AISC-34

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 

)* + seci'ie" AST-. /ini/u/ *ie!" stress )u + seci'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 "et0 o ' t0e 2ea/, in# ec + one30a!' t0e "et0 o' t0e co!u/n, in# "2 + "et0 o' t0e 2ea/, in# "c + "et0 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 inut

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

1is 

(%#?

1is

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 urose o' t0is !a2# T0is "esign 4i!! 2e /ore conser7ati7e# &@?#9 1is 

%&8#9

1is

 A4 + *  *  &#>Per# "istance 2et4een center o' 0o!es..9#>

O!

Re" 'ont in"icates user inut

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 eression /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 inut