PSI - Issue 81

Yaroslav Kovalchuk et al. / Procedia Structural Integrity 81 (2026) 170–176

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Studies concerning the strength and deformability of welded truss elements and structures under static loads were conducted in works Zhaobo et al. (2023), Tiainen et al. (2027), Lan et al. (2018). It has been established that the overall strength of a welded truss is generally determined by the strength of its nodes, both under static loading Efendi (2024), Majko et al. (2022), Shao, (2017), Dodaran et al. (2021), Suo et al. (2018), Larsen et al. (2021), Kovalchuk et al. (2025) and cyclic loading Kaminski, Blonski (2022), Khademi (2017), Pidgurskyi et al. (2025), Tong et al. (2016), Hobbacher (2016), Poberezhnyi et al. (2016), Li et al. (2017). 2. Problem Statement Obtaining reliable design results for welded trusses enables the reduction of material consumption while ensuring structural strength and durability. Modern engineering technologies address this issue through the use of application software packages that are algorithmically based on the finite element method and operate according to the principles of computer simulation experiments. This approach provides significantly higher engineering productivity and enables consideration of a complex combination of multiple influencing factors (structural, technological, operational, emergency, etc.). Such an approach is particularly effective in the design and analysis of complex technical systems, including welded trusses, whose strength and deformability determine the structural integrity of the building or construction as a whole . The study investigates a typical trapezoidal 8000×560 mm truss with parallel chords, installed in the premises of an automotive service center, in order to determine its suitability for carrying loads from a suspended lifting crane. The purpose of the study is to determine the parameters of the stress-strain state (SSS) in the elements of a trapezoidal welded truss measuring 8000×580 mm with parallel chords under loading applied to the nodes of the lower chord using the methodology of a computer simulation experiment, to identify the locations of extreme value localization, and to determine the maximum load corresponding to the limit state of the given structure. Objective of the research. To achieve this purpose, it is necessary to carry out a computer simulation experiment for a trapezoidal welded truss measuring 8000×580 mm with parallel chords (Fig. 1), applying incremental loading up to structural failure, and to generate numerical and graphical data arrays describing the SSS parameters in the truss elements.

Fig. 1. Trapezoidal welded truss 8000×580 mm with parallel chords.

In the study, it is necessary to fully account for the structural (Fig. 2), technological (Fig. 3), and operational (Fig. 4) factors relevant to this truss.

Fig. 2. Structural configuration of the investigated truss.