tables - bending moments shear forces and deflection tables
DESCRIPTION
Bending moment diagramsTRANSCRIPT
-
CA NTIL EV&S
'iwc b4 a
L I' L -
Wx2
WaMmax 7
W
cwrvedraight IFrjp Izjg W(&+/8a2b+/2ab3b3)
dmaxfJ(' 24E1+Ja)_______________________
2W___
I/A J/Qa b c
____ ____L. L
M
N ______RAW
4. curved .4strai'ht f_-i ajdnaxjx c/C /5(15bumax. ,(/#
Bending moment, shear and deflection 1077
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CA NT/LEVERS
9 w I 2W
________ ________________
bL -I L 'I
M _T()_2] Mmax = w( 4)
i-.-- curved H straight k IIillWpj1'C 60E1 W(2#SOo2b,4Oab2-H/b)
/SbI dmox 60E1dmax Jf(i+ i7)
IA a b aL L s.j
Mx IX Mx = MCM,,,x P a
A [ I No shears1 N. B. For ant/clockwise moments
the deflect/on is upwards.curved k fCU/hLk
SEX C 2E1d=E2'(, Sb'
1078 Bending moment, shear and deflection
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SIMPLY SUPPORTED BEAMS
w/zL
// T
N
_0122I'ZL/
when x1
'RB
When xadjmt2n(2n)d#n2(242m]When xod4
where mx/L and naa/L
IA BT LRB
R8WRA=RB T
= S WL'"max 384 El
94 R5
Wa fSL2 c2jd,cx.= 96(1
2 /ien
.;
RAfl\_______
RB
dmax j.j (8?_4Lb2#b3)
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MA4nqx. O/28WL
when x,=05774L
L 84p8
Mx = Wx( 2)WL/6
II.x;. I
= WISR8
RB 2W/S4,dmcx
0.0/304 wi!dinaxwhen x =05/PJL51AA BA
T.a 'F b -F aL"A B
I'"mar. 4 ('- 3J
RA=RB =
JdmaxWL5
60(1
Ij x 2X2Mx L"YLJ
Mmax'Wi/i2
RR8 wftj dc,s
A5
d, ur=i(85,7aLL4c2L4I)
i,dmax.
3iffk1
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SIMPLY SUPPORT(O BEAMS
,l. ti.
k"\M -'"cx. 6
N'A=B= W/2
NRa
lOab# 5b2)
6
_____
RB
RA[ R8w/2
4/max.
dmxJi(/5a2#2Oabi'.5b2)
N yzW/a-
Lb
Mmcx _(_m# 'j)iW,en x
WmR8
z_when x= a/i
_______IA
B .7
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SIMPLY SUPPORTED BEAMSP p
L pa
VA4nc P
I I
a>c
,,Ppib*Zc)"C L
Pc(b#2a)MD L
I I
L HP(b *)L
Pot central deflectionodd the values for each Pderived from the formulain the adjacent diagram.
1
M,,, T
I I
I IB'4R8 .
J/nax.PL3
;nax.
RA-R8-PJ/nax.
-
Pb/L Po/L
always occurs within00774 L of tfie centre of the beo,nWhen ba,
d PL3rsa Ia i7centre 48E1L L (LII
This value is a/ways with/nS % of the maximum value.
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PLMmax r PLMC Mf SPLMD
RAI II JB
dpd 23PL3mczx. 648(1
/9 P1!dmax = 304(1
2P
4/PL3768(1
= P
dinax.
d SJPLin ax.
MC=ME
A*C
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SiMPLY SUPPOATED BEAMSpPppPP P
LA (nI) forces BA'9
pp p pb F AB
MCflMDME!fL
A4 A8 "2P;,2'max.
When n is odd. (nL /) p1Mmax When n is even.
Mmcx. n. PL/8
R8'4B("')'%
When n is oddPL3 r i7r it /When n /5 even
dmaxiuu,p4,. . nft_ :# )Jd 6JPLmax. 1000E%
TOTAL LOAD
When n >10, consider the load uniformly distributedThe reaction at the supports = W/2, but the maximum SE
at the ends of the beam W(n;/)11,AWThe value of the maximum bending moment C. WL
The value of the deflection at the centre of the span k.
