JKEARNEY
NOTES
SIN 325
,Chapter
-
1 :
-
Properties Load
of Reinforced Concrete .
(
pg
7)
{Compression
A
lreinfoqe.me#I- 1¥ N#%
µ µ #
Tension .
Section strain
Et
whenwehavecracks.i s
:÷÷÷÷÷t÷i¥.¥÷÷÷:÷÷÷¥¥ :
the steel .
whenwehavemas.si#ecrack:fsYotcoenhe8wpfaFfE?
FIFI F Easy:#age
*
concrete starts
to crush .
Concrete :
( 8)
T pg
!
f ↳o£
EE
SA cube
use
strength ( 28 water
150mm cubes)
day
cured
strength
-
USA use
cylinders ( 150mm diameter ,
300mm
high)
Euro code use both Cuckoo has a
of
cylindercube
strength 40M Pa
of
or a
strength 50 MPa .
, -ypicagth (
Pg 'd
fcy Cylinder
-
(
{tubeegth
#
Houses
20125 .
→
for .
-
( 25/30 structures .
Strength
( 30/37
tus is:/:÷÷:÷÷:÷÷:¥÷÷
Cassius >
Class
cylinder kubeato.se)
cube
i.e
{ff}
Coolio →
E- value 220+0.2 fcu strength
( 60/75 .
( 70/85
C.
80/95
60/105 fcu
fcu Cube
strength
-
Fck
cylinder strength ( OR
fcy)
-
, cylinder
cube
tension /
strength using
* Note : Use cube when
compression steel
.
Use
cylinder strength
when
working
with shear .
,Steel (
pg " )
mild steel ( 250hPa ) R
SA use
fy
-
-
( Y
high yield
steel
fy 450hPa )
-
Euro code 2
fy 500hPa
-
use
O
Ki
Estee ,
=
200 G- Pa
fy - -
;
l
E
Ey
Bardia : ( Q)
8MM
steel
10mm High yield
12mm
f
16mm
20mm 10412 @ 200
+200mm
spacing
25mm
32 MM
I tzmm diameter .
40mm 10 bars
We in the tables ( last page)
get areas
* can
,Compositettction
concrete steel
strength in tension Poor Good
compressive strength Good will
buckle
fair Good
shear
strength
corrodes
Durability Good
Fire resistance . Good Poor .
Use concrete in compression & steel
in tension & shear Cover steel
concrete
.
in to it
protect .
,Chapter :
Li¥g cpgzos
Limit state is condition at which a
a
structure becomes unfit for its intended
USC .
Ultimate Limit State ( ULS) :
collapse .
Servis Limit state :(SLS)
ability
deflection ,
cracking durability
,
.
Limits use
ps t factors .
Von material
safety factor
-
.
safety factor
tf load
-
.
D.es#adeffect- Design resistance .
If Q n f
tfkm
where Qin -
nominal load
fr characteristic material
strength
-
.
Materfeto ( pg 3 formula
book )
ULS concrete : 1.5 steel : 1.15
SLS concrete : i. O steel : i. O
, Design strength fume
-
-
( Table 4)
Pat#fetyfactofoato( tf )
ULS 1.2dL ti - 6hL ( DL =
Gu &
LL Qu )
-
-
OR 0.9dL → for load reversal .
SLS : t.IDLtl.CL
value of action
Design Vfx characteristic
- -
tie action .
( permanent & Variable Action)
Dead Load & Live Load .
Loads
own
weight a
Imposed
I I
sometimes
Always .
1. ZDLTI . 6hL .
I ZDLTI .
6hL
IT IT TET
I # IT
Max
hogging .
•
⇐ XX •
•
Bending
Max
Bending
Max
,Note : we have
hargetxampke.x.DE 25k NIM
,
LL
-
-
IOKNIM
a
D E
few load cases
\
Afpc
that will produce f f f f f f f Hogging
on:iI¥imwEm moment
for FA FB
design .
Fc
CASI:
207 KNM Bumpy
o• ↳
loading
Full
#
.
•
116,4kNM
WULF 1.2×25+1.6×10
46 KNIM =
{ Fy : Fat FBTFE 46W -
⑦
{ MEO : 12 FA t
6 FB
=
12 Wx 6
FB =
12W
-
2 FA -
②
°
Hfc) =
FA -
wat FB Gc -
a>
MGC)
-
-
SVGc) doc =
FA -
x -
wyd
t FBGC -
6> + A
MCO)
-
-
O ÷ A
§,=M£ :EIf#=FAxzI w.gs#tFBGc-z65tB
-
o
, 3
ZI
"
FBxG
EIV =
FAX t + But C
wz 2g
-
EI (o) v
-
-
O o : c
-
-
o
EI VC6)
RAx6£ ¥634 G B O
= - =
% B =
9W -
GRA -30
EI VCR)
FARE -wz{y FB
# B
=
t t 12
x
E .
O =
24 FA -
72W t 3. FB t B -
④
③ in ④
0=24 FA 72W t 3 FB t 9W GFA
-
-
=
12 FA -
27W
I. RA =
103,5 kN
In ③ B =
9146 ) -
6/103 5) ,
=
207
M ( 6) 103,5 (6) 207 KNM
4621672
= - = -
Find zero moment : M (x ) =
0=103 5K -
46×2
,
2-
#
f. 3C
4,5M
=
Findmaxlminmomentoo UGO -
0=103,5 -
46k
2,25M where the maximum
sagging
o : so -
moment is .
M ( 2,25) =
103,512,25 ) t 4612,255L =
116,4k NM .
2
we now finished
* Note
hogging
: .
