PSI - Issue 81

Mykhailo Hud et al. / Procedia Structural Integrity 81 (2026) 417–421

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Applications of the finite element method (FEM) in simulating the behavior of engineering structures are demonstrated, for instance, in Yasniy (2011). The investigation of natural linear oscillations also relies extensively on FEM-based techniques, supported by established research contributions from Yasniy (2020), Pellicano and Avramov (2007), as well as Pradyumna and Bandyopadhyay (2008). Additionally, the parameters of damping elements employing SMA-based alloys are presented in the study by Iasnii (2020), offering essential material inputs for modeling energy dissipation mechanisms in dynamically loaded structures. 2. Modelling A baseline computational model of the frame (Fig. 1) for a single-storey industrial building was developed in the Lira software environment using closed rod-type finite elements. The geometric parameters of the structure are as follows: a width of 18 m and a column height of 4 m to the underside of the truss. The length of the building is equivalent to six standardised modules, each measuring 6 metres. The structural scheme incorporates reinforced concrete columns of class C16/20, while the truss elements are fabricated from cold-formed welded hollow sections. The mechanical properties of the S235 steel material were used in the modeling: Young's modulus E = 2.1  10 5 MPa; Poisson's ratio  = 0,3; ρ= 7,8 . 10 4 N/m 3 .

Fig 1. Basic frame model

The second frame model (Fig. 2) demonstrates how the truss ridge is connected by a system of additional rod elements placed in the upper part of the structure, extending the basic geometric configuration of the frame.

Fig 2. The second frame option

The third frame configuration (Fig. 3) introduced cross-bracing into the lower chord of the truss, consisting of a pair of rod elements arranged in an intersecting configuration. The configuration was developed to establish an additional bracing contour between the nodes of the lower chord, with the objective of enhancing the spatial organisation of the rod elements in this section of the truss.