Value otn A C k2 0 250O 0.1250 O 0/05S 0.3333 0/I/I 001184 03750 0.1250 00/245 Q.4 01200 0.0/266 04/67 OIZSO OO/277 O4286 0/224 00/288 04375 01250 00/289 04444 0/236 00l29/0 O4500 0.1250 00/29
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SIMPLY SUPPORTED BEAMS
L '.1
A CI BA MA(,a + bI ___________
1 L MA M4>M5 'M8MA Al8
_
Al4 1jt'M8Al. GIL MC8 Al . bIL (Al8 antic/ockw,M8
_________________
Shear diagram when MA "M8
PAl Va R4( VsA4 A5 M/L Al4 MB
As shown
M.cb 'a b' When M4M8.dc-31 (zz) ML2For anti-clockwise moments dmcxaii ythe deections are reversed
____________________________
2nd degree_parabola. W Complement of parabola.KiI '1L L
Mx -i (m4-2m#m) Mx (mJm2#4m1_2m4) Mmq .LfL/6RAfl ______J R
A4R5W/2 ,IA_R8_W/z
dmqx
a' 61WL3 28W1maz dmax
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SIMPLY SUPPORTED BEAMS
w unit /oao'C A 0 B
-
AAI_
dc=o_4(jn3,Ln2_ i)(s-)Where
/W.unit booCiA BAD
-HNI L '1QH-
___ W(L#N)(LN)
m.x/L ,,1.N/L
/W.unFt /oaoCADBflL NHA5
MA=MB=-
4..',,rTA
RDL,
RA=RBWNd4f(fC
wL2 N/6(1w unit
_4J4j O5774L0 BE
L IQHAMax. upward deflection is at 0.
NIA
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8(J/LT/N BEAMS
1p1
WL
WLMC
4B WI?.10g/L .O s8L.12/L p
WI!= 384(1
V4a-4..b- "+ c4
MA
MA,b [e(4L-Je)- c 31'4L Jc)]B,bLY4t--7" (4L saj
RA
When r is the sinp/e support reactionM-M M-MA4 L _r3# L
/W wI2 W12-- b -H L -4
ENMA=MB
= = w/2
____
I /dflfl
-J Wa / Ivinax=4f% (LOJ
'-jvl'Ak- L -
in
MA=-.in (Jnr"em+o)M8_ jrn2 (4-3m) ,'Mmax'L,,2( 3si,)/2
kx- When x=2(n,32m42)2
RA= W(m-2) 8 = Wm(2-m)2 2ri,dna.
uWhen a=4/2 and x1=O-445L
WI!3JJ(%
WI!c/C = 384(1
When a = c.
.Ey(L3#2Lba #4Lc?8a)
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B/JILT-/N BEAMS
LA L 8 A C ___M
MA ___________M8 MA V NMB- WL 7/Qx 9x ) M - SWL
#Mmax WL/233 N5Qn x=OS5L MWL//6MA = WI//S M8 = WL/iO
-
R8 RB
R=O.SW R8=O7W RA=RB=W/24J22LFOS6L 22L
WI!
1.4W!!max. - 384E1
when x, = 0 525L
W/2 2W/L HI'a
La- b+_aJ____CL4 F I.
MA M8 (SL44aL_402) MA = M8 -WL//6M=WL/48
JRBR8 W/2 A =R3 W/Z
. L/2 H
O-WL3364(1
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B(//LT-/N BEAMS
fwTw/a____L
MAV NMaMA
AB W/2____
I /d________ 4
Wa /dmax =
2W/a
bL
MA =-J'2(Jo/obL)M3
mAC. Mx =P.X+M3-2W(x.-bPInCB.Mx RB.X#M5
A = (/OLsLa42a)2, prO,,
W/2 W/a W/2-Y HJ
a I b-f
L
1NMBMA Maz_R(4L_3a)
= = W/2
dmax = (/SLMa)
W
bI. L .1
MA MB
MA _!10L_15#502)M3 _lOL2(5L4t
= (/oL-/sLa'#8a)R = '/5L ec)
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BUILT/N BEAMSparabolic total /oao W
JRa'!4 W/2
F4axJ1.3 WL3d,,, 384E!
Any symmetrical load WrA
______
symmetrical diagram
NMBMA = M8 A,JL
where A5 is the area of the 'free'bending moment diagram
ARB
A =R8 = W/2A,
- - I The fic.re shownis ha/f the bending
* + moment diagramC 1* and +7fr- X, -H-X--- LareC.GI
A5x AIX1lmaxatC ZETWhere A' is the area of the fixing
moment diagram
RA R8 W/2
rA
O4WL3dma 384 (2'
a rb2br
2 -2br-----
aab r&_
CM. f(JaL)M8c -M(3b-L)When
'4I=P8 = slope of moment diagramM#M M#MEabWhen '2/L = in,
M. L2m2(/_m)2(1_2m)2E%
For ant/clockwise momentsreverse the deflect/ons
con,c*mentparabo/p
JM8A -M5=-WL//O
MAV NMBAq rM8i.._WL/2O
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BUILT/N BEAMSp p
L/2 L/2 I-. b 8JJF. L
MA L' Al5 MA LZ EEE3 M8- MA = - M5 = M = PL/8 MA=- M5 =
_______
Mc 2Pa2b__________ 1!
