Tài liệu Sổ tay Kỹ Thuật Thuỷ Lợi -Phần 1-Tập 2 -Chương 4 docx
Bạn đang xem bản rút gọn của tài liệu. Xem và tải ngay bản đầy đủ của tài liệu tại đây (890.49 KB, 41 trang )
Ch"¬ng 4 - kÕt cÊu thÐp !"
!"
#
#
#
Ch"¬ng 4
#
KÕt cÊu thÐp
#
!"#$%&'#($)*+,$-+,$./$-01#0$23!$
2!45$67#0($)*+,$-+,$89$.:#$2;<$
#
#
4.1. C¬ së thiÕt kÕ kÕt cÊu thÐp
4.1.1. Ph-¬ng ph¸p tÝnh kÕt cÊu thÐp theo tr¹ng th¸i giíi h¹n
$%&#'()#&*+,-#'./0#/*1#'2'#3456#7%&#'()#89:#;</0#7*2'#=7%&#'()#0>-#7%&#'()#?@&A/0#
'B&#&*+,-CCCD-#E1F'#&G/*#&42/#&*H4#,*1I/0#,*2,#&J5/0#&*26#06K6#*5/C#LJ4/0#7%&#'()#&*+,#
&J5/0#&*26#06K6#*5/#=LLMND#E1F'#'*6O#&*P/*#*O6#/*QRS#
T#U*QR#LLMN#&*V#/*(&S#WX#'1Y/0#EZ#WP#[/#E\/*C#
T#U*QR#LLMN#&*V#*O6S#WX#?6%/#;5/0#*4]'#'*):^/#W\C#
L*H4#/*QR#LLMN#&*V#/*(&-#E6X)#76_/#E^#7%&#'()#'Q#E`#7*a#/b/0#'*\)#3<'#WX#
'1Y/0#EZ#WP#[/#E\/*#E1F'#?6^)#;6c/#;1K6#;5/0#dO)S#
#U#e#
'
6/66/
U'/U'fg
Sg=Sg£F= #######################=hC"D#
&J4/0#EQS#
#U#T#/Z6#3<'#&G/*#&42/#;4#&[#*F,#&a6#&Ji/0#&G/*#&42/#?(F6#/*(&j#
#U
6
#T#/Z6#3<'#&G/*#&42/#;4#&a6#&Ji/0#&G/*#&42/#k
6
j#
c
i
N T#/Z6#3<'#;4#&a6#&Ji/0#&6@)#'*)l/#
'
6
k
=&a6#&Ji/0#3K/#/*(&#&J4/0#E6X)#76_/#dm#;n/0##
###?o/*#&*1Y/0Dj#
/
6#
T#*_#dB#3_'*#&a6-#8+&#&K6#&a6#&Ji/0#&*<'#&%#'Q#&*^#7*2'#&a6#&Ji/0#&6@)#'*)l/#RZ&##
##'2'*#?(F6-#Wp:#&a6#&Ji/0#&G/*#&42/#k
6
#?q/0#&a6#&Ji/0#&6@)#'*)l/#/*9/#WK6#*_##
##dB#3_'*#&a6S#
#k
6
#e#/
6
'
6
k
#
g
/
#T#*_#dB#O/#&4P/#WX#dm#;n/0-#8+&#&K6#RV'#EZ#r)O/#&Ji/0#'`O#'A/0#&Jo/*j#
'#T#*_#dB#&[#*F,-#8+&#&K6#'2'#&a6#&Ji/0#3K/#/*(*A/0#8)(&#*6_/#Es/0#&*Y6j#
F
#T#7*a#/b/0#'*\)#3<'#'`O#7%&#'()#?q/0#&G'*#dB#'`O#E]'#&J1/0#*o/*#*i'#f#'`O#&6%&##
##;6_/#'()#76_/#WK6#'1Y/0#EZ#&G/*#&42/#g#'`O#Wp$_)#WP#*_#dB#E6X)#76_/#3PR##
##W6_'#
g
C#
! # ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
t1Y/0#EZ#&G/*#&42/#g#'`O#Wp$_)S#
#g#e
'
W3
g
g
#
Wp:#'1Y/0#EZ#&G/*#&42/#g#?q/0#'1Y/0#EZ#&6@)#'*)l/#g
'
#'*6O#'*4#*_#dB#O/#&4P/#'`O#Wp&#
36_)#g
W3
C##
t1Y/0#EZ#&6@)#'*)l/#g
'
#3(:#?q/0#V/0#d)(&#'*a:#s
'
#
'`O#&*+,
#
7*6#&G/*#&*H4#06K6#*5/#
'*a:#WP#g
'
#3(:#?q/0#V/0#d)(&#?X/#7+4#EV&#s
?#
7*6#&G/*#&*H4#06K6#*5/#?X/-#8HR#?a/0#hT C##
L*H4#/*QR#LLMN#&*V#*O6-#E6X)#76_/#WX#?6%/#;5/0#*4]'#'*):^/#W\#E^#7%&#'()#E1F'#
dm#;n/0#?o/*#&*1Y/0S#
#
][cP
in
c
i
c
DÊdgS=D
##################################=hC D#
&J4/0#EQS#
D
'
T#?6%/#;5/0#*4]'#'*):^/#W\#'`O#7%&#'()#;1K6#&2'#;n/0#'`O#'2'#&a6#&Ji/0#&6@)##
###'*)l/#&J4/0#/*u/0#&[#*F,#?(F6#/*(&j##
d
6
#T#?6%/#;5/0#*O:#'*):^/#W\#;4#&a6#&Ji/0#EI/#W\#d6/*#JOj#
v
D
w#T#?6%/#;5/0#*O:#'*):^/#W\#06K6#*5/C#
g
/
-#'#T#8HR#'A/0#&*V'#=hC"DC#
#
t2'#dB#36_)#'Q#36@/#r)O/#E%/#&*6%%#7%&#'()#&*+,#8HR#L6@)#'*)l/#&*6%%#T#$%&#
'()#&*+,#LtxU#yyzyT{"#*6_/#*P/*C#
#
4.1.2. Vật liệu thép dùng trong kết cấu
#
t2'#3456#&*+,#;|/0#3PR#7%&#'()#,*a6#3<O#'*i/#&*G'*#*F,#&)}#&*H4#RV'#EZ#r)O/#
&Ji/0#'`O#'A/0#&Jo/*-#E6X)#76_/#3PR#W6_'-#&G/*#'*(&#'`O#&a6#&Ji/0#WP#,*1I/0#,*2,#36@/#7%&C#
L*+,#;|/0#&J4/0#'2'#7%&#'()#'*\)#3<'#'~/#'*i/#3456#&*+,#3#MOJ&6/#*4]'#3#r)O:#&*[6#
A8:-#JQ&#dA6#*4]'#/mO#&ĩ/*-#&ĩ/*-#'Q#R2'#&1I/0#E1I/0#WK6#'2'#R2'#&*+,#ttL3h-#ttL38-#
ttLh #&*H4#L6@)#'*)l/#LtxU#"z6yS"{zy#WP#'2'#R2'#&1I/0#V/0#WK6#LtxU#yz!{S"{{3-#
'2'#R2'#&*+,#*F,#76R#&*(,#&*H4#LtxU#3"!hS"{z{C#L*+,#,*a6#E1F'#EaR#?a4#,*|#*F,#
WK6#'2'#&6@)#'*)l/#/@)#&J@/#'a#WX#&G/*#/b/0#'I#*i'#WP#'a#WX#&*P/*#,*~/#*42#*i'C##
L*+,#;|/0#E^#'*%#&54#,*~/#EZ/0#7%&#'()#WO/#'Q#&*^#;|/0S#
T##L*+,#'O'?4/S#ttL38Ty-#ttL38/y-#ttL38/M/yC#
T##L*+,#*F,#76R#&*(,S#!{M/ -#!{M/ f6-#"!M/ f6"-#"hM/ A-#"!tJf6U6-CCC#
#
t1Y/0#EZ#&G/*#&42/#'`O#Wp$_)#&*+,#'2/#&J4/0#'2'#&J5/0#&*26#V/0#d)(*2'#/*O)#
E1F'#&G/*#&*H4#'2'#'A/0#&*V'#'*4#ở#?a/0#hT"C##
Ch"¬ng 4 - kÕt cÊu thÐp !3
!3
3#=$>?@,$AB#=$C0;D$EFD$6G#0$DHI#=$6J$C7#0$C&F#$DK<$C0LM$DF#
!"#$%&'()%*#$%+,-&%./%')0,%123#$%45%&6#'%&7(#%
8%.97:%#9#%;<%,=#%
>%
>%?%s
@
Ag
;B%
8%1C&%>
@%
>
@%
?%D:EFGs
@
Ag
;B%
- ÐH%IJ&%BK#%4L,%IM&%N')%&O%+(&%
>
PI%
>
PI%
?%s
Q
Ag
;B%
- ÐH%IJ&%&!7#$%R%&!S@%N')%&)TH%UM@%@'J&%
>
PIG@
%
>
PIG&%
?%D:Es
Q
Ag
;B
%
- ÐH%&'P7%423#$%N6#'%@7#%BV#%
>
@B%
>
@B%
?%D:DWEs
Q
Ag
;B%
#
Chó thÝchS#g
W3
#T#*_#dB#O/#&4P/#WX#Wp$_)-#3(:#?q/0#"-!y#'*4#Ri6#R2'#&*+,C#
#
t1Y/0#EZ#&6@)#'*)l/#WP#'1Y/0#EZ#&G/*#&42/#'`O#RZ&#dB#3456#&*+,#'O'?4/#&*A/0#
;n/0#'*4#ë#?a/0#hT -#'`O#&*+,#*F,#76R#&*(,#'*4#ë#?a/0#hT3C#t1Y/0#EZ#&G/*#&42/#'`O#
RZ&#dB#3456#&*+,#;|/0#E^#'*%#&54#7%&#'()#'*\)#3<'#'`O#,*~/#EZ/0#'mO#WO/#&J4/0#'A/0#
&Jo/*#&*`:#3F6#V/0#WK6#&[#*F,#&a6#&Ji/0#'I#?a/#WP#E∙#8+&#&K6#E6X)#76_/#3PR#W6_'#'`O#7%&#
'()-#'Q#&*^#&*OR#7*a4#?a/0#hThC#
#
3#=$>?N,$AHI#=$6J$C!"5$D05O#$P1$DHI#=$6J$C7#0$C&F#$DK<$C0LM$D<DQ&#$$
$$$R-A.S$TUVW(@WWXY$$$$$$$$$$
123#$%45%&)K,%@',X#%>
@
%;<%@23#$%45%&6#'%&7(#%>%
@YZ%&'9H%;[)%45%\<]%d^II_:%^`aZ_%
d%£%WD%WD%b%d%£%cD%cD%b%d%£%dDD%
`(@%&'9H%
s
@%
>%
s
@%
>%
s
@%
>%
123#$%45%N97%4*&%&)K,%
@',X#%s
Q
%N'e#$%H'S%
&',5@%@')f,%\<]%d ^II_%
11 gc%
11 gF%
11 cW%
WWD%
WcD%
WhD%
WdD%
WgD%
WcE%
WdD%
WgD%
WED%
WDD%
WWD%
WcD%
WDD%
WWD%
WcD%
diD%
WdD%
WgD%
gcD%
gFD%
cWD%
#
Chó thÝchS##T#$*6#&G/*#&*H4#06K6#*5/#'*a:#g
'#
e#s
'
j#
###################T#$*6#&G/*#&*H4#06K6#*5/#?X/#g
'#
e#s
?
j#
###################T#"#MkO#e#"#U/RR
#e#"!#;OU/'R
C#
############
3#=$>?X,$AHI#=$6J$C!"5$D05O#$P1$DHI#=$6J$C7#0$C&F#$DK<$C0LM$0ZM$[!\$C0]M$$$$$$$$
123#$%45%&)K,%@',X#%>
@
%;<%@23#$%45%&6#'%&7(#%>%@YZ%&'9H%;[)%45%\<]%d ^II_:%^`aZ_%
d%£%WD%WDb%d%£%gD%gD%b%d%£%hD%
`(@%%
&'9H
s
@%
s
Q%
>%
s
@%
s
Q%
>%
s
@%
s
Q%
>%
Di`#W%
dc`#W%
dh`#j)%
Di`#Wj)%
dD`#Wj)d
%
gdD%
gcD%
gWD%
ggD%
ghD%
cED%
chD%
ciD%
cFD%
EdD%
WiE%
gWE%
gDE%
gdE%
gcE%
gDD%
ggD%
gDD%
gdD%
gED%
cED%
chD%
cFD%
ckD%
EDD%
WFE%
gdE%
WFE%
WiE%
ggE%
8%
8%
WiD%
WiD%
gcD%
8%
8%
ckD%
chD%
cFD%
8%
8%
WkE%
WkE%
gWE%
#
Chó thÝchS##T#$*6#&G/*#&*H4#06K6#*5/#'*a:#g
'#
e#s
'
j#
###################T#$*6#&G/*#&*H4#06K6#*5/#?X/#g
'#
e#s
?
