Justification du hourdis
I / HYPOTHESES DE CALCUL: 1°) Mode de calcul:
nbre de poutres 8 2°) Caractéristiques géométriques : b2 = 1.5070 m b1 = 0.450 m L= 17.000 m bentrto!e = 0.!00 m a= b= "# = $t = $ro%$ab$e = $&ta'ro%$ =
Distance entre-axes des poutres Largeur supérieure de la poutre préfabriquée ortée des poutres
1.057 m 1&.70 m
"paisseur de l#entretoise $largeur% Distance entre nus des poutres Distance entre nus des entrtoises
0.'00 m 11.00 m 8.00 m 8.00 m
"paisseur du (ourdis Largeur du tablier Largeur roulable Largeur d#étanc(éité et couc(e de roulement
3°) Matériaux à utiliser: )éton dosé * 400+g,m!
; f c'8
!0 a
; f t'8
'.4 a
; f bu
17 a
rmatures * (aute ad(érence /" " 400 /issuration préudiciable ss '1&<1 pa ontrainte limite d#ad(érence tsa
!.0 cm
p'
'.'00 ,m! ,m! épaisseur épaisseur et poids olumique olumique étanc(éité étanc(éité
(r
0.020 m
p!
'.500 ,m! poids olumique béton
P=
0.710 ,m3 a a
(arge permanente 0.022 m,ml 0.!75 ,ml
2°) Sous l'effet des surcharges d'exploitatio: a6% oefficient de maoration dnamique9 (n)portée * ax) ax)largeur roulable * distance L 10.55m nous considérons pour le calcul du coefficient de maoration dnamique un rectangle 11.00x D#o: les c(arges permanentes portées par ce rectangle 9 Dalle 9 58.0'0 "tanc(éité 9 5.570
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ouc(e de roulement 9 ornic(es 9 =lissi>res de sécurité 9 =arde-corps 9 rottoirs 9
0.5!! ,ml 0.'50 ,ml 0.0'4 ,ml 0.81' ,ml +=
?bc ?c1'0 onoi )c 9 onoi c1'0
1'.15' 5.&17 '.&!7 0.'5! 8.5&1
&& 110 d= d=
,2-.1# T ?urc(arge ) maximale susceptible d#@tre pla ?urc(arge maximale susceptible d#@tre pla
1.'12 1.'&&
Ampact d#une roue sur le feuillet moen 9 u uo 1<5 ( r (d o 1<5 ( r (d
%#
re1@tement dalle
(r (d,' (d,'
plan mo8en %
%# /#
/
rectangle de répartition $ u x 1 % rectangle d#impact $uo x 1o%
%
b6% ?ollicitations dans le panneau de dalle 9 Les résultats du tableau suiant sont déterminés * partir des sorties du prologiciel - Dalle Cono
(o0ent! a% entre % 3annea% !en! $on4t%na$'(2'
!en! tran!er!a$'(1' 5 5t 5r (12# a $ 1n'%d
1.!20 1.580 1.8&0 1.!&0 aec n =
1.140 1.'80 1.5'0 0.2'0 0 en "LB
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(o0ent! 5 5t 5r (12#
(a )T0/0$6 1.&25 1.2'& '.'&8 1.7'1
Les moments totaux max pondérés sont9 Etat ELU (o0ent! (a )T0/0$6 )c '.854 )t !.''& )r !.774 c1'0 '.458 (AX
!.774
(b )T0/0$6 1.!20 1.5&1 1.85! 1.1&5
(a )T0/0$6 1.27! '.'!8 '.&!8 1.254
(b )T0/0$6 1.7'2 1.24& '.!07 1.502
(b )T0/0$6 '.'!1 '.505 '.274 1.57'
ELS (a )T0/0$6 '.4&& '.785 !.'&5 '.054
(b )T0/0$6 '.075 '.!!5 '.7&8 1.502
'.274
!.'&5
'.7&8
D#o: les moments fléc(issants de calcul sont 9 Sen! tran!er!a$ Sen! $on4t%na$ "n traée ?ur appui "n traée ?ur appui 0.8 a $m,ml% $m,ml% -0.5 a $m,ml $m,ml%% 0.8 b $m,ml% $m,ml% -0.5 b $m,ml $m,ml%% !.012 -1.887 '.!72 -1.487 '.&1' -1.&!! '.'14 -1.!84
Etat ELU ELS
c% alcul et érification de l#effort tranc(ant E 10 . d
