tutorial (connection)

TUTORIAL CO}TNECTIONS , Qr (4 Chek if a 125 x 75 x l0 unequal angle in Figure Ql.(a) with gr4de 3275 steel and welded by the longer leg is suitable to resist a design axial ten-sidn load, rv3, of , 418 kN. (10 marks) O) Check if al25 x 75 x l0 unequal angle in Figure Ql.(b) with grade 5275 steel, bolted (with a line of four lS nlm) HSFG bolts at t to mm centreg through the longer leg is suitable to resist a design axial load fiIo, of 4lg kN. (15 marks) Q2 Figure Q2 shows a bracket resist permanent actior, Gr - 100 kN and variable action, Q: 120 kN. Verify the connection in Figure Q2 is aiequate if the connection loaded in direct shear and torsion. Assume shear occurs at bolt areaa. Given; Plate thickness : 20 mm (5355) Bolt diameter : 27 mm (Gred-4.6) (25 marks)

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8/13/2019 Tutorial (Connection)

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TUTORIAL CO}TNECTIONS

Qr (4 Chek if a 125 x 75 x l0 unequal angle in Figure Ql.(a) with gr4de 3275 steel andwelded by the longer leg is suitable to resist a design axial ten-sidn

load, rv3, of, 418 kN.

(10 marks)

O) Check if al25 x 75 x l0 unequal angle in Figure Ql.(b) with grade 5275 steel, bolted(with a line of four lS nlm) HSFG bolts at t to mm centreg through the longer leg issuitable to resist a design axial load fiIo, of 4lg kN.

(15 marks)

Q2 Figure Q2 shows a bracket resist permanent actior, Gr - 100 kN and variable action,Q: 120 kN. Verify the connection in Figure Q2 is aiequate if the connection is loaded indirect shear and torsion. Assume shear occurs at bolt areaa. Given;

Plate thickness : 20 mm (5355)Bolt diameter : 27 mm (Gred-4.6)

(25 marks)

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125 x 75 x 10 unequal angle

Gusset plate

, Fieure Ol.(a)

125 x 75 x 10 unequal angle

18 mm diameter holes for HSFG bolts

Gusset plate

Fieure O1.0)

All dimensions in mm

FIGT]RE (N

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8rc43003/8FC4033

FORMTII"A

D Pc4,'t.H-Frrry)

Fr,nd =

TABLE )

Tehle 1: Channc&,rfttic Stretgthc$ a*d fi@xtract fnom Tabb 7 ofEN lcf/25-2)

Steelgrade

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8FC43003/BFC4033

Table 2: Bolts area

Table 3: Design resistance

(Extract from Table 7 of EN10025-2)

d (mm)8 10 t2 t4 16 18 20 22 24 27

A (mm)50 78 lr3 t54 201 254 314 380 452 573

707

As (mm2) 36 58 84 ll5 157 192 245 303 3s3 459 561

Steel GradeThickness of the

Jointed part weaker(mm)

Ultimate strength ,fi(N/mm2)

s 235b<3 360

3< te < 100 360

s275tr(3 430

3<h<100 410

s 355tp( 3 510

3<b< 100 470

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BFC43003/BFC4033

Qs. Figure Q3 shows a bolted connection supporting a short cantilever I beam subjected to afactoredconcentratedloadof180kN.Checkthicapacityoftheconnection.

FIGT]RE, 03

a) D what is the important function of connection in the structure.ii) Determine and illushate 4 mod of failure for the direct bolt connection.

b) Figure Q4 shows a bracket connection. The factoredload 2g0 kN isplaced on the bracket at distance e mm. the bracket is welded with a plate size 400 x

200 x 10mm width. Weld size 8mm and 4mm is used. 6 bolts with adiameter 24mm(Grade 4.6) is used to connect plat and flange column. In the early check bolt isfound failed compare to the welded conneciion plat at the flange Lolumn. Using class43 electrode on a Grade 275 plate:

(i) Determine most safely distance e mm so that the connection is not fail

(iD Using answer in (a) check the weld capacity

l0 mm thict End

Section X-X