PSI - Issue 44

Federico Gusella et al. / Procedia Structural Integrity 44 (2023) 790–797 F. Gusella et al./ Structural Integrity Procedia 00 (2022) 000 – 000

792

3

Table 1. Geometrical parameters of fuse (Double channel – RHS).

(SINGLE UPN)

Elastic section modulus

Plastic section modulus

Second moment of area

Cross-section area [cm 2 ]

h [mm]

b [mm]

a [mm]

e [mm]

r [mm]

Weight [kg/m]

J xx [cm 4 ] 26.5 57.5 205.0

J yy [cm 4 ]

W e,xx [cm 3 ] 10.1 17.7 41.1

W pl,xx [cm 3 ] 13.0 21.5 49.0

50 65

38 42 50

5

7

7

5.6 7.1

7.1 9.0

9.1

5.5

7.5 8.5

7.5 8.5

14.0 29.1

100

6

10.6

13.5

RHS

Elastic section modulus

Plastic section modulus

Second moment of area

Cross-section area [cm2]

Shape b x a

s [mm]

Weight [kg/m]

J xx [cm 4 ] 80.1 617.3

J yy [cm 4 ] 25.6 328.6

W e,xx [cm 3 ] 20.0 82.3

W pl,xx [cm 3 ] 26.1 97.4

80x40

5 4

8.4

10.7 19.4

150x100

15.2

Table 2 gives the experimental yield strength f y , the ultimate strength f u , the percentage total elongation at failure ( ∆ ), and the steel grade for each specimen. All experimental values ( f y , f u and ∆ ) represent the average values of three coupon tests, according to ISO 6892-1:2009, on the steel coil used to manufacture specimens. Table 3 gives the characteristic yield strength f yk , the ratio c/t , and the section class of the fuse (class 1) according to Eurocode 3.

= − [%] (*) 35.8

Table 2. Mechanical features of steel from coupon tests

Member UPN50 UPN65 UPN100 80x40x5

f y [N/mm

2 ]

f u [N/mm

2 ]

Steel Grade

352 322 322 381 340

472 451 451 432 465

S275 S275 S275 S235 S235

36.3 34.9 28.5 35.2

150x100x4

(*) L f and L i are the final length at fracture and the initial length of the specimen used in the coupon test, respectively.