23/8/2022

DCC 40142
STEEL STRUCTURE DESIGN

It doesn’t matter what the subject is; once you’ve learnt how to
study, you can do anything you want.

mohdfahmiabdrazakpmu2021

 The design of connection whose function is to transfer

forces from beam to column, beams to beam, column to
foundation
 Connections must be designed at the strength limit state
 Average of the factored force effect at the connection and the force
effect in the member at the same point
 At least 75% of the force effect in the member

 Two types of connection are :

 Bolted Connection
 Welded Connection
mohdfahmiabdrazak

1
 23/8/2022

 All joint shall have a design a resistance such that the structure is capable of
satisfying all the basic design requirement given in standard and in EN 0993-1-1
 The partial safety factors ƔM for joints are given in Table 2.1.

mohdfahmiabdrazak

mohdfahmiabdrazak

2
 23/8/2022

mohdfahmiabdrazak

mohdfahmiabdrazak

3
 23/8/2022

mohdfahmiabdrazak

mohdfahmiabdrazak

4
 23/8/2022

mohdfahmiabdrazak

mohdfahmiabdrazak

10

5
 23/8/2022

mohdfahmiabdrazak

11

mohdfahmiabdrazak

12

6
 23/8/2022

mohdfahmiabdrazak

13

mohdfahmiabdrazak

14

7
 23/8/2022

mohdfahmiabdrazak

15

mohdfahmiabdrazak

16

8
 23/8/2022

mohdfahmiabdrazak

17

mohdfahmiabdrazak

18

9
 23/8/2022

mohdfahmiabdrazak

19

mohdfahmiabdrazak

20

10
 23/8/2022

mohdfahmiabdrazak

21

BOLT CONNECTION

DIRECT SHEAR SHEAR & TENSION SHEAR & TORSION

ANALYSIS : ANALYSIS :
Direct Shear Direct Shear
ANALYSIS :
Fs = P/n Fs = P/n
Direct Shear
FE,Vd = Fs
Fs = P/n
Torsional shear
𝑃. 𝑒. 𝑟
Tension Force 𝐹 =
(∑ 𝑥 + ∑ 𝑦 )
𝑃. 𝑒. 𝑦
𝐹 =
2 ∑ (𝑦 )
Resultant Of Direct shear and torsional

𝐹 = 𝐹 + 𝐹 + 2𝐹 𝐹 𝐶𝑜𝑠∅

Fv.Ed = FR

mohdfahmiabdrazak

22

11
 23/8/2022

 A connection is subjected to ultimate load of 120 kN. Check whether 24mm bolt
size in grade 4.6 is suitable. Eccentricity between point load to centroid of column
is 300 mm

mohdfahmiabdrazak

23

mohdfahmiabdrazak

24

12
 23/8/2022

 Design the bracket connection shown. Use 24mm bolt in grade 4.6 and steel grade
S275.

mohdfahmiabdrazak

25

mohdfahmiabdrazak

26

13
 23/8/2022

mohdfahmiabdrazak

27

mohdfahmiabdrazak

28

14
 23/8/2022

mohdfahmiabdrazak

29

mohdfahmiabdrazak

30

15
 23/8/2022

mohdfahmiabdrazak

31

mohdfahmiabdrazak

32

16
 23/8/2022

mohdfahmiabdrazak

33

WELDED CONNECTION

DIRECT SHEAR SHEAR & TENSION SHEAR & TORSION

ANALYSIS :
Direct Shear
ANALYSIS :
Fs = P/L ANALYSIS :
Direct Shear
Direct Shear
Fs = P/n
Fs = P/n

Torsional shear
Tension Force
𝑃. 𝑒. 𝑟
𝑃. 𝑒. 𝑦 𝐹 =
𝐹 = (∑ 𝑥 + ∑ 𝑦 )
2 ∑ (𝑦 )

Resultant Of Direct shear and torsional

𝐹 = 𝐹 + 𝐹 +2

mohdfahmiabdrazak

34

17
 23/8/2022

 A truss member size 75 x 50 x 8L in grade s275 carries unfactored dead load = 50

kN and unfactored imposed load = 65.7 kN. The end of the truss is connected to
another member by welding. Design the welded connection of the truss member
using electrode 42.

mohdfahmiabdrazak

35

mohdfahmiabdrazak

36

18
 23/8/2022

The Following figure shows a welded connection in which the weld is made on three sides only. The
connection has to carry an ultimate load of 150 kN. Design the connection using weld of grade 42

mohdfahmiabdrazak

37

mohdfahmiabdrazak

38

19
 23/8/2022

A bracket connection carrying shear and tension loads is shown below. Design the welded
connection below is adequate to carry applied loads. Steel is in grade S275 and electrode in grade 42

mohdfahmiabdrazak

39

mohdfahmiabdrazak

40

20