced Concrete

Design
-
2

Construction Engineering and management Dept
.



Due date:

0
2
-
10
-
201
2

Exercise (
1
)
:
Revision

Materials to be used:

Concrete
:
f
cu
=25 N/mm
2

,

Steel
:
St.360/520 (for longitudinal reinforcement) & St.240/350 (for stirrups)


Question (1)

a)

Calculate the area of the balanced tensile reinforcement

(
A
sb
) for a rectangular concrete section
(
b
=200mm,
d
=540mm) and the
corresponding ultimate moment

(
M
b
).

b)

Using
design charts provided in E
CP
203 design Aids
,
calculate the reinforcement

required for a
reinforced concrete T
-
section to resist an ultimate bending moment (
M
u
=100kN.m) given that:

section depth (
d
=630mm), web width (
b
=250mm)

slab thickness (
t
=100mm),
effective flange width (
B
=1200mm)


Question (2)

a)

For the shown reinforced concrete rectangular section,
calculate
the
service

moment capacity
.

b)

Calculate the reinforcement

required for the given rectangular
concrete section if the section is subjected to a service bending
moment (M=80kN.m) using the working stress design method.



Question (3)

a)

Design a circular reinforced concrete short column

to resist an ultimate load (
P
u
=3000

kN).


Question (4)


20%

a)

Define the
development length

of reinforcing bars.

b)

The given figure shows the main
dimensions of a simply supported
reinforced concrete beam and the shearing
force diagram resulting from the ultimate
loads acting on that beam. Assuming that
the shear stresses are res
isted by vertical
stirrups only,
calculate the required web
reinforcement

over the full length of the
beam, given that (
b
=200

mm) and
(
d
=500

mm).


0.30
0.30
S.F.D.
150kN
150kN
100kN
100kN
50kN
50kN
2.00 m
2.00 m
2.00 m