Assessment of Existing Structures and Repairs - Offshore Structures: Design, Construction and Maintenance - page 479

10

Elastic modulus

Yield strengh
at 2% strain

80

60

20

0 Temperature,°C

FIGURE 7.8 Percentage reduction in yield strength and elastic modulus by increasing temperature.

γ M1 = 1.1 and γ M.fi =1

Based on EC3, for steel, material partial safety factors

E f : d : t

η f =

E d
It is relative to ambient temperature at the design load.
η f = γ GA G

+ ψ 1 : 1 Q k : 1
γ G G k + γ Q : 1 Q k : 1

(7.25)

where Q k.1 and G k are the characteristic values of the variable and permanent
loads, respectively.
Note that the partial safety factor for permanent load γ G is equal to1.35, and

γ Q.1 is equal to 1.5 in the fire limit state,

the partial safety factor for variable load

where γ G.A = 1 for permanent loads and accidental design situation and ψ 1 : 1 = 0 : 5

for combination factor, variable loads and offices.

7.7.2 Tension Member Design by EC3
Design Loading: N d = 247.95 kN
Try IPE 100: (100

8 kg/m)
Design resistance: N .Rd = A t f y /

× 55 ×

γ M0
= 1030 × 0.275/[1.1] = 257.5 kN > 247.95