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AISC-34
Bracing Connection Design...
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skrai4u
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PROJECT: PROJECT: STEEL BUILDING DESIGN CASE STUDY SUBJECT: Bracing connection, gusset !ate "esign# Brace !ine B%, secon" '!oor# '!oor#
S$EET %&& o' %(%
f + resistance 'actor
)* + seci'ie" AST-. /ini/u/ *ie!" stress )u + seci'ie" AST-. /ini/u/ tensi!e strengt0 Rn + strengt0 t + t0ic1ness o' connecte" art Pu + 'actore" !oa" to 2e resiste" " + "ia/eter o' t0e 2o!t e2 + one30a!' t0e "et0 o ' t0e 2ea/, in# ec + one30a!' t0e "et0 o' t0e co!u/n, in# "2 + "et0 o' t0e 2ea/, in# "c + "et0 o' t0e co!u/n, in# 4## + 4or1ing oint# N + 0ori5onta! "istance o' gusset !ate, in# 6 + 7ertica! "istance o' gusset !ate, in# a = "istance 'ro/ t0e 'ace o' t0e co!u/n '!ange to t0e centroi" o' t0e gusset3to32ea/ connection, in# b = "istance 'ro/ t0e 'ace o' t0e 2ea/ '!ange to t0e centroi" o' t0e gusset3to3co!u/n connection, in#
A4 +cross section area o' t0e 40it/ore section section
Pu + B
E!e7ation 6ie4
C
%&8#9 1
D
; 1
%(
A
E (9
P!an 6ie4 -e/2er A3E, Interior '!oor gir"er: W24x68 AST- & "2 +
9 1si )u + ;> 1si
Column
Brace 2L6x4x1/2
W10x49
1
-e/2er A3B, Interior co!u/n: W10x49 AST- & "c +
9 1si )u + ;> 1si -e/2er A3C, Brace: 2L6x4x1/2LLBB A(; 2L6x4x1/2LLBB A(; )* + (; 1si )u + >? 1si
Gusset Plate
W.P.
15
Girder W24x68
Re" 'ont in"icates user inut
PROJECT: STEEL BUILDING DESIGN CASE STUDY SUBJECT: Bracing connection, gusset !ate "esign#
S$EET %&( o' %(%
Use A(&>3N 2o!ts in stan"ar" 0o!es,(=@ in "ia/eter# fRn +
Design s0ear strengt0 o' one 2o!t, "ou2!e s0ear LR)D Ta2!e 83%9.
(%#? 1
Check bearing strength @ each bolt hole: fRn + f @ " t )u. + f + 9#8>.
@>#8
1is
(%#?
1is
O!
Check tension "iel#ing on the Whit$ore section:
Column Brace 1
15
Gusset Plate
W"itmore section
Girder
* + tan (9 o ; +
(#>
in
* 0°
;
fRn + f )u A4. + f + 9#.
!Note:
Assu/e si/!i'ie" 0it/ore section "ou2!e "as0e" area. 'or t0e urose o' t0is !a2# T0is "esign 4i!! 2e /ore conser7ati7e# &@?#9 1is
%&8#9
1is
A4 + * * >Per# "istance 2et4een center o' 0o!es..9#>
O!
Re" 'ont in"icates user inut
PROJECT: STEEL BUILDING DESIGN CASE STUDY SUBJECT: Bracing connection, gusset !ate "esign#
S$EET %&@ o' %(%
%istrib&tion o' brace 'orce to bea$ an# col&$n: Uni'or/ 'orce /et0o". )ro/ t0e /e/2er an" 'ra/e geo/etr* e2 + "2=& + ec + "c=& + tanq =
@
in in
q
%( %>
in or"er to re/ain 'ree o' /o/ents on t0e connection inter'aces, t0e 'o!!o4ing eression /ust 2e satis'ie":
tan q e2 3 ec + a 3 b tan q a 3 b tan q =
a!!o4 %=& in# 2et4een gusset an" co!u/n 'or t0e set2ac1
in # Brace
Column 0.5
1
15
Gusset Plate
$
b ec
Girder
a e%
W.P.
(r" a g&sset )late : 1/2 a= b=
in#
%;#> ;#8
16 1/8
in# 0ori5onta!!*
* */4
in# 7ertica!!*
in in
aF = tan q e2 3 ec b tan q = a - aF +
in
.se
16*
in an#
in
,
16 1/8 in * */4 in Re" 'ont in"icates user inut
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