C
!h# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
3#=$>?>,$AHI#=$6J$C7#0$C&F#$DK<$C0LM$^_#=$`1\$[aC$D]5$D0G5$`bD$$
$$$$$$$$$M0c#$6J#=$DK<$Dd<$P<#$Ce&#=$DB#=$Cef#0$C0Kg$`Z!$Rh)<Y$
#
'9H%+=%')0,%
l`1 g1P N')%@')f,%\<]%@YZ%
&'9H%@(#%4m#'%'O#'%Ê%WD%II%
;<%@YZ%&'9H%Qn#%Ê%cD%II%
&!7#$%@oZ%;Z#%
dDGW1D%
&!7#$%@oZ%;Z#%
!"#$%&'()%*#$%+,-&%
./%%
')0,
p'qI%d%~%c%
p'qI%h%
p'qI%d~c%%
p'qI%h%
- K97:%#9#%\r@%&!S@%%
- .97:%#9#%N')%,=#%%
- 1C&%
8%éH%IJ&%BK#%4L,%IM&%N')%&O%+(&
%
>%
>
,
%
>
@
%
%>
PI%
dci:D%
dEh:E%
Fi:E%
WWg:D%
dhF%
dkh%
dDd%
WEd%
Wdc%
WWE%
dWi%
gWW%
Wcd%
WEF%
dcE%
ghW%
##
4.1.3. Vật liệu thép dùng trong liên kết
4.1.3.1. Vật liệu thép dùng trong liên kết hàn
$6R#3456#r)H#*P/#,*a6#'Q#'1Y/0#EZ#7+4#EV&#&V'#&*Y6#7*A/0#/*ỏ#*I/#&J\#dB#&1I/0#
V/0#'`O#&*+,#E1F'#*P/-#7*6#*P/#&O:#r)H#*P/#3(:#&*H4#LtxU#3 3S"{{hC#t1Y/0#EZ#&G/*#
&42/#'`O#36@/#7%&#*P/#EB6#WK6#/*u/0#;5/0#36@/#7%&#WP#&J5/0#&*26#V/0#d)(*2'#/*O)#E1F'#
82'#E\/*#&*H4#'2'#'A/0#&*V'#&J4/0#?a/0#hTy#WP#hT6C#t1Y/0#EZ#&G/*#&42/#'`O#36@/#7%&#*P/#
&J4/0#7%&#'()#,*~/#EZ/0#'*\)#3<'#'`O#'mO#WO/#'A/0#&Jo/*#&*`:#3F6#V/0#WK6#&[#*F,#&a6#
&Ji/0#'I#?a/#WP#E#8+&#&K6#E6X)#76_/#3PR#W6_'#'`O#7%&#'()#'*4#ở#?a/0#hTzC#
#
3#=$>?T,$AB#=$C0;D$EFD$6G#0$DHI#=$6J$C7#0$C&F#$DK<$\i!$01#$
#
s"#$%B)K#%NT&
%
!"#$%&'()%*#$%+,-&%./%')0,%123#$%45%&6#'%&7(#
%
8%p9#:%N97%;<%,=#%N')%N)tI%&!Z%@'-&%B2u#$%@YZ%423#$%
%
%%%'<#%Qv#$%@(@%H'2w#$%H'(H%;x&%B/%%
>
'%
>
'%
?%>
%
%8%p9#:%N97%;<%,=#%N')%N)tI%&!Z%@'-&%B2u#$%@YZ%423#$%
%
%%%'<#%Qv#$%@(@%H'2w#$%H'(H%&'e#$%&'23#$%
>
'
%>
'%
?%D:FE>%
y<#%4=)%4L,%
8%1C&%
h
c
R
%
h
c
R %?%>
@%
%% 'P7%N)I%B7")%@YZ%I=)%'<#%
h
g
R
%
h
g
R ?%D:EE
*
?
s
Ag
'%
y<#%$q@%8%1C&%^z,]%2[@_%
%% 'P7%N)I%B7")%@YZ%Q)K#%#q#$%%%
%%%@'n]%
b
g
R
%
b
g
R ?%D:cEs
Q%
#
Chú thích:
"C#g#3P#'1Y/0#EZ#&G/*#&42/#'`O#&*+,#E1F'#*P/C#
C#s
?
-
h
b
s 3P '1Y/0#EZ#7+4#EV&#&6@)#'*)l/#'`O#&*+,#E1F'#*P/#WP#'`O#76R#3456#*P/C#
3C#N_#dB#EZ#&6/#'p:#WX#'1Y/0#EZ#'`O#RB6#*P/#g
*#
e#"- y#7*6#
h
b
s <#h{!#MkO##
##############WP#g
*
#e#"-3y#7*6#
h
b
s <#y{!#MkOC#
Ch"¬ng 4 - kÕt cÊu thÐp !y
!y
3#=$>?j,$AHI#=$6J$[L&$6;C$C!"5$D05O#$
s
0
Q
$P1$DHI#=$6J$C7#0$C&F#$
0
=
k
$
$$$$$$$$$$DK<$[!\$`&'!$01#$Ce&#=$\i!$01#$=lD$Rh)<Y$
#
{7")%z,P%'<#%%
&'P7% 1|p%gWWg}diic%
123#$%45%N97%4*&%&)K,%@',X#%
h
b
s ^`aZ_%
123#$%45%&6#'%&7(#%%
h
g
R %^`aZ_%
pcW:%pcW8hl%
pch:%pch8hl%
pED:%pED8hl%
cdD%
cED%
ciD%
dFD%
WDD%
WdE%
#
3#=$>?U,$AHI#=$6J$C7#0$C&F#$DK<$`!"#$[aC$01#$Ce&#=$[aC$D]5$D0G5$`bD$
$$$$$$$$$$M0c#$6J#=$DK<$Dd<$P<#$Ce&#=$DB#=$Cef#0$C0Kg$`Z!$Rh)<Y$
#
'9H%+=%')0,%
l`1 g1P N')%@')f,%\<]%@YZ%
&'9H%@(#%4m#'%'O#'%£%WD%II%
;<%@YZ%&'9H%Qn#%£%cD%II%
&!7#$%@(@%@oZ%;Z#%
dDGW1D
&!7#$%@oZ%;Z#%
{7")%
423#$%'<#
%
!"#$%&'()%*#$%+,-&%
./%%
')0,
p'qI%d~c%
p'qI%h%
p'qI%d~c%%
p'qI%h%
.97%
h
k
R
%
dci%dhF%Wdc%Wcd%
p9#%
h
n
R %
dEh:E%dhF%Wdc%Wcd%
~=#%
h
u
R %
Fi:E%dkh%WWE%WEc%
•=)%4L,
%
1C&%
h
c
R %
WWg%dDd%dWi%dcE%
%%.97:%#9#:%,=#:%@C&%N')%N)tI%
%
%%&!Z%@'-&%B2u#$%Qv#$}%
%
%
%
%
%
%
%
%
%
y<#%$q@
%
%8%a'2w#$%H'(H%&)K#%&)T#%
%8%a'2w#$%H'(H%&'e#$%&'23#$
%
h
g
R%
dDc:E%
kE:E%
ddk:E%
Fc:E%
dED%
ddc:E%
dhF:E%
dWi%
#
#
4.1.3.2. VËt liÖu thÐp dïng trong liªn kÕt bul«ng
xp$_)#3PR#?)3A/0#,*a6#,*|#*F,#WK6#:@)#'~)#'`O#LtxU#"{"6S"{{yC##
t1Y/0#EZ#&G/*#&42/#'`O#36@/#7%&#RZ&#?)3A/0#E1F'#82'#E\/*#&*H4#'2'#'A/0#&*V'#
&J4/0#?a/0#hT8-#'2'#?a/0#hT{#WP#hT"!C#
#
!6# ########sæ tay KTTL * PhÇn 1 - c¬ së kü thuËt thñy lîi * TËp 2
3#=$>?m,$AB#=$C0;D$EFD$6G#0$DHI#=$6J$C7#0$C&F#$DK<$`!"#$[aC$\JC$Q5`B#=$
#
123#$%45%&6#'%&7(#%@YZ%B)K#%NT&%I5&%Q,Be#$%
1C&%;<%N97%@YZ%I5&%Q,Be#$%;[)%@-H%45%Qf#%
!"#$%&'()%%
*#$%+,-&
%
./%
')0,%
cGh:%EGh:%hGh%cGF:%EGF%FGF:%dDGi%
ÐH%IJ&%@YZ%@-,%N)0#%
Qv#$%&'9H%@q%s
@%
b%ccD%`aZ
%
1C&%
b
c
R
%
b
b
b
c
38,0R s=
%
b
b
b
c
4,0R s=
%
b
b
b
c
4,0R s=
%
8%
.97%
b
k
R %
b
b
b
k
42,0R s=
%
??
7?
g!-h
=s
%
??
