PSI - Issue 66

Jiaqi Li et al. / Procedia Structural Integrity 66 (2024) 221–228

226

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Author name / Structural Integrity Procedia 00 (2025) 000–000

column joint and the energy dissipation joint indicate that the cyclic stiffness of the energy dissipation joint is greater, the yield displacement of the two is close, and the energy dissipation joint has a larger yield load.

Fig. 8. Stress nephogram

2.0×10 5

Normal joint Energy dissipation joint

1.5×10 5

1.0×10 5

5.0×10 4

0.0

− 5.0×10 4

Load (N)

− 1.0×10 5

− 1.5×10 5

− 2.0×10 5

− 100

− 50

0

50

100

Displacement (mm)

Fig. 10. Skeleton curves

Fig. 9. Hysteresis curves

4. Effect of strength of low yield point steel In order to investigate the effect of low yield point steel strength on the energy dissipation capacity of the energy dissipation joint, numerical simulations are conducted on it using three types of low yield point steel: LYP100, LYP160, and LYP225. The hysteresis curves of the three types of energy dissipation joints are shown in Fig. 11, and the skeleton curves are shown in Fig. 12. From Fig. 11 and 12, it can be seen that the strength of low yield point steel has little effect on the hysteresis curve of the energy dissipation joint. As the strength of low yield point steel increases, the yield load of the energy dissipation joints slightly increases. Therefore, considering the cost, it is recommended to use LYP100.

Table3 Parameters of low yield point steel [16] E /MPa ν

f y /MPa

f u /Mpa

ε u /% 27.02 24.16 23.32

LYP100 LYP160 LYP225

199000 194000 202500

0.3 0.3 0.3

128 186 191

252 294 295

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