PSI - Issue 59

Volodymyr Romaniuk et al. / Procedia Structural Integrity 59 (2024) 479–486 Volodymyr Romanіuk et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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a

b

Designations:

– theoretical

– experimental

Fig. 4. Deflection curves of the top chord of the arch under load schemes: a – symmetric; b – asymmetric.

calculation scheme, such a connection is considered hinged or rigid. In this context, the fastening elements serve merely to secure individual structural elements in their designated positions. In reality, under the action of an external load, the beams bend, causing deformation in the fastening elements. This interference with free deformations on the supports, results in these supports become partially rigid. Consequently, this affects the redistribution of forces along the entire length of the beam. For example, rigid flanged bolted connections, such as those in comb node A, act as partially hinged. Theoretical and experimental studies conducted by the authors of this work confirm these observations (Romaniuk et al., 2021, 2023). Not only their load-bearing capacity and deformability but also the load-bearing capacity of structural elements connected at these nodes depends on the correct consideration of the actual stiffness of such nodal connections. During the tests of a steel perforated arch with a rigid flanged ridge node under a symmetrical loading scheme and in

Designations:

– theoretical

– experimental

Fig. 5. Horizontal movement of the hinged support.