PSI - Issue 81

Volodymyr Romaniuk et al. / Procedia Structural Integrity 81 (2026) 276–281

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for e 0 = -50 mm for e 0 = 0 mm for e 0 = 50 mm

for e 0 = 100 mm for e 0 = 150 mm

Fig. 3. Theoretical values of stresses in the cross-sections of the half-arch chord along its length: (a) – in the upper flange; (b) – in the lower flange.

for e 0 = -50 mm for e 0 = 0 mm for e 0 = 50 mm

for e 0 = 100 mm for e 0 = 150 mm

Fig. 4. Experimental values of stresses in the cross-sections of the half-arch chord along its length: (a) – in the upper flange; (b) – in the lower flange.

Having performed interpolation of the experimental stress values obtained for the eccentricities of tie rod displacement e 0 =100mm and e 0 =150mm, it was found that the value of the optimal displacement is e 0 =112mm and it almost completely coincides with the theoretical value e 0 = 115 mm obtained by the formula (5). In this case, the maximum stress values are reduced to σ = -173.6 MPa, which provides a safety margin of 8.7%.