PSI - Issue 64

Atsushi Sato et al. / Procedia Structural Integrity 64 (2024) 991–998 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

997

7

Table 2b. Buckling strength of L25×25×3  c ( l mm) Ncr (kN) ( N cr / N y ) Single

Reinforced

No.1

No.2

No.1

0.432 (156) 0.571 (206) 0.848 (306) 1.13 (406) 1.35 (1.61)

26.6 (0.518) 29.0 (0.564) 19.1 (0.372) 15.8 (0.307) 12.8 (0.249)

30.0 (0.584) 23.4 (0.455)

29.4 (0.572)

- -

-

15.5 (0.301) 13.3 (0.259)

31.6 (0.615) 24.6 (0.479)

Figs. 7 and 8 show a comparison with the proposed strength formula. Fig. 7 compares with Eq.(6), and Fig. 8 compares with Eqs .(7) and (9). From Fig. 7, the proposed formula can evaluate the buckling strength of the eccentrically loaded members. While there may be conservative results, the evaluated results are reasonably accurate. Based on Fig. 8, all specimens fell within the range of Eq. (9), and Eq. (7) could not be evaluated. The test results were conservatively evaluated and are reasonably accurate.

a)

b)

Fig. 7 Evaluation of proposed formula for an eccentrically loaded member: a) L20×20×3; b) L25×25×3.

a)

b)

Fig. 8 Evaluation of proposed formula for an eccentrically loaded member with reinforcement: a) L20×20×3; b) L25×25×3.