7?
g!-y
=s
%
8%
ÐH%IJ&%
b
em
R
%
%%%ZG%l,Be#$%@q%45%@'6#'%U(@%@Z7%
%
%%%QG%l,Be#$%@q%45%@'6#'%U(@%QO#'%&'23#$%;<%Q,Be#$%&'e
%
b
b
b
em
)
E
3405,0(R s
s
+=
%
b
b
b
em
)
E
2805,0(R s
s
+=
%
#
3#=$>?W,$AHI#=$6J$C7#0$C&F#$DK<$Q5`B#=$D0G5$[L&$P1$D0G5$DnC$
#
123#$%45%&6#'%&7(#%@YZ%@(@%B7")%Q,Be#$%^`aZ_%;[)%@-H%45%Qf#%
!"#$%&'()%
*#$%+,-&%
./%')0,%
cGh%cGF%EGh%EGF%hGh%FGF%
1C&%
b
c
R %
dED%dhD%diD%WDD%WgD%gWD%
.97%
b
k
R %
dkE%dhi%WdD%WDD%WED%cDD%
#
#
Chó thÝchS#M62#&J\#&J4/0#?a/0#E1F'#&G/*#&*H4#'A/0#&*V'#&J4/0#?a/0#hT 8#WP#3PR#&J•/#E%/#y#MkOC#
#
3#=$>?@V,$AHI#=$6J$C7#0$C&F#$Po$LM$\pC$DK<$Q5`B#=$
#
123#$%45%&6#'%&7(#%9H%IJ&%@YZ%@-,%N)0#%
&!7#$%B)K#%NT&%Q,Be#$%
b
em
R ^`aZ_
G)[)%'"#%Qf#%N97%4*&%@YZ%&'9H%
@-,%N)0#%42u@%B)K#%NT&%%
s
Q
%^`aZ_
l,Be#$%&)#'%l,Be#$%&'23#$%;<%&'e%
gcE%
gEE%
ghE%
gkD%
gFD%
giD%
cDD%
ghE%
gFE%
cDD%
cdD%
cgD%
ccE%
chE%
ggE%
gED%
ghE%
gkD%
gFE%
cDD%
cdE%
Ch"ơng 4 - kết cấu thép !z
!z
4.2. Tính toán các cấu kiện kết cấu thép
4.2.1. Cấu kiện chịu uốn
- Kiểm tra độ bền '`O#'()#76_/#'*\)#)B/#&J4/0#RZ&#R]&#,*ẳ/0#'*G/*#E1F'#&6%/#
*P/*#&*H4#'A/0#&*V'#dO)S#
# R
W
M
min
th
Ê=s #############
c
b
R
J
QS
Ê
d
=t ########################=hC3D#
&J4/0#EQS#
M-#Q#T#RARH/#)B/#&G/*#&42/#WP#3<'#'ắ&#&G/*#&42/j#
R6/
&*
W#T#RAE)/#'*B/0#)B/#/*ỏ#/*(&#'`O#&6%&#;6_/#EB6#WK6#&Jn'#&J)/0#*Oj#
f#T#RARH/#&ĩ/*#'`O#,*~/#&J1F&#'`O#&6%&#;6_/#/0):@/#EB6#WK6#&Jn'#&J)/0#*Oj#
J#T#RARH/#r)2/#&G/*#'`O#&6%&#;6_/#/0):@/#EB6#WK6#&Jn'#&J)/0#*Oj#
d
?
#T#'*6X)#;P:#?a/#?n/0#;~RC#
g-#g
'
#T#'1Y/0#EZ#&G/*#&42/#'*\)#)B/#WP#'*\)#'ắ&#'`O#&*+,-#3(:#&*H4#?a/0#hT -#hT3-##
#####hTh#,*a6#/*9/#WK6#*_#dB#E6X)#76_/#3PR#W6_'#
g
-#3(:#&*H4#?a/0#hT""C#
#
3#=$>?@@,$24$%i$6!o5$[!4#$`1\$P!4D$
g
{7")%@-,%N)0#%
y0%+=%g%
%8%sLI%QS#$%4J@%;<%@(@%&'Z#'%@'m,%#9#%&!7#$%\<#%@YZ%+<#%#'ữ#$%H'ò#$%B[#G%
%8%15&%@YZ%@(@%#'<%@e#$%@5#$%;<%@YZ%&'(H%#2[@G%
%8%1(@%&'Z#'%QS#$%@'m,%#9#%&)T&%\)0#%@'ữ% %$'9H%Qv#$%'Z)%&'9H%$q@%@YZ%\<#%I()%;<%\<#%4ỡ%%
%
%%%%%%%%%%%+<#%N')%45%In#'%B[#%'w#%'7J@%Qv#$%hDG%
%8%sLI%QS#$%4J@%N')%&6#'%&7(#%R#%4m#'%&R#$%&'tG%
%8% 'Z#'%@V#$:%&'Z#'%N97:%&'Z#'%&!P7:%&'Z#'%#P7%42u@%B<I%&ừ%&'9H%@(#G%
%8%1(@%@-,%N)0#%@YZ%NT&%@-,%&'Z#'%ở%I()%;<%+<#G%
%8%1(@%&'Z#'%@'m,%#9#%BLI%Qv#$%I5&%&'9H%$q@%42u@%B)K#%NT&%&!K#%I5&%@(#'G%
D:i%
D:iE%
%
D:FD%
D:iE%
D:iD%
D:iE%
D:kE%
#
Chú thíchS#t2'#*_#dB#g#<#"#7*6#&G/*#&42/#7*A/0#8+&#'|/0#RZú'C#
#
ã#$6^R#&JO#EZ#?X/#&56#R]&#'ắ&#'Q#RARH/#WP#3<'#'ắ&#EX)#7*2#3K/#&*H4#V/0#d)(&#
&1I/0#E1I/0S#
#
&;""
3"-"yg
s=s+tÊ ##############################=hChD#
WK6S#
#
"
""
M
:
J
s= ####WP#####
"'
"
?
Qf
J
t=
d
#########################=hCyD#
!8# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
&J4/0#EQS#
M
"
-#Q
"
#T#RARH/#)B/#WP#3<'#'ắ&#&G/*#&42/#&56#&6%&#;6_/#76^R#&JOj#
J#T#RARH/#r)2/#&G/*#'`O#&6%&#;6_/#EB6#WK6#&Jn'#&J)/0#*4Pj#
f
'
#T#RARH/#&ĩ/*#'`O#?a/#'2/*#&6%&#;6_/#EB6#WK6#&Jn'#&J)/0#*4Pj#
:
"#
T#7*4a/0#'2'*#&ừ#&Jn'#&J)/0#*O#E%/#'*>#&6%,#062,#06uO#?n/0#WP#'2/*#;~RC#
#
ã#$6^R#&JO#EZ#?X/#'`O#?a/#?n/0#;~R#&56#R]&#'ắ&#'Q#E]<'#&p,#&J)/0#'n'#?Z#&*H4#
'A/0#&*V'#dO)#E9:S#
# R15,13
2
11cb
2
cb
2
1td
Êt+ss-s+s=s ################=hC6D#
&J4/0#EQS#
s
"
-#
t
"
#T#E1F'#82'#E\/*#&*H4#'A/0#&*V'#=hCyD#&56#R]&#'ắ&#E]<'#&p,#&J)/0j##
s
'?#
T#V/0#d)(&#'n'#?Z#;4#&a6#&Ji/0#&p,#&J)/0#k#E]&#ở#'2/*#&J@/#'`O#;~R#WP#&56#EQ##
####?a/#?n/0#;~R#7*A/0#'Q#d1Y/#06O#'1Y/0-#E1F'#&G/*#&*H4#'A/0#&*V'S#
#
Z
P
b
cb
d
=s ###############################################=hCzD#
WK6#Z#3P#'*6X)#;P6#r):#1K'#'*\)#&a6#'`O#?a/#?n/0#;~RS#
# Z#e#?#+# ;
"#
&J4/0#EQS#
#######?#T#?X#JZ/0#'*):X/#&a6#&J4/0#&p,#&J)/0#k#3@/#?a/#'2/*#;~Rj#
#######;
"#
T#7*4a/0#'2'*#&ừ#R]&#&J@/#?a/#'2/*#;~R#E%/#'*>#&6%,#062,#06uO#?n/0#WP##
######'2/*#;~R#=*o/*#hT"DC#
#
#
#
2f#0$>?@,$+q$6r$EFD$6G#0$D0!o5$^1!$D0G5$C3!$DK<$Qs#=$^c\$
#
#
- Kiểm tra độ võng#'`O#'()#76_/#'*\)#)B/#;4#&a6#&Ji/0#&6@)#'*)l/#d6/*#JO#7*A/0#
E1F'#W1F&#r)2#062#&J\#EZ#Wõ/0#06K6#*5/#vfwS#
#
[ ]
fL
EJ
M
f
2
x
c
max
c
Êb= ######################################=hC8D#
Ch"ơng 4 - kết cấu thép !{
!{
&J4/0#EQS#
b
#T#*_#dB#,*n#&*)Z'#WP4#&a6#&Ji/0#WP#36@/#7%&#ở#*O6#E~)#;~R-#WK6#;~R#EI/#'*\)##
##&a6#&Ji/0#,*9/#?B#EX)#
b
e#y/h8-#WK6#;~R#EI/#'*\)#&a6#&p,#&J)/0#ở#06uO#/*\,##
##
b
e#"/" j#
'
RO8
MT#RARH/#)B/#3K/#/*(&#;4#&a6#&Ji/0#&6@)#'*)l/#d6/*#JOj#
vfw#T#EZ#Wõ/0#06K6#*5/#'`O#'()#76_/#'*\)#)B/#'*4#ở#?a/0#hT" C#
#
3#=$>?@N,$8J$Pt#=$=!u!$0'#$vwx$DK<$D]5$[!4#$D0G5$5i#$
#
1(@%@-,%N)0#%@YZ%NT&%@-,%5%;õ#$%$)[)%'"#%[f]
%
dG%sLI%@'6#'%&!7#$%@oZ%;Z#}%%
%%%%%%8%1oZ%;Z#%â,%&',]f#%&'23#$%U,]K#%@e#$%&(@%&!7#$%\ò#$%@'n]G%
%%%%%%8%1oZ%;Z#%@'6#'%@YZ%4xH%@e#$%&(@%&!7#$%\ò#$%@'n]G%
%
{AkDD%
{AhDD%
WG%sLI%H'S%&!7#$%@oZ%;Z#%{AWED%
gG%sLI%4ỡ%@L,%&!S@}%
%%%%%%8%1L,%&!S@%@'T%45%B<I%;)0@%#'ẹ:%@L,%&!S@%\ẫ#%45#$%Qv#$%&Z]%
%%%%%%8%1L,%&!S@%@'T%45%B<I%;)0@%;ừZ%
%%%%%%8%1L,%&!S@%@'T%45%B<I%;)0@%#J#$%
%
{AcDD%
{AEDD%
{AhDD%
cG%sLI%+<#%#'<%;<%I()}%
%%%%%%8%sLI%@'6#'%
%%%%%%8%1(@%\LI%N'(@%%%
%
{AcDD%
{AWED%
#
- Kiểm tra ổn định tổng thể của dầm#&6%&#;6_/#'*u#I-#'*\)#)B/#&J4/0#R]&#,*ẳ/0#?a/#
?n/0#;~R#&*H4#'A/0#&*V'#dO)S#
#
;
M
g
W
s=Ê
j
#########################################=hC{D##
&J4/0#EQS#
M#T#RARH/#)B/#3K/#/*(&#&J4/0#;~Rj#
W
#
T#RARH/#'*B/0#)B/#'`O#&6%&#;6_/#/0):@/#'`O#;~R#3(:#EB6#WK6#&*K#/+/#8O#/*(&j#
j
;
#T#*_#dB#06aR#7*a#/b/0#'*\)#3<'#'`O#;~R#7*6#8+&#E%/#7*a#/b/0#R(&#[/#E\/*##
####&[/0#&*^C#
#
ĐB6#WK6#;~R#&6%&#;6_/#'*u#I#'Q#*O6#&Jn'#EB6#8V/0-#E^#82'#E\/*#*_#dB#j
;
#'~/#,*a6#
&G/*#*_#dB#j
"
#&*H4#'A/0#&*V'S#
#
:
"
84
J
*E
JL g
ổử
j=y
ỗữ
ốứ
#####################################=hC"!D#
"!# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
&J4/0#EQS#
y
#T#*_#dB#3(:#&*H4#?a/0#hT"3-#,*n#&*)Z'#WP4#36@/#7%&#'`O#;~R#ở#'2'#0B6#&<O-#WP4####
