PSI - Issue 81

Volodymyr Romaniuk et al. / Procedia Structural Integrity 81 (2026) 234–239

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5. Conclusions As a result of the theoretical calculations and experimental studies performed, it was established that the stress values in the calculated most stressed cross-sections of the arch chords in the case of prestressing of the strut have the opposite sign compared to the stress values from the action of the external loads. Creating initial stress in the arch strut through its pre-tensioning allows the maximum stresses in the design cross-sections of the upper chord of constant height along its length to be reduced, thus obtaining a reserve of bearing capacity according to ultimate limit state of 10-15% compared to a similar structure without pre-stressing. The obtained results of experimental studies generally confirmed the theoretical premises: the average discrepancy between stress values is 5.5%, with a maximum of 6.8%. References DBN V.2.6-198, 2014. Steel Structures. Design Standards. Ministry of Regional Development of Ukraine, Kyiv. EN 1993-1-8, 2005. Eurocode 3: Design of Steel Structures. Morkhade, S.G., Gupta, L.M., 2015. An experimental and parametric study on steel beams with web openings. International Journal of Advanced Structural Engineering 7, 249 – 260. Romaniuk, V., Supruniuk, V., Bezniuk, L., Kononchuk, O., Meshcheryakova, O., Sorochak, A., 2024a. Experimental studies of a steel rafter arch with a perforated upper band. Procedia Structural Integrity 59, 479 – 486. Romaniuk, V., Bezniuk, L., Supruniuk, V., Kononchuk, O., Meshcheryakova, O., Sorochak, A., 2024b. Features of the work of continuous perforated beams near intermediate supports. Procedia Structural Integrity 59, 471 – 478. Shardakov, I., Shestakov, A., Son, M., Zemlanuhin, A., Glot, I., 2018a. Beam to column flange connection: from elasticity to destruction (theory and experiment). Procedia Structural Integrity 13, 1324 – 1329. Shardakov, I., Shestakov, A., Glot, I., 2018b. Experimental and Theoretical Study of Deformation Processes in a Flange Connection of Iron Beams. Procedia Structural Integrity 9, 207 – 214. Tsavdaridis, K.D., D'Mello, C., 2011a. Vierendeel Bending Study of Perforated Steel Beams with Various Novel Shapes of Web Openings, through Non-linear Finite Element Analyses. Journal of Structural Engineering 138 (10), 1214 – 1230. Tsavdaridis, K.D., D'Mello, C., 2011b. Web Buckling Study of the Behaviour and Strength of Perforated Steel Beams with Different Novel Web Opening Shapes. Journal of Constructional Steel Research 67 (10), 1605 – 1620. Wang, J., Uy, B., Thai, H.-T., Li, D., 2018. Behaviour and design of demountable beam-to-column composite bolted joints with extended end-plates. Journal of Constructional Steel Research 144, 221 – 235.