A1_____ _____ A__________=P (iT) (I#2 *)= = /,,2
1Q8 = z
4mcx__
I. Xp9 d Po3b3dinax = /92 El C d _ZPa2b3 WQnX="3EI(3L2a)2 JL-Za
p p p p
Pa MA/ \MB- __Pa(L-q) MA=MB=_JPLh6MAMB L
MC MD = P02,'L MC =MD =RAfl AI ILJ I I
PA=P'P
PLdmax = /30(a)7
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BUILT/N BEAMSP p p p
______ IrgfA C D'.L/y 1--L/j .L/j.
MA MB MA LF- 5N M8MA =M = /9PL/72
MD =1/
PArJ__I LJARA = JP/2
p p p P P p pII + + 1I
MAVNMB MAL/L NEiNMBMA =M3=I/PL/j2MD = Mf = SPL/32
max. = 96(1
l,L/3 P.-L/3L2
MA =M8 = 2PL/9MC =MD = PL/p
AL I
S PL3dmax 548?1 4/PL3
A C D BLL/4--L/4 L/4 L/4 34C D E PBL/L/4 +L/4 +L/4 4L14
MA=MB =rSPL/,6= JPL/15
2P
PL3dmax 96(1
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BUILT/N BEAMS
HJ-
Y1F,enniso6 ,I / /Cimox 114-4c (,jiWhennis even,
:.:i O...o.&. ,. 4;.' O44.EfIiiiitiIIIn CONTINUOUS BEAM
}d L/n#-+-L/n4L/n+-L/-#L1-+-44L
L. - When n >10, consider the load .nitorrrdy oYstiibuted -The load on the outside stringers is carried c'/rect/y by the supportsThe continuous beam Is assumed to be horizontal at each supportThe reaction at the supports for each s,oan = W/2. but the maximum
shear force in any span of tM continuous beam = V/J.IAWThe value of the fixing moment at each support = B. WL
The value of the maximum positive moment for each span = C. W4The value of the maximum deflection for each span 0'0O26Value ofn A B C
2 02500 00625 00 6253 03333 0074/ 003704 03750 0078/ 00469S 04000 0-0800 004006 04/67 Qc// 004397 04286 0O8/5 00408B Q4375 00820 00 4309 04444 00823 004/3
10 04500 00825 00425
p pp pA C V t PL/5 +Lg +L,/s+L4
ppppppp4 (n-i) forces B
I I scev,naLJ,
MA LNMB MAMA M52PL/5MD wM PL/5
AArLMA=MB= P1,'/)
'A B=2'
d = 13PL3max. 1000 El
COLUMN LOAD PER SA4NW
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WL= ---
WL3dmax. - ____
PROPPED CAN T/L(VERS
/WA C B
Web LBA
b.f- c.J
L'
MA7tSMA = d2-c2)(29c2_c12)
-____
L R8=r5Where and r3 are the simplesupport reactions for the beam
(MA being considered positive)
w/
MA
W
A C B
3L/8 - 9W!.C
___
Ca
-f-b
MA= f (2n)2were a/Ln#MmaxRA -n (4-n)]
RAi4J[8n2(4n)]1
P3 Hn2( fl)
dC(/_I2n#7n2_n)
--_J P8P3 =f
x/LmLA'max.
d=j(m Jm3#2m)
MA
'P
MA=
A IJ2 (o - n 2)= f (n'-n-pi.e)
a, d=J42/n3(3n?-6b5When x a.dj[2p4p3n (n-6n,'.8)+_________
pn2(jn2_8n#6)]
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PROPPED CANTILEVERS
W/2 W/21' C U BA
f a-HL
MA
if = % then between B and U.Al,. = ftx4xa(4 -Sm+Zm9]+M,n0x. when x=I'4Jm#2rn2,
20)
RB
MAZ_1027SLf X/L = mx H
Mx(2Qm'27m#7)A 7WL
'''max.
'9:4=0 67L]
= (2i."#soi. 42)p8 = (2L2_30L#40')
Vx i(9_rn2)A PB =
- OO0/WL3ElWhen x=0598L
W/? W/2
-LMA
RB
3WLMA
#MmaxO0454 WL[When x 0 283L]
4W= T RB = * p_LA - /3WB - 32
- 00047WL'dmax (IWhen x=O447L
iiWhen x=0404L
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PROPPED CANT/LEVERS
a
_____
C B A A _____aL iR8 L A5___ ___
0577bI S
0/28 Wa
MAMA
_________________
JLBQt we enCandA, Mx=R5.x-j!('x-b) M5=R5.x -
(JaL/5aL#2OL2) =_ j9(si.2_j,2)#Mmox when xb# fI/-
___ RAt NJR5A8 =('5L a) = 9 (si!,/)
W P5 A8 = (t+SaL2)2W
2W W__________ ____________ -
____
C______ ____a " b' 4a .. b IL R3 L
H0577aH 0/28 Wafx Wab H042Jb
MA
When ,n=a/L 2 3m#2 I
MC=AB.b MA=_f/0L2-3b2)Between AandC RA I
=RAW52/a2 I_______________ Between C and B \}.x--H \ IRS Vx=RA_Wrc24Z NA8 = '('/SL 4a) A3 = [L(//L -/S,i#(5L- a)]
RA=W-RB RA=W-RB
1096 Bending moment, shear and deflection
Steel Designers Manual (6th Edition) - Bending moment, shear and deflection tablesDiscuss me ...