##;5/0#WP#W\#&JG#&a6#&Ji/0#&2'#;n/0#3@/#;~R#WP#&*OR#dB#
a
C##
#
3#=$>?@X,$24$%i$
y
$6i!$Pu!$^c\$D0y$z$Dl$0<!$CesD$6i!$E;#=$
#
1e#$%&'*@%&6#'%y%N')%&!m%+=%a%
j=%B2u#$%@=%NT&%ở%
@(#'%#9#%&!7#$%
#'mH%
s"#$%&n)%&!r#$%
&(@%\S#$%
|m%&!6%%
4J&%&n)%
D:d%b%a Ê%cD%cD%ba Ê%cDD%
xH%&!,#$%
1(#'%&!K#%
1(#'%\2[)%
y%?%d:kE%+%D:Dia%
y%?%E:DE%+%D:Dia%
y%?%g:g%+%D:DEga - 4,5.10
-5
a
2
%
y%?%h:h%+%D:DEga - 4,5.10
-5
a
2
%
.'e#$%@q%@=%NT&%
a'â#%Q=%4f,%
1(#'%&!K#%
1(#'%\2[)%
y%?%d:h%+%D:DFa%
y%?%E:DE%+%D:Dia%
y%?%g:dE%+%D:Dca - 2,7.10
-5
a
2
%
y%?%E:gE%+%D:Dca - 2,7.10
-5
a
2
%
1q%W%'7J@%#')f,%
@=%NT&%^*_%
l-&%Nỳ%l-&%Nỳ%
y%?%W:WE%+%D:Dka% y%?%g:h%+%D:Dca - 3,5.10
-5
a
2
%
xH%&!,#$%ở%
$)ữZ%#'mH%
l-&%Nỳ%
y%?%d:kEy
d%
y%?%d:kEy
d%
xH%&!,#$%ở%
dAc%#'mH%
1(#'%&!K#%
1(#'%\2[)%
y%?%d:dcy
d
%
y%?%d:hy
d
%
y%?%d:dcy
d
%
y%?%d:hy
d
%
1q%I5&%@=%NT&%
ở%$)ữZ%#'mH%
a'â#%Qồ%4f,%
1(#'%&!K#%
1(#'%\2[)%
y%?%d:dcy
d
%
y%?%d:gy
d
%
y%?%d:dcy
d
%
y%?%d:gy
d
%
#
Chú thíchS##
#########T#LJ\#dB#y
"
#3(:#?q/0#y#7*6#'2/*#/+/#'`O#;~R#'Q#&ừ#*O6#'B#7%&#&Jở#3@/#&J4/0#/*\,C#
#########T#=*D#t2'#E6^R#'B#7%&#'*6O#/*\,#&*P/*#/*u/0#,*~/#?q/0#/*O)C##
#
xK6#;~R#'*u#I#&*o#&*OR#dB#a#E1F'#&G/*#&*H4#'A/0#&*V'S#
#
74
:
JL
"-yh
J *
ổử
a=
ỗữ
ốứ
##########################################=hC""D#
&J4/0#EQS#
J
8
#T#RARH/#r)2/#&G/*#EB6#WK6#&Jn'#8-#3P#&Jn'#W)A/0#0Q'#WK6#R]&#,*ẳ/0#)B/##
###'`O#;~Rj#
J
:
#T#RARH/#r)2/#&G/*#EB6#WK6#&Jn'#:-#3P#&Jn'#/qR#&J4/0#R]&#,*ẳ/0#?a/#?n/0##
###'`O#;~Rj#
*
#
T#'*6X)#'O4#'`O#&6%&#;6_/#;~Rj#
L
4
#T#'*6X)#;P6#&G/*#&42/#'`O#;~R#ở#/04P6#R]&#,*ẳ/0#)B/#3P#7*4a/0#'2'*#06uO#*O6##
###E6^R#'B#7%&#'2/*#'*\)#/+/#7*A/0#'*4#'*):^/#W\#/0O/0#=7*6#7*A/0#'Q#*_##
###06q/0#L
4#
e#LDj#
Ch"ơng 4 - kết cấu thép ""
""
J
7
#T#RARH/#r)2/#&G/*#84ắ/-#WK6#&*+,#'*u#I#E\/*#*o/*#'Q#&*^#3(:#&*H4#?a/0#hT"h-##
##WK6#;~R#'*u#I#3P#;~R#*P/#&[#*F,-#E1F'#0*+,#?q/0#?O#&(R#&*+,#WP#'Q#*O6#&Jn'##
##EB6#8V/0#&*o#J
7
#E1F'#82'#E\/*#&*H4#'A/0#&*V'S##
# )hb2(
3
3,1
J
3
bb
3
cck
d+d= ###############################=hC" D#
U%)#j
"
#Ê#!-8y-#3(: j
;#
e#j
"
j#'/#/%)#j
"
#>#!-8y-#3(: j
;#
e#!-68#+#!- "#j
"#
Ê#"C#
$*A/0#'~/#76^R#&JO#[/#E\/*#&[/0#&*^#'`O#;~R#7*6#&a6#&Ji/0#&J):X/#r)O#dP/#E]'#
'V/0-#&<O#36@/#&n'#3@/#'2/*#'*\)#/+/#'`O#;~R#WP#36@/#7%&#'*]&#WK6#;~R#=L
4#
e#!DC#
#
3#=$>?@>,$hB\{#$|5F#$C7#0$E&n#$}
[
$DK<$C!aC$^!4#$C0LM$0f#0$D0y$z$
$$$$$$$$$$$$$$$$$$$$RC0{&$
G
~A-$mNXW?UNY$
#
Ip
7%
J
N
^@I
c
_% Ip
7%
J
N
^@I
c
_% Ip
7%
J
N
^@I
c
_% Ip
7%
J
N
^@I
c
_%
dD%
dW%
dc%
dh%
dF%
dFZ%
W:WF%
W:FF%
g:Ei%
c:ch%
E:hD%
h:Ec%
WD%
WDZ%
WW%
WWZ%
Wc%
WcZ%
h:iW%
k:ic%
F:hD%
i:kk%
dd:d%
dW:F%
Wk%
WkZ%
gD%
gDZ%
gg%
gh%
dg:h%
dh:k%
dk:c%
WD:g%
Wg:F%
gd:c%
cD%
cE%
ED%
EE%
hD%
%
cD:h%
Ec:k%
kE:c%
dDD%
dgE%
%
#
T#Kiểm tra độ bền các cấu kiện chịu uốn#&J4/0#*O6#R]&#,*ẳ/0#'*G/*#&*H4#'A/0#&*V'S#
#
:
8
&*&*
8:
M
M
:8g
JJ
Ê
##################################=hC"3D#
&J4/0#EQS#
M
8
-#M
:
#T#RARH/#)B/#EB6#WK6#*O6#&Jn'#'*G/*#8-#:j#
&*&*
8:
J-J
#T#RARH/#r)2/#&G/*#'`O#&6%&#;6_/#&*)#*ẹ,#3~/#31F&#EB6#WK6#*O6#&Jn'#'*G/*#8-#:j#
8-#:#T#&45#EZ#'`O#E6^R#76^R#&JO#EB6#WK6#'2'#&Jn'#'*G/*#8-#:C#
#
- Kiểm tra ứng suất tDơng đDơng trong bản bụng của dầm#ở#*O6#R]&#,*ẳ/0#)B/#
'*G/*#'./0#E1F'#&6%/#*P/*#&*H4#'2'#'A/0#&*V'#=hChD#WP#=hC6DC#
- Kiểm tra ổn định cục bộ của bản cánh dầm:
Đ6X)#76_/#E^#?a/#'2/*#;~R#'*\)#/+/#7*A/0#?\#R(&#[/#E\/*#'n'#?ZS#
#
4
'
?
E
!-y
g
Ê
d
#########################################=hC"hD#
WK6#;~R#'*u#I#*P/#&*o#?
4
#3P#7*4a/0#'2'*#&ừ#?6@/#'`O#?a/#?n/0#&K6#R+,#'`O#?a/#'2/*C#
" # ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
- Kiểm tra ổn định cục bộ của bản bụng dầm:
Ba/#?n/0#'`O#;~R#'~/#06O#'1Y/0#?q/0#'2'#d1Y/#/0O/0#=EV/0D#/%)#062#&J\#EZ#Ra/*#
r):#1K'#'`O#?a/#?n/0# 2,3
E
R
h
b
o
b
>
d
=l #7*6#7*A/0#'Q#&a6#&Ji/0#;6#EZ/0#WP#
b
l ># - #
7*6#'Q#&a6#&Ji/0#;6#EZ/0#&J@/#'2/*#;~RC#$*4a/0#'2'*#O#06uO#'2'#d1Y/#/0O/0#7*A/0#E1F'#
W1F&#r)2# *
4
#7*6#
b
l >#3- #WP# -y*
4
#7*6#
b
l Ê#3- j#*
4
#3P#'*6X)#'O4#&G/*#&42/#'`O#?a/#?n/0#
;~RC#$G'*#&*1K'#'2'#d1Y/#/0O/0#3(:#/*1#dO)S#?X#JZ/0#,*~/#/*A#JO#'`O#'2'#d1Y/#/0O/0#
7*6#?B#&JG#'],#d1Y/#EB6#8V/0#?
d
#
30
h
0
+h!RR-#'*6X)#;P:#'`O#d1Y/#d
d
# ?
d
E/R C#t~/#
,*a6#E]&#'2'#d1Y/#/0O/0#&56#0B6#&<O#WP#&56#W\#&JG#E]&#&a6#&Ji/0#&p,#&J)/0#'Q#062#&J\#3K/#=*o/*#hT DC##
#
#
#
#
2f#0$>?N,$ s#=$^c\$6HZD$=!<$DHI#=$Q#=$DFD$%HI#$#=<#=$
#
#
$6^R#&JO#[/#E\/*#'n'#?Z#'2'#A#?a/#?n/0#;~R#'Q#&6%&#;6_/#EB6#8V/0-#7*6#'*ỉ#E1F'#
06O#'1Y/0#?q/0#'2'#d1Y/#/0O/0#WP#EZ#Ra/*#r):#1K'#'`O#?a/#?n/0#
b
l Ê#6-#'~/#E1F'#&6%/#
*P/*#&*H4#'2'#'A/0#&*V'#dO)S##
a. Khi không có lực tập trung (ứng suất cục bộ
s
cb
=0):
#
44
ổửổử
st
+Êg
ỗữỗữ
st
ốứốứ
##=hC"yD#
&J4/0#EQS#
g#T#*_#dB#E6X)#76_/#3PR#W6_'-#3(:#&*H4#?a/0#hT""j#
s
4
#T#V/0#d)(&#,*2,#&K6#*5/#E1F'#82'#E\/*#&*H4#'A/0#&*V'#dO)S##
############################
4
4
?
'g
s=
l
###=hC"6D#
'
4
#T#*_#dB-#EB6#WK6#;~R#*P/#3(:#&*H4#?a/0#hT"y#,*n#&*)Z'#WP4#*_#dB#&S#
#
3
''
4?
?
&
*
ổử
d
=b
ỗữ
d
ốứ
##=hC"zD#
Ch"ơng 4 - kết cấu thép "3
"3
&J4/0#EQS#
?
'
-#d
'
#T#'*6X)#JZ/0#WP#'*6X)#;P:#'`O#?a/#'2/*#'*\)#/+/j
b#T#*_#dB#3(:#&*H4#?a/0#hT"6C#
#
3#=$>?@T,$*!F$CeG$04$%i$D
&$
&%D:F%d:D%W:D%c:D%h:D%dD:D%gD%
@
7%
gD:D%gd:E%gg:g%gc:h%gc:F%gE:d%gE:E%
#
3#=$>?@j,$*!F$CeG$04$%i$
b
sLI%)f,%N)0#%B<I%;)0@%@YZ%@(#'%@'m,%#9#%
y0%+=%b%
1L,%&!S@%
8%>Z]%42u@%'<#%;<7%@(#'%#9#%
8%>Z]%42u@%'<#%;<7%@(#'%#9#%
W%
Ơ%
1(@%\LI%N'(@%
8%.')%@q%+<#%@*#$%4J&%B)K#%&S%&!K#%@(#'%#9#%
8% !7#$%&!23#$%'uH%N'(@%
Ơ%
D:F%
Chú thích}%=)%;[)%\LI%@L,%&!S@%N')%@q%Bự@%&xH%&!,#$%4J&%ở%@(#'%@'m,%N97:%B-]%b?D:FG%
#
t
4#
T#V/0#d)(&#&6%,#&K6#*5/#E1F'#82'#E\/*#&*H4#'A/0#&*V'#dO)S#
#
'
4
4?
g
!-z6
"!- 3 "
ổử
t=+
ỗữ
ỗữ
m
ốứ
l
#=hC"8D#
&J4/0#EQS
#
4?