pour une roue )r
E
1'.12'
u0
0.&00 m
u
0.2!5 m
0
0.!00 m
Fu F
0.&!5 m 4.8&7 4.!47
G
14.7& cm
Fu E ,$'u% F E ,!u "fforts tranc(ants pondérés
tu
Fa Fb
8.!18 &.27&
b0
1.000 m tu
0.5&4 a
c% érification de la condition de non poinHonnement Cn doit satisfaire * la condition 9 Eu I 0.045 uc (0 fc Eu Eu 1.5;1.07 E 12.5&8 u '$ % ! 140
f c f c'8 , gb
'0 a
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sous lJeffet de la surc(arge Les moments de calcul sont9 ; "n traée 9
)c
1 file
"LB 9 "L? 9
!.171 m,ml '.!70 m,ml
"LB 9 "L? 9
-1.28' m,ml -1.481 m,ml
; ?ur appui
Bne comparaison faite entre les aleurs des moments fléc(issants dans le sens tranersal de la flexion locale et ceux de la flexion globale montre que ceux derniers sont déterminants
Etat ELU ELS
Sen! tran!er!a$ "n traée ?ur appui a $m,ml% a $m,ml% !.171 -1.28' '.&1' -1.&!!
Sen! $on4t%na$ "n traée ?ur appui b $m,ml% b $m,ml% '.!72 -1.487 '.'14 -1.!84
IV / DETER(INATION ET VERIFICATION DU FERRAILLA+E : 3°) détermiatio et !érificatio des ferraillages tras! et log : Le ferraillage est déterminé et érifié moennant le logiciel KC)C
a - /erraillage * l#"LB dans le sens transersal 9 ; "n traée 9
u
!.171 m,ml 5.20 cm3 -1.28' m,ml
s$adopté%
11.!1 cm3
101'
; ?ur appui 9
s u st
!.70 cm3
s$adopté%
11.!1 cm3
101'
'.50 cm3 -1.487 m,ml
s$adopté%
5.&5 cm3
51'
'.50 cm3
s$adopté%
5.&5 cm3
51'
b - /erraillage * l#"LB dans le sens longitudinal 9 ; "n traée 9 st st
4.40 cm3 ; ?ur appui 9 '.70 cm3
u smin u smin
'.!72 m,ml
- Férification du /erraillage * l#"L? dans le sens transersal 9 ; "n traée 9 s st enrobage inf
'.&1' m,ml 11.!1 cm3 cm3 !.0 cm
ss sb
1&4.0 a &.4 a
s st enrobage sup
-1.&!! m,ml 11.!1 cm3 cm3 !.0 cm
ss sb
10'.0 a 4.0 a
; ?ur appui 9
- Férification du /erraillage * l#"L? dans le sens longitudinal 9
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s st enrobage sup f trans
-1.!84 m,ml 5.&5 cm3 4.' cm
ss sb
1!&.' a 4.0 a
"°) #érificatio des armatures du hourdis !is$à$!is de l'effort de glissemet à sa %octio a!ec la poutre: La section des armatures de couture nécessaire calculée auparaant est assurée par les armatures transersales du (ourdis . ''.&' cm3
M
4.8' cm3
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ment
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ée sur le rectangle cée sur le rectangle
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-1.&5 -'.11 -'.05 -'.&'
-0.8! -1.12 -1.!8 -1.12
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'.'2' 1.48' 0.000 0.257 -0.'55 0.7&4 1.040
5 5 5 5t 5t 5r ($tare
1 9$e 2 9$e! 9$e! 1 tane0 2 tane0! 1 ro%e (12#
1.!05 0.2'1 0.000 0.&54 -0.174 0.5'' 0.8''
1 9$e 5 5t 5r ($tare
2 9$e! 9$e! 1 tane0 2 tane0! 1 ro%e (12#
'.!70 1.5&0 0.078 1.0!5 -0.17& 0.84' 1.118 ELS
'.'2'
)c
1 file
'.'217'0&4
(a;
'.!70
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!.171 '.088 0.105 1.!85 -0.'!5 1.1'7 1.510 ELU
!.171