PSI - Issue 36

Yaroslav Shved et al. / Procedia Structural Integrity 36 (2022) 10–16 Yaroslav Shved; Yaroslav Kovalchuk; Liudmyla Bodrova; et al. / Structural Integrity Procedia 00 (2021) 000 – 000

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The obtained values of the maximum deformations along the horizontal axis and the maximum deformations along the vertical axis of the bottom chord of the truss depending on the load level are summarized in table 3. According to the results of a computer simulation experiment, the parameters of the SSS of a welded truss under the action of static loads of different magnitudes are determined.

Table 2. SSS indicator of 18000 × 3600 mm welded truss made of 80 × 80 × 10 mm angel bar No. Load P, N Tension σ, MPa Elongation of the bottom chord Δι, mm

Deflection o f the bottom chord δcut, mm

#1 #2 #3 #4 #5 #6 #7 #8 #9

10000 100000 197000 200000 250000 300000 350000 380000 400000 425000 450000 475000 500000 525000 550000

11.95635 70.49184 134.207 137.5604 171.0952 204.5989 238.6316 260.0096 274.6763 293.6403 302.3893 306.8689 307.1923 313.279 321.5399

1.018213 7.371576 14.0779 14.43087 17.96051 21.49413 25.05287 27.23044 28.70277 30,57034 32.52299 37.85588 42.49597 97.40672 161.9371

7.818906 21.4593 40.79783 41.81565 51.99389 62.17759 73.21011 81.46066 87.81001 97.22484 108.594 137.9766 160.9409 264.6089 375.5726

#10 #11 #12 #13 #14 #15

Thus, the loss of strength of 18000 × 3600 mm truss made of 80 × 80 × 10 mm angular profile according to the results of computer simulation experiment occurred under the load Pmax = 405 kN, and plastic deformation of the structure according to the calculations occurred at Ppl = 340 kN.

Fig. 4. (a) diagram of elongation deformation along the bottom chord of 18000 × 3600 mm truss made of 80x80x1 0 mm angle bar at different load levels; (b) diagram of deflection deformation along the bottom chord of 18000 × 3600 mm truss made of 80x80x10 mm angle bar at different load levels; (c) diagram of stresses along the bottom chord of 18000 × 3600 mm truss m ade of 80x80x10 mm angle bar at different load levels; (d) diagram of deformation of 18000 × 3600 mm welded truss made of 80x80x10 mm angle bar.