?
;g
E
l=
d
#=hC"{D#
;#T#'5/*#/*ỏ#'`O#A#?a/#?n/0#=*
4
#*4]'#ODj#
m#T#&ỷ#dB#06uO#'5/*#3K/#&J@/#'5/*#/*ỏ#'`O#A#?a/#?n/0j#
s, t#T#V/0#d)(&#/+/#ở#?6@/#WP#V/0#d)(&#&6%,#&J)/0#?o/*#'`O#A#?a/#?n/0#76^R##
####################&JO-#E1F'#&G/*#&*H4#'2'#'A/0#&*V'#dO)S#
####
8
M
:
J
s= #########
??
Q
*
t=
d
#=hC !D#
&J4/0#EQS#
:#T#7*4a/0#'2'*#&ừ#&Jn'#&J)/0#*4P#E%/#&*K#'*\)#/+/#8O#/*(&#'`O#?a/#?n/0j#
*
?
#T#'*6X)#'O4#&4P/#?Z#'`O#?a/#?n/0j#
M#WP#Q#T#062#&J\#&J)/0#?o/*#&1I/0#V/0#'`O#RARH/#WP#3<'#'ắ&#&J4/0#,*5R#W6##
##########################'`O#A-#/%)#'*6X)#;P6#'`O#A#3K/#*I/#'*6X)#'O4#&G/*#&42/#*
4
#'`O#/Q##
##########################&*o# M#WP#Q#E1F'#&G/*#'*4#,*~/#A#'*\)#3<'#3K/#*I/#'Q#'*6X)#;P6##
##########################?q/0#'*6X)#'O4#*
4
#'`O#AC#U%)#&J4/0#,*5R#W6#'`O#A#RARH/#WP#3<'##
##########################'ắ&#E[6#;()#&*o#062#&J\#&J)/0#?o/*#'`O#'*ú/0#E1F'#&G/*#&J@/#,*~/#'Q###
##########################;()#7*A/0#E[6C#
"h# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
b. TrDờng hợp có lực tập trung (ứng suất cục bộ
s
cb
ạ
0):
#
'?
4'?-44
ổử
ổử
s
st
++Êg
ỗữ
ỗữ
ỗữ
sst
ốứ
ốứ
#=hC "D#
&J4/0#EQS#
g#T#*_#dB#E6X)#76_/#3PR#W6_'-#3(:#&*H4#?a/0#hT""j#
s-#t-#t
4
#T#82'#E\/*#/*1#&J4/0#'A/0#&*V'#=hC"yDj#
s
'?
#T#82'#E\/*#&*H4#'A/0#&*V'#=hCzDj#
s
4
-#s
'?-4
#T#E1F'#82'#E\/*#/*1#dO)S#
ã#U%)#O/*
4#
Ê#!-8#&*o#s
4
#82'#E\/*#&*H4#'A/0#&*V'#=hC"6D-#'/#s
'?-4
#82'#E\/*#&*H4#'A/0#
&*V'S#
#
"
'?-4
O
'g
s=
l
#=hC D#
##############WK6#########
O
?
Og
E
l=
d
##=hC 3D#
'/#'
"
#3P#*_#dB-#EB6#WK6#;~R#*P/#3(:#&*H4#?a/0#hT"z-#,*n#&*)Z'#WP4#&ỉ#dB#O/*
4#
WP#062#&J\#
'`O#R'#E\/*#&*H4#'A/0#&*V'#=hC"zDC#
ã# U%)#O/*
4#
>#!-8#WP#&ỉ#dB#s
'?
/s#3K/#*I/#062#&J\#vs
'?
/s]#&J4/0#?a/0#hT"8-#&*o#s
4
#82'#
E\/*#&*H4#'A/0#&*V'#dO)S#
#
4
?
'g
s=
l
##=hC hD#
&J4/0#EQ#'
#3P#*_#dB#3(:#&*H4#?a/0#hT"{-#'/#s
'?-4
#&G/*#&*H4#'A/0#&*V'#=hC D#&J4/0#EQ#/%)#
O/*
4
> #&*o#3(:#O#e# *
4
C#
ã#U%)#O/*
4#
>#!-8#WP#&ỉ#dB#s
'?
/s#7*A/0#3K/#*I/#062#&J\#vs
'?
/sw#&J4/0#?a/0#hT"z-#&*o#s
4
#
82'#E\/*#&*H4#'A/0#&*V'#=hC"6D#WP# s
'?-4
#82'#E\/*#&*H4#'A/0#&*V'#=hC D#/*1/0#&*O:#O#
?q/0#O/ #'a#&J4/0#'A/0#&*V'#&G/*#
a
l 'a#7*6#&JO#?a/0#hT"z#E^#&oR#*_#dB#'
"
C#
3#=$>?@U,$*!F$CeG$04$%i$D
@
$6i!$Pu!$^c\$01#
G)(%&!m%@YZ%@
d
%4=)%;[)%\LI%'<#%N')%ZA'
7
%Qv#$%
&%
Ê%D:E%
D:h%D:F%d:D%d:W%d:c%d:h%d:F%
%W:D%
Êd%
W%
c%
h%
dD%
%gD%
dd:E%
dW:D%
dW:g%
dW:c%
dW:c%
dW:E%
dW:c%
dg:D%
dg:g%
dg:E%
dg:h%
dg:k%
dc:F%
dh:d%
dh:h%
dh:F%
dh:i%
dk:D%
dF:D%
WD:c%
Wd:h%
WW:d%
WW:E%
WW:i%
WW:d%
WE:k%
WF:d%
Wi:d%
gD:D%
gd:D%
Wk:d%
gW:d%
gh:g%
gF:g%
gi:k%
cd:h%
gW:h%
gi:W%
cE:W%
cF:k%
Ed:D%
Eg:F%
gF:i%
ch:E%
Ec:i%
Ei:c%
hg:g%
hF:W%
cE:h%
Ek:k%
hE:d%
kD:c%
kh:E%
Fg:h%
Ch"ơng 4 - kết cấu thép "y
"y
U%)#/04P6#'2'#d1Y/#/0O/0#'/#E]&#'2'#d1Y/#;i'#E^#06O#'1Y/0#?a/#?n/0#;~R-#&*o#
'~/#76^R#&JO#[/#E\/*#'2'#A#?a/#?n/0#;~R#&*H4#'2'#'A/0#&*V'#J6@/0#'*4#&J4/0#&6@)#'*)l/#
&*6%%#7%&#'()#&*+,#*6_/#*P/*C#
#
3#=$>?@m,$*!F$CeG$=!u!$0'#$DK<$Cỉ$%i$v
s
DQ
/
s]
G)(%&!m%$)[)%'"#%@YZ%&ỉ%+=%[s
@Q
As]%N')%ZA'
7
%Qv#$%
{7")%\LI%&%
D:F%D:i%d:D%d:W%d:c%d:h%d:F%
W:D%
sLI%'<#%
Êd%
W%
c%
h%
dD%
%gD%
D%
D%
D%
D%
D%
D%
D:dch%
D:dDi%
D:DkW%
D:Dhh%
D:DEi%
D:Dck%
D:dFg%
D:dhi%
D:dWi%
D:dWk%
D:dWW%
D:ddW%
D:Whk%
D:Wkk%
D:WFd%
D:WFF%
D:Wih%
D:gDD%
D:gEi%
D:cDh%
D:cki%
D:Egh%
D:Ekc%
D:hgg%
D:ccE%
D:Ecg%
D:kdd%
D:Fkc%
d:DDW%
d:WFg%
D:EcD%
D:hEW%
D:igD%
d:diW%
d:Egi%
W:Wci%
D:hdF%
D:kii%
d:dgW%
d:chF%
W:dEc%
g:igi%
#
3#=$>?@W,$*!F$CeG$04$%i$D
N
$
ZA'
D%
Ê%D:F
D:i%d:D%d:W%d:c%d:h%d:F%
%W:D%
@
W%
gD:D
%
gk:D%gi:W%cE:W%EW:F%hW:W%kW:h%Fc:k%
#
#
4.2.2. Cấu kiện chịu kéo đúng tâm và chịu nén đúng tâm
4.2.2.1. Tính toán độ bền
$6^R#&JO#EZ#?X/#'2'#'()#76_/#'*\)#7+4#*4]'#'*\)#/+/#Eú/0#&9R#&*H4#'A/0#&*V'#dO)S#
#
&*
U
g
F
s=Ê
#=hC yD#
&J4/0#EQS#
U#T#3<'#;i'#&G/*#&42/j#
F
&*
#T#;6_/#&G'*#&6%&#;6_/#&*)#*ẹ,#'`O#'()#76_/j#
g#T#'1Y/0#EZ#&G/*#&42/#7*6#'*\)#7+4#*4]'#'*\)#/+/#'`O#&*+,-#3(:#&*H4#?a/0#hT"C#
#
4.2.2.2. Tính toán ổn định tổng thể
$6^R#&JO#[/#E\/*#&[/0#&*^#'2'#'()#76_/#'*\)#/+/#Eú/0#&9R#&*H4#'A/0#&*V'#dO)S#
#
U
g
F
s=Ê
j
#=hC 6D#
&J4/0#EQS#
F#T#;6_/#&G'*#&6%&#;6_/#/0):@/#'`O#'()#76_/j#
j#T#*_#dB#)B/#;i'#E1F'#&G/*#&*H4#'A/0#&*V'#=hC zD#'*4#ở#?a/0#hT !-#,*n##
################&*)Z'#WP4#EZ#Ra/*#r):#1K'#
l
#*4]'#&JO#ở#?a/0#hT "-#,*n#&*)Z'#WP4#EZ##
################Ra/*#l WP#'1Y/0#EZ#&G/*#&42/#gC#
"6# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
3#=$>?NV,$24$%i$5i#$^ọD$
j
DK<$D]5$[!4#$D0G5$#L#$Ce5#=$Câ\$
.')%
1e#$%&'*@%&6#'%'0%+=%,=#%\r@%j %
D Êl< W:E%
g
"=!-!z3 y-y3 D
E
j= ll
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%^cGWkZ_%
W:E Êl< c:E%
ggg
"-hz"3 =!-3z" z- 3 D=!-! zyy-y3D
EEE
j= l+-l
%%%^cGWkQ_%
l
%>%c:E%
33
=y"D
j=
l-l
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%^cGWk@_%%
Chú thích:%5%In#'%z,]%2[@%
l
%U(@%4m#'%&'P7%@e#$%&'*@%^cGWF_%
#
3#=$>?N@,$24$%i$5i#$^ọD$
j
DK<$D]5$[!4#$D0G5$#L#$6ú#=$Câ\$
y0%+=%j%4=)%;[)%@(@%@-,%N)0#%Qv#$%&'9H%@q%@23#$%45%&6#'%&7(#%>%^`aZ_%
5%In#'%
l%
WDD%WcD%WFD%gWD%ghD%cDD%ccD%cFD%EWD%EhD%
dD%
WD%
gD%
cD%
ED%
hD%
kD%
FD%
iD%
dDD%
ddD%
dWD%
dgD%
dcD%
dED%
dhD%
dkD%
dFD%
diD%
WDD%
WdD%
WWD%
iFF%
ihk%
igi%
iDh%
Fhi%
FWk%
kFW%
kgc%
hhE%
Eii%
Egk%
cki%
cWc%
gkh%
gWF%
WiD%
WEi%
Wgg%
WdD%
did%
dkc%
dhD%
iFk%
ihW%
igd%
Fic%
FEW%
FDE%
kEc%
hFh%
hdW%
EcW%
ckF%
cdi%
ghc%
gdE%
Wkh%
Wcc%