Crea
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on 0
2 M
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9Th
is m
ater
ial i
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s re
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cond
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fAA 51 CD1. L
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PROPPED CANTILEVERS
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TflM3 -2M4 =M
4I
dmaxIdo
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a#b)#a2(2# VJ'-dmax"
Bending moment, shear and deflection 1097
Steel Designers Manual (6th Edition) - Bending moment, shear and deflection tablesDiscuss me ...
Crea
ted
on 0
2 M
arch
200
9Th
is m
ater
ial i
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pyrig
ht -
all r
ight
s re
serv
ed. U
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f thi
s do
cum
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s su
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to the
term
s and
cond
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of th
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lbiz L
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e Agre
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-
PROPPED CANT/LEVERS
W/2
AB
Wa
MA _4(2L_a)
NBA -(4L?#ZaL az)
W
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RAI\ I '?&A477(2/1!#4aL 4a2)
A8
1098 Bending moment, shear and deflection
Steel Designers Manual (6th Edition) - Bending moment, shear and deflection tablesDiscuss me ...
Crea
ted
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200
9Th
is m
ater
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ht -
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ight
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se o
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s do
cum
ent i
s su
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to the
term
s and
cond
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of th
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e Agre
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-
SWL
M .('/Om-ZOm#7m)#My,OO888WL,when X
0 3965L
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A6
MAW-' lz' ,nax.MA-O./93PLwMn baO577L
M=('Z-# p)maxA1-0./74PL
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PROPPED CANT/LEVERS
7WB
MA
A51
F9
Bending moment, shear and deflection 1099
Steel Designers Manual (6th Edition) - Bending moment, shear and deflection tablesDiscuss me ...
Crea
ted
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200
9Th
is m
ater
ial i
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ight
s re
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se o
f thi
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cum
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s su
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to the
term
s and
cond
itions
of th
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lbiz L
icenc
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-
PROPPED CANT/LEVERS
AC D EB*L/L/3 Lb
Pp PA C D E+V4+L/4 +-/4
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PALI
PAJ3 J2dmax00209 zr
P PP PLj.4C DEFBA
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'4
MA
4P 2P
dx 00152
P P P
MA MA
/9PLMA= 48M -. M ....SJPL0 96 288
dxOQ/69
1100 Bending moment, shear and deflection
Steel Designers Manual (6th Edition) - Bending moment, shear and deflection tablesDiscuss me ...
Crea
ted
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2 M
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200
9Th
is m
ater
ial i
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pyrig
ht -
all r
ight
s re
serv
ed. U
se o
f thi
s do
cum
ent i
s su
bject
to the
term
s and
cond
itions
of th
e Stee
lbiz L
icenc
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-
PROPPED CANILEVEPSp p p pD E F19
L/4tL/4tL/44L/MA
P PPPP Ppforces B
MAE7ZTJPL(,,?l)MA= 8nJSPLMA= -
Ad /S7PLrT( 5/2
P8
GOOZZl
RAEL (5n2-4n-i)RB = (34z_4fl#/)
whennis!or9e, dmax. /85(1
Any symmetrical load W
AreaR L AreoS'BMA
VAr000 XIf AArea of free B.MDiagramM-
A8
P =!82 L
JA ____I.
a=L
a>O423L _rcO423La< O423L
M1 9(2_6n#sn')MCA (2 6n# Pn?3ni
-SnIt'B
LIn Case!, R SM/ZL
CaseS, A= M/L
dmax occurs at point correspondingto Xon M diagram, the area Abeing equal to the area 0
Area SXxVmax =
Bending moment, shear and deflection 1101
Steel Designers Manual (6th Edition) - Bending moment, shear and deflection tablesDiscuss me ...
Crea
ted
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2 M
arch
200
9Th
is m
ater
ial i
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pyrig
ht -
all r
ight
s re
serv
ed. U
se o
f thi
s do
cum
ent i
s su
bject
to the
term
s and
cond
itions
of th
e Stee
lbiz L
icenc
e Agre
emen
t