WkF%
dih%
dkk%
dhd%
dck%
dgE%
iFE%
iEi%
iWc%
FFg%
Fgh%
kFE%
kWc%
hcd%
EhE%
ciE%
cWk%
ghh%
gdg%
WkW%
Wgi%
WdW%
dFi%
dkD%
dEc%
dcD%
dWF%
ddk%
iFc%
iEE%
idk%
Fkg%
FWW%
khh%
hFk%
hDW%
EWW%
ccF%
gFd%
gWd%
Wkh%
WcD%
Wdd%
dFk%
dhk%
dED%
dgh%
dWc%
ddg%
dDc%
iFg%
iEW%
idd%
Fhg%
FDi%
kci%
hEc%
Ehh%
cFg%
cDF%
ggF%
WFk%
Wck%
WdE%
dFi%
dhk%
dED%
dgE%
dWW%
ddd%
dDW%
Dic%
iFW%
ici%
iDE%
FEc%
kih%
kWd%
hWg%
EgW%
cck%
ghi%
gDh%
WhD%
WWg%
diE%
dkd%
dEW%
dgh%
dWg%
ddd%
dDd%
Dig%
DFh%
iFd%
ich%
iDD%
Fch%
kFE%
hih%
EiE%
EDd%
cdg%
ggE%
WFD%
Wgk%
WDc%
dkF%
dEk%
dgi%
dWE%
ddW%
dDW%
Dig%
DFE%
Dkk%
iFD%
icg%
FiE%
Fgi%
kkE%
hkW%
EhF%
ckd%
gFD%
gDi%
WEF%
Wdi%
dFi%
dhc%
dcE%
dWi%
ddE%
dDc%
Dic%
DFh%
Dki%
Dkg%
iki%
icd%
Fid%
FgW%
khc%
hED%
EcW%
ccW%
gci%
WFh%
Wgi%
WDg%
dkE%
dEg%
dgc%
dWD%
dDk%
Dik%
DFF%
DFD%
Dkc%
DhF%
ikF%
igF%
FkF%
FWE%
kch%
hWF%
EdF%
cdc%
gWh%
Whk%
WWg%
diD%
dhg%
dcg%
dWh%
ddW%
dDD%
Did%
DFW%
DkE%
Dhi%
Dhc%
Chú thích:%G)(%&!m%j%&!7#$%Qn#$%4ã%42u@%&V#$%BK#%dDDD%BL#%
#
Ch"¬ng 4 - kÕt cÊu thÐp "z
"z
§Z#Ra/*#l #WP#EZ#Ra/*#r):#1K'#
l
#'`O#'()#76_/#E1F'#82'#E\/*#&*H4#'A/0#&*V'#dO)S#
#
4
L
J
l= ###WP####
g
E
l=l
#=hC 8D#
&J4/0#EQS#
J#T#?2/#&G/*#r)2/#&G/*#'`O#&6%&#;6_/j#
g-#E#T#'1Y/0#EZ#&G/*#&42/#WP#RAE)/#EP/#*s6#'`O#&*+,C##
#
t*6X)#;P6#&G/*#&42/#L
4
#'`O#'()#76_/#'Q#&6%&#;6_/#7*A/0#E[6#&*H4#'*6X)#;P6#&*O/*#
E1F'#82'#E\/*#&*H4#'A/0#&*V'S#
# L
4
#e#
m
L#=hC {D#
&J4/0#EQS#
m T#*_#dB#'*6X)#;P6#&G/*#&42/-#,*n#&*)Z'#WP4#36@/#7%&#ë#*O6#E~)#'()#76_/-#8HR##
###############?a/0#hT "j#
L#T#'*6X)#;P6#'`O#'()#76_/C#
#
3#=$>?NN,$24$%i$
m
6i!$Pu!$DJC$Dl$\pC$DnC$[0B#=$6æ!$
%%%%jw%4å%B)K#%NT&%ë%'Z)%4L,%@5&%;<%&n)%&!r#$%
m%?%W% m%?%d:dW% m%?%d m%?%DGkWE m%?%D:k m%?%D:E
#
§B6#WK6#'Z&#&J4/0#7*)/0#RZ&#&~/0#RZ&#/*\,#'*9/#7*)/0#36@/#7%*K,#*4]'#/0PR-#
7*6#;~R#36@/#7%&#'V/0#WK6#'Z&#WP#&a6#&Ji/0#&2'#;n/0#&56#'2'#/ó*)/0#&*o#*_#dB#'*6X)#;P6#
&G/*#&42/#m E1F'#82'#E\/*#&*H4#'A/0#&*V'#=hC3"D#WP#=hC3 D-#,*n#&*)Z'#WP4#&û#dB#06uO#EZ#
'V/0#&1I/0#EB6#'`O#;~R#WP#'Z&#&G/*#&*H4#'A/0#&*V'#dO)S#
#
;;'
';'
6JL
7
6LJ
==´#=hC3!D#
&J4/0#EQS#
J
h
-#J
'
#T#RARH/#r)2/#&G/*#'`O#&6%&#;6_/#;~R#WP#'`O#'Z&#EB6#WK6#&Jn'#W)A/0#0Q'##
####################WK6#R]&#,*¼/0#'`O#7*)/0j#
L
h
-#L
'
#T#'*6X)#;P6#;~R#WP#'*6X)#'O4#'Z&#&J4/0#7*)/0C#
"8# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
#
T#$*6#'Z$@/#7%*K,#WK6#RQ/0S#
#
!- 38
"
7
m=+
#=hC3"D#
T#$*6#'Z$@/#7%&#/0PR#WK6#RQ/0S#
#
7!-y6
7!-"h
+
m=
+
#=hC3 D#
ĐB6#WK6#'Z&#'Q#R]&#'ắ&#&*O:#E[6#&*o#'*6X)#;P6#&G/*#&42/#E1F'#82'#E\/*#&*H4#'A/0#&*V'S#
# L
4
#e#
m
o
m
L#=hC33D#
&J4/0#EQ#m
o
3P#*_#dB#*6_)#'*ỉ/*#'*6X)#;P6#&G/*#&42/#7*6#'Z&#'Q#R]&#'ắ&#&*O:#E[6-#E1F'#82'#
E\/*#&*H4#?a/0#hT 3C#
#
3#=$>?NX,$24$%i$0!45$D0ỉ#0$D0!o5$^1!$C7#0$C&F#$
m
o
$6i!$Pu!$DJC$Dl$C!aC$^!4#$
$$$$$$$$$$$$$$$$$$$C0<g$6ổ!$C0{&$D0!o5$D<&$
ỷ%+=%J
I)#
AJ
IZU%
jw%4ồ%&'Z#'%
Q,]%B,x&%
%
Q)T#%4R)%
%
@YZ%J%
"
L
L
%
D:Dd
%
D:d
%
D:W
%
DGc
%
DGh
%
D:F
%
d:D
%
%
%
%
lx@%#'-&
%
D:D%
D:W%
D:c%
D:h%
D:F%
D:D%
D:W%
D:c%
D:h%
D:F
%
d:Wg
%
d:dc
%
dGDk
%
d:DW
%
d:DD
%
d:di
%
d:dd
%
d:DE
%
d:Dd
%
d:DD
%
d:dW
%
d:Dk
%
d:Dc
%
d:Dd
%
d:DD
%
d:Dk
%
d:Dc
%
d:DW
%
d:Dd
%
d:DD
%
d:Dg
%
d:DW
%
d:Dd
%
d:DD
%
d:DD
%
%
%
d:DD
%
%
%
%
%
lx@%#'-&
%
lx@%'Z)%
%
lx@%QZ%
D%
D%
D%
%
d:cE
%
d:hh
%
d:kE
%
d:gE
%
d:cE
%
d:cF
%
d:Wd
%
d:Wc
%
d:WE
%
d:dg
%
d:dg
%
d:dc
%
d:DE
%
d:DE
%
d:Dh
%
d:DD
%
d:DD
%
d:DD
%
Chú thích
}%15&%@q%Qf%\<]%N'e#$%4R)%&'P7%@')f,%@Z7G%
##
ĐB6#WK6#'Z&#'Q#R]&#'ắ&#&*O:#E[6#76^)#?p'#&*O/0#&*o#*_#dB#'*6X)#;P6#&G/*#&42/#E1F'#
82'#E\/*#J6@/0#'*4#&ừ/0#,*~/#'Z&C##
Ch"ơng 4 - kết cấu thép "{
"{
ĐB6#WK6#'2'#'()#76_/#3P#'2'#&*O/*#'`O#;P/#,*ẳ/0#&*o#'*6X)#;P6#&G/*#&42/#L
4
#7*6#&G/*#
WX#[/#E\/*#&J4/0#R]&#,*ẳ/0#;P/#WP#&J4/0#R]&#,*ẳ/0#W)A/0#0Q'#WK6#R]&#,*ẳ/0#;P/#
=/04P6#R]&#,*ẳ/0#;P/D#E1F'#82'#E\/*#&*H4#?a/0#hT hC##
U%)#;i'#&*H4#'*6X)#;P6#'`O#&*O/*#;P/#&G/*#&42/-#'2'#3<'#/+/#'Q#062#&J\#7*2'#/*O)#
=U
"
>#U
D-#&*o#'*6X)#;P6#&G/*#&42/#L
4#
/04P6#R]&#,*ẳ/0#;P/#E1F'#&G/*#&*H4#'A/0#&*V'S#
#
4"
"
U
LL!-zy!- y
U
ổử
=+
ỗữ
ốứ
#=hC3hD#
WP#7*6#&6%/#*P/*#76^R#&JO#[/#E\/*#&*H4#'A/0#&*V'#=hC 6D#'~/#,*a6#3(:#U#e#U
"
C#
#
3#=$>?N>,$A0!o5$^1!$C7#0$C&F#$L
&$
DK<$DFD$C0<#0$^1#$M0ẳ#=$
#
1')f,%\<)%&6#'%&7(#%{
D%
a'2w#$%,=#%\r@%
'Z#'%@(#'%
'Z#'%U)K#%%
;<%&'Z#'%4*#$%ở%$=)%
1(@%&'Z#'%QS#$%
N'(@%
8% !7#$%IJ&%H'ẳ#$%\<#%
8%p$7<)%IJ&%H'ẳ#$%\<#%
{%
{
d%
{%
{
d%
D:F{%
{
d%
Chú thích}%
%%%{%8%@')f,%\<)%'O#'%'r@%@YZ%&'Z#'%$)<#%^N'7n#$%@(@'%$)ữZ%&âI%@(@%IC&%\<#_%&!7#$%IJ&%H'ẳ#$%\<#G%
%%%{
d%
8%N'7n#$%@(@'%$)ữZ%@(@%IC&%42u@%B)K#%NT&%N'e#$%@'7%@',]t#%;m%!Z%#$7<)%IJ&%H'ẳ#$%@YZ%\<#G%
#
ĐB6#WK6#'Z&#J>/0#'Q#'2'#/*2/*#E1F'#/B6#WK6#/*O)#?q/0#'2'#?a/#06q/0#*4]'#'2'#
&*O/*#06q/0#&*o#'*6X)#;P6#&G/*#&42/#'`O#'Z&#EB6#WK6#&Jn'#a4#=&Jn'#&*ẳ/0#0Q'#WK6#R]&#,*ẳ/0#
'`O#?a/#06q/0#*4]'#&*O/*#06q/0D#'~/#,*a6#8+&#&*@R#a/*#*1ở/0#'`O#3<'#'ắ&C#LJ4/0#&J1Y/0#
*F,#/P:#7*6#82'#E\/*#*_#dB#)B/#;i'#j '~/#&*O:#EZ#Ra/*#l#?q/0#EZ#Ra/*#&1I/0#E1I/0#
l
&E
#/%)#dm#;n/0#?a/0#hT "j#&*O:#EZ#Ra/*#r):#1K'#
l
#?q/0#EZ#Ra/*#r):#1K'#&1I/0#
E1I/0#
l
&E
#e l
&E
gE
#/%)#&G/*#&*H4#'A/0#&*V'#=hC zDC##
ĐZ#Ra/*#&1I/0#E1I/0#l
&E
#'`O#&*O/*#J>/0#?a/#06q/0#WP#&*O/*#06q/0#E1F'#&G/*#&*H4#
'2'#'A/0#&*V'#=hC3yD#WP#=hC36D#'*4#&J4/0#?a/0#hT yC##
LJ4/0#/*u/0#'Z&#J>/0#?a/#06q/0#&*o#EZ#Ra/*#l
"
-#l
#'`O#&ừ/0#/*2/*#J6@/0#Jẽ#06uO#
'2'#?a/#06q/0#7*A/0#E1F'#3K/#*I/#h!-#'/#&J4/0#'2'#'Z&#J>/0#&*O/*#06q/0#&*o#EZ#Ra/*#
'`O#'2'#/*2/*#J6@/0#Jẽ#06uO#'2'#Rắ*A/0#E1F'#3K/#*I/#8!#WP#7*A/0#E1F'#W1F&#r)2#EZ#
Ra/*#&1I/0#E1I/0#l
&E
#'`O#&4P/#'Z&C#
#
!# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
3#=$>?NT,$AB#=$C0;D$C7#0$6J$\3#0$CHq#=$6Hq#=$
l
C6$
5%In#'%&2w#$%42w#$%l
&4%
@YZ%&'Z#'%&R%'uH%!ỗ#$%
jw%4ồ%&)T&%\)0#%
|[)%Qn#%$)v#$%N')%#%Ê%D:W%%
|[)%&'Z#'%$)v#$%
%
{7")%&)T&%\)0#%d%
&;
::"
l=l+l
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%^cGgEZ_%
&;
::"
8"
F
F
l=l+a
%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%^cGghZ_%
%
{7")%&)T&%\)0#%W%
&;"
l=l+l+l
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%^cGgEQ_%
"
&;
8"8
F=D
FF
aa
l=l++
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%^cGghQ_%
#
#
###OD##########?D#
#
2f#0$>?X,$AJC$Cổ$0ZM$
OD#tZ&#J>/0#?a/#06q/0j#?D#tZ&#J>/0#&*O/*#06q/0C#
Ch"¬ng 4 - kÕt cÊu thÐp "
"
t2'#7ý#*6_)#&J4/0#'A/0#&*V'S#
l
:
#T#EZ#Ra/*#'`O#&*O/*#EB6#WK6#&Jn'#a4#:T:j#
l
"
-#l
#T#EZ#Ra/*#'`O#&õ/0#/*2/*#EB6#WK6#&Jn'#"T"#WP# T #06uO#*O6#R+,#&J4/0##
#######################'`O#?a/#06q/0#7*6#;|/0#36@/#7%&#*P/#*4]'#06uO#*O6#E6/*#&2/#ë#?6@/j#
F#T#;6_/#&G'*#&6%&#;6_/#'`O#&4P/#&*O/*j#
F
8"
-# F
8
#T#;6_/#&G'*#&6%&#;6_/#'2'#&*O/*#86@/#'`O#*_#06q/0#=7*6#*_#06q/0#'*u##
##########################&*p,#'Q# #&*O/*#86@/D#/qR#&J4/0#R]&#,*¼/0#&*¼/0#0Q'#WK6#'2'#&Jn'###
##########################&1I/0#V/0#"T"#WP# T j#
a
"
-#a
#T#'2'#*_#dB#E1F'#82'#E\/*#&*H4#'A/0#&*V'#a#e#"!O
3
/?
3j#
O-#?-#L#T#7G'*#&*1K'#'Z&#&*O/*#06q/0#8HR#*o/*#hT3j#
/-#/
"
-#/
#T#'2'#*_#dB#E1F'#82'#E\/*#&*H4#'A/0#&*V'#dO)S#
#######################/#e#J
/
?/J
?
3################/
"
#e#J
/"
?
"
/J
?"
3#####################/
#e#J
/
?
/J
?
3#
#######J
/"
-#J
/
#T#RARH/#r)2/#&G/*#'`O#&6%&#;6_/#'2'#/*2/*#EB6#WK6#'2'#&Jn'#&1I/0#V/0##
####################"T"#WP# T #=EB6#WK6#&6%&#;6_/#3456# #'Q# #&Jn'#a4Dj#
##J
?
#T#RARH/#r)2/#&G/*#&6%&#;6_/#'`O#RZ&#?a/#06q/0#EB6#WK6#&Jn'#?a/#&*9/#8T8j#
##J
?"
-#J
? #
T#RARH/#r)2/#&G/*#&6%&#;6_/#'`O#?a/#06q/0-#/qR#&J4/0#'2'#R]&#,*¼/0##
#########################&*¼/0#0Q'#WK6#'2'#&Jn'#&1I/0#V/0#"T"#WP# T #=EB6#WK6#3456#&6%&#;6_/# Dj#
#######?
"
-#?
#T#7*4a/0#'2'*#06uO#'2'#&Jn'#'`O#/*2/*-#/qR#&J4/0#'2'#R]&#,*¼/0#&*¼/0###
############################0Q'#WK6#'2'#&Jn'#&1I/0#V/0#"T"#WP# T #=EB6#WK6#3456#&6%&#;6_/# DC#
#
t2'#&*O/*#06q/0#WP#?a/#06q/0#'`O#'()#76_/#&[#*F,#'*\)#/+/#Eó/0#&9R#E1F'#&G/*#
&42/#'*\)#3<'#'¾&#r):#1K'#Q
4
#'46#/*1#7*A/0#E[6#&J@/#&4P/#'*6X)#;P6#&*O/*#WP#E1F'#82'#
E\/*#&*H4#'A/0#&*V'#dO)#E9:S#
#
6
4
EU
Qz-"y"!= 33!D
g
-
=´-
j
#=hC3zD#
&J4/0#EQS#
U#T#3<'#/+/#&G/*#&42/#&J4/0#'Z&#&[#*F,j#
j T#*_#dB#)B/#;i'#'`O#'Z&#&[#*F,#82'#E\/*#&*H4#l
&E
C#
#
L<'#'¾&#r):#1K'#Q
4
#,*9/#?B#EX)#'*4#'2'#*_#06q/0#&J4/0#'2'#R]&#,*¼/0#d4/0#d4/0#
WK6#/*O)C#Ba/#06q/0#'*\)#3<'#'¾&#L
?
#WP#RARH/#)B/#M
?
#&J4/0#R]&#,*¼/0#'`O#?a/#06q/0#
&G/*#&*H4#'2'#'A/0#&*V'#dO)S#
#
J'
?
QL
L
?
= ###WP##
J'
?
QL
M
= #=hC38D#
&J4/0#EQS#
Q
J
#T#3<'#'¾&#r):#1K'#&2'#;n/0#3@/#RZ&#*_#06q/0#&J4/0#RZ&#R]&#,*¼/0#=/%)##
#################'2'#*_#06q/0#E]&#&J4/0#*O6#R]&#,*¼/0#&*o#Q
J
e#Q
4
/ Dj#
L
'
#T#7*4a/0#'2'*#&J)/0#&9R#06uO#*O6#?a/#06q/0j#
?#T#7*4a/0#'2'*#06uO#'2'#&Jn'#'`O#/*2/*C#
# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
t2'#&*O/*#06q/0#'`O#'Z&#J>/0#'~/#E1F'#&G/*#/*1#'2'#&*O/*#?n/0#'`O#;P/-#3<'#;i'#
&J4/0#&*O/*#?n/0#86@/#E1F'#82'#E\/*#&*H4#'A/0#&*V'#dO)S#
#
J
&8
&
Q
U
/d6/
=
a
#=hC3{D#
&J4/0#EQS#
/
&
#T#dB#&*O/*#06q/0#86@/#ở#RZ&#R]&#*_#06q/0-#WK6#*_#&*O/*#06q/0#*o/*#&OR##
#################062'#/
&
e"-#WK6#*_#&*O/*#06q/0#'*u#&*p,#/
&
#e# j#
#########a#T#0Q'#/0*6@/0#06uO#&*O/*#06q/0#86@/#WP#/*2/*#'Z&C
#
LJ1Y/0#*F,#*_#&*O/*#?n/0#'*u#&*p,#'Q#&*O/*#/0O/0-#3<'#;i'#&J4/0#&*O/*#86@/#'/#
'*\)#&*@R#RZ<'#;i'#,*n#;4#/Q#'|/0#'*\)#/+/#WK6#/*2/*#'Z&-#Wp:#&4P/#?Z#3<'#;i'#
&J4/0#&*O/*#06q/0#86@/#U
&8#
3PS##
#
J8
&8&/
&/
QF
UU
/d6/ F
=+a
a
#=hCh!D#
&J4/0#EQS#
U
/
#T#3<'#;i'#&J4/0#RZ&#/*2/*#'Z&j#
F
/
#T#;6_/#&G'*#&6%&#;6_/#'`O#RZ&#/*2/*j##
F
8
#T#;6_/#&G'*#&6%&#;6_/#'`O#RZ&#&*O/*#86@/j#
a
&
#T#*_#dB#E1F'#82'#E\/*#&*H4#'A/0#&*V'#dO)S#
#
&
33
O3
O ?
a=
+
#=hCh"D#
########O#T#'*6X)#;P6#&*O/*#86@/j
########3#T#7*4a/0#'2'*#06uO#*O6#Rắ&j
########?#T#7*4a/0#'2'*#06uO# #&Jn'#'`O#/*2/*C
t2'#&*O/*#06q/0#86@/#E1F'#&G/*#/*1#RZ&#&*O/*#'*\)#/+/#&J)/0#&9R-#/%)#'Q#d<#3_'*#
&9R#06uO#&*O/*#06q/0#86@/#WP#R]&#,*ẳ/0#36@/#7%&#&*o#3(:#*_#dB#E6X)#76_/#3PR#W6_'#g#e#!-zyC#
ĐZ#Ra/*#'`O#'2'#'()#76_/#'*\)#7+4#WP#'*\)#/+/#7*A/0#E1F'#W1F&#r)2#'2'#062#&J\#
EZ#Ra/*#06K6#*5/#vlw#'*4#&J4/0#?a/0#hT 6C#
3#=$>?Nj,$8J$\3#0$=!u!$0'#$v
l
x$DK<$DFD$D]5$[!4#$D0G5$`bD$^ọD
$
5%I(#'%$)[)%'"#%[l]%
1-,%N)0#%@'m,%N97%N')%&(@%\S#$%
{7")%@-,%N)0#%
1-,%N)0#%%
@'m,%#9#%
n)%&!r#$%45#$% n)%&!r#$%&ĩ#'
%
%8%15&%@'6#'G%
%8%15&%H'S:%@(@%&'Z#'%$)v#$%@YZ%@5&G%
%8%1(@%&'Z#'%$)v#$%N'(@G%
%8%1(@%&'Z#'%@(#':%&'Z#'%4*#$:%&'Z#'%%U)K#%&!,]f#%%
%%%%H'n#%Bự@%$=)%&ựZG%
8%1(@%&'Z#'%N'(@%@YZ%\<#G%
dWD%
dED%
WDD%
%
dWD%
dED%
8%
8%
cDD%
%
WED%
gED%
8%
8%
cDD%
%
cDD%
cDD%
Ch"ơng 4 - kết cấu thép 3
3
4.2.2.3. Tính toán ổn định cục bộ
ĐB6#WK6#'Z&#E1F'#0*+,#&ừ#'2'#&*+,#?a/#*4]'#&ừ#'2'#&*+,#;p,#'~/#?a4#EaR#'Z&#
7*A/0#?\#R(&#[/#E\/*#'n'#?Z#&J1K'#7*6#'Z&#?\#R(&#[/#E\/*#&[/0#&*^C#
T#Đ6X)#76_/#E^#?a/#'2/*#7*A/0#?\#R(&#[/#E\/*#'n'#?Z#7*6#&ỷ#dB#?
4
/d
'#
06uO#'*6X)#
JZ/0#&G/*#&42/#?
4
#'`O#,*~/#/*A#JO#'`O#?a/#'2/*#WP#'*6X)#;P:#d
'#
'`O#?a/#'2/*#7*A/0#
E1F'#3K/#*I/#062#&J\#EZ#Ra/*#06K6#*5/#vl
'
w#'*4 &J4/0#?a/0#hT zS#
#
[ ]
4
'
'
?
Êl
d
#=hCh D#
#
3#=$>?NU,$8J$\3#0$=!u!$0'#$v
l
D
x$DK<$M0c#$#0B$e<$DK<$DF#0$C!aC$^!4#$DJC$
#
J@%4)tI%@YZ%Qn#%@(#'%;<%&)T&%\)0#%
G)(%&!m%45%In#'%$)[)%'"#%[l
@
]
%
N')%D:F%Ê%
l
%Ê%c%
8%1(#'%@YZ%&)T&%\)0#%@'ữ%I%;<%@'ữ% %N'e#$%;)f#G%
[l
@
]%?%^D:gh%+%D:dD
l
_
E/g
%
8%1(#'%@YZ%&'9H%$q@%4f,%@"#'%;<%@(@%&'9H%\xH%N'e#$%;)f#%%
%%%^&!ừ%@'ữ%[_G%
[l
@
]%?%^D:gE%+%D:Dk
l
_
E/g
%
8%1(#'%B[#%@YZ%&'9H%$q@%N'e#$%4f,%@"#'%;<%@(#'%&'9H%@'ữ%[%%
%%%N'e#$%;)f#G%
[l
@
]%?%^D:gF%+%D:DF
l
_
E/g
%
Chú thích}%.')%
l
b%D:F%B-]%
l
?%D:F%;<%N')%
l
>%c%B-]%
l
?%cG%
#
T#Đ6X)#76_/#E^#?a/#?n/0#'Z&#'*\)#/+/#&J)/0#&9R#7*A/0#?\#R(&#[/#E\/*#'n'#?Z#3P#
7*6#&ỷ#dB#*
4
/d
?#
06uO#'*6X)#'O4#&G/*#&42/#*
4
#WP#'*6X)#;P:#d
?#
'`O#?a/#?n/0#7*A/0#E1F'#3K/#
*I/#062#&J\#06K6#*5/#vl
?
w#'*4#&J4/0#?a/0#hT 8S#
#
[ ]
4
?
?
*
Êl
d
#=hCh3D##
ĐB6#WK6#'Z&#&6%&#;6_/#'*u#I-#7*6#7*A/0#&*4a#R/#E6X)#76_/#=hCh3D#'~/#?B#&JG#'2'#'],#
d1Y/#;i'#E]&#ở#06uO#?a/#?n/0-#d1Y/#;i'#,*a6#'Q#7G'*#&*1K'#?
d;#
#"!d
?#
WP#d
d;#
#!-zyd
?
C##
U04P6#JO#7*6#=*
4
/d
?
D## -
E/g
#,*a6#E]&#'2'#d1Y/#/0O/0#'2'*#/*O)#Oe= -yá3D*
4
#
E^#?a/#?n/0#7*A/0#?\#R(&#[/#E\/*#;4#V/0#d)(&#&6%,C#$G'*#&*1K'#'`O#'],#d1Y/#/0O/0#?B#
&JG#EB6#8V/0#r)O#?a/#?n/0#,*a6#'QS##
#?
d/
#
#*
4
/3!#+#h!RR#WP##
d
d/#
# ?
d
E/g
#=hChhD#
h# ########sổ tay KTTL * Phần 1 - cơ sở kỹ thuật thủy lợi * Tập 2
3#=$>?Nm,$8J$\3#0$=!u!$0'#$v
l
Q
x$DK<$Q3#$Qs#=$DJC$6pD$D0G5$#L#$6ú#=$Câ\$
5%In#'%$)[)%'"#%[l
Q
]%N')%45%In#'%z,]%2[@%@YZ%@5&%
yO#'%&'*@%&)T&%\)0#%@5&%
!- 8
lÊ %
!- 8
l> %
8%1'ữ%I%
?
vw E/g
l= %
?
vw=!-36 !-8 D E/g
l=+l %
%%%%%%%%%%%%%%%%%%%%%
-{ E/g
Ê %
8%1'ữ%[:%'O#'%'5H%@'ữ%#'x&%
%^'
7
%B<%@"#'%B[#%@YZ%'O#'%'5H_%
?
vw E/g
l= %
?
vw=!-8y!-"{DE/g
l=+l %
%%%%%%%%%%%%%%%%%%%%%
"- 6E/g
Ê %
8%yO#'%'5H%;,e#$%
?
vw!-{ E/g
l= %
?
vw=!-z6 !-"zDE/g
l=+l %%
%%%%%%%%%%%%%%%%%%%%
"-h E/g
Ê %
#
4.2.3. Cấu kiện chịu tác dụng đồng thời của lực dọc và mômen uốn
4.2.3.1. Tính toán cột đặc chịu nén lệch tâm
- Kiểm tra độ bền của cột đặc chịu nén lệch tâm#7*6#R]&#,*ẳ/0#&2'#;n/0#'`O#
RARH/#)B/#&J|/0#WK6#R]&#,*ẳ/0#EB6#8V/0#'`O#&6%&#;6_/#=R]&#,*ẳ/0#W)A/0#0Q'#WK6#&Jn'#
8T8D-#E1F'#&6%/#*P/*#&*H4#'A/0#&*V'#dO)S#
#
8
&*
&*
8
M
U
g
F
W
+Ê
#=hChyD#
&J4/0#EQS#
U-#M
8#
T 3<'#;i'#WP#RARH/#)B/#&J4/0#R]&#,*ẳ/0#W)A/0#0Q'#WK6#&Jn'#8j#
## F
&*
-#
&*
8
W
T#;6_/#&G'*-#RAE)/#'*B/0#)B/#EB6#WK6#&Jn'#8#'`O#&6%&#;6_/#&*)#*ẹ,j#
- Kiểm tra độ bền của cột chịu nén lệch tâm#'*4#,*+,#7^#E%/#d<#,*2&#&J6^/#?6%/#
;5/0#;ẻ4#7*6#'Z*A/0#'*\)#&J<'#&6%,#&a6#&Ji/0#EZ/0-#E1F'#3PR#?q/0#&*+,#'Q#06K6#*5/#
'*a:#s
'
#Ê#y8!#MkO-#'Q#t Ê#!-yg
'
#&*H4#'A/0#&*V'#dO)S#
#
/
8
&*
&*
88
M
U
"
F g
'gW
ổử
+Ê
ỗữ
ốứ
#=hCh6D#
&J4/0#EQ#/-#'
8#
3P#'2'#*_#dB#,*n#&*)Z'#*o/*#;5/0#&6%&#;6_/-#3(:#&*H4#?a/0#hT {C#
- Kiểm tra ổn định tổng thể của đặc chịu nén lệch tâm trong mặt phẳng uốn
ã#LJ1Y/0#*F,#R]&#,*ẳ/0#&2'#;n/0#'`O#RARH/#)B/#M
8
#&J|/0#WK6#R]&#,*ẳ/0#EB6#
8V/0#'`O#&6%&#;6_/#'Z&#=R]&#,*ẳ/0#W)A/0#0Q'#WK6#&Jn'#8T8D-#E1F'#&G/*#&42/#&*H4#'A/0#&*V'S#
# R
F
N
lt
x
Ê
j
=s #=hChzD#
Ch"ơng 4 - kết cấu thép y
y
&J4/0#EQS##
3&
8
j
T#*_#dB#[/#E\/*#'`O#'Z&#'*\)#/+/#3_'*#&9R-#E1F'#82'#E\/*#&*H4#?a/0#hT3!##
##################,*n#&*)Z'#WP4#EZ#Ra/*#r):#1K'#
l
#WP#EZ#3_'*#&9R#&G/*#E[6#R
"
S#
###########R
"
#e#
h
R
8
##=hCh8D#
WK6S#
h T *_#dB#7^#&K6#a/*#*1ở/0#'`O#*o/*#;5/0#&6%&#;6_/-#3(:#&*H4#?a/0#hT3!j
R
8#
T#EZ#3_'*#&9R#&1I/0#EB6S#
#####################################
8
8
8
M
F
R
UW
=###################################=hCh{D#
F#T#;6_/#&G'*#&6%&#;6_/#'Z&j#
W
8
#T RARH/#'*B/0#)B/#&56#&*K#'*\)#/+/#3K/#/*(&#'`O#&6%&#;6_/j#
U-#M
8
#T#3<'#;i'#WP#RARH/#)B/#E1F'#3(:#&J4/0#'|/0#RZ&#&[#*F,#&a6#&Ji/0-#WK6##
#######################062#&J\#'`O#M#E1F'#3(:#/*1#dO)S#
##############ã#ĐB6#WK6#'Z&#&6%&#;6_/#7*A/0#E[6#'`O#*_#7*)/0#&*o#M#3(:#062#&J\#3K/#/*(&##
##########################&J4/0#,*5R#W6#'*6X)#;P6#'Z&C#
#####ã#ĐB6#WK6#'Z&#RZ&#E~)#/0PR#RZ&#E~)#&<#;4#&*o#M#3(:#062#&J\#ở#/0PR#/*1/0##
#######7*A/0#/*ỏ#*I/#RARH/#&56#&6%&#;6_/#'2'*#'*9/#'Z&#RZ&#E45/#?q/0#RZ&##
#######,*~/#?O#'*6X)#;P6#'Z&C#
#
T#Kiểm tra ổn định ngoài mặt phẳng tác dụng của mômen uốn#=7*6#)B/#&J4/0#R]&#
,*ẳ/0#'Q#EZ#'V/0#3K/#/*(&#J
8
>J
:
#WP#&J|/0#WK6#R]&#,*ẳ/0#EB6#8V/0D-#&*H4#'A/0#&*V'#dO)S#
#
:
U
g
'F
=
j
#=hCy!D#
&J4/0#EQS#
j
:
#T#*_#dB#)B/#;i'#EB6#WK6#&Jn'#:-#82'#E\/*#&*H4#'A/0#&*V'#=hC zDj#
#'#T#*_#dB#E1F'#82'#E\/*#/*1#dO)S##
############ã#$*6#EZ#3_'*#&9R#&1I/0#EB6#R
8
Ê#yS#
############################
8
'
"R
b
=
+a
#############################################=hCy"D#
&J4/0#EQ a-#b#3P#'2'#*_#dB-#3(:#&*H4#?a/0#hT3 C#
ã#$*6#EZ#3_'*#&9R#&1I/0#EB6#R
8#
Ê#"!S#
############################
8:;
'
"R /
b
=
+jj
#######################################=hCy D#
&J4/0#EQ#j
;
#3P#*_#dB#[/#E\/*#'`O#;~R-#E1F'#82'#E\/*#/*1#&J4/0#'A/0##
#########&*V'#=hC{DC#
