PSI - Issue 59

Hud Mykhailo et al. / Procedia Structural Integrity 59 (2024) 617–621 Hud Mykhailo / Structural Integrity Procedia 00 (2019) 000 – 000

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1. Introduction. Floating pools are a unique structure, as their main structural elements are only affected by their weight during transport and installation. Thus, during operation, the pool is partially submerged in the water and remains in a constant equilibrium state. This is possible due to the fact that the mass of water in the middle of the pool and the mass of the supporting structure of the pool bowl are fully compensated by the Archimedean force. The most critical phase of a floating pool's functioning is moving the ready-to-use metal pool bowl without water to its main location using a lifting crane. During this process, a set of forces acts on the metal bowl, which is caused by the weight of the pool bowl, equipment located in the bowl, and finishing materials. The aim of this paper is to numerically analyze the influence caused by the location of horizontal ties on the deformability of the bottom of a floating pool. This goal is determined by the necessity for solving the problems of assessing the deformability of the bottom of a floating pool. Using the finite element method (FEM) to investigate the effect of the location of horizontal connections on the deformability of the bottom of a floating pool. Assessment of the influence of the joint operation of the foundation slab with the spatial structure of the grain flow tower on the frequencies and shapes of the grain flow tower's natural oscillations. This work is devoted to solving the problems of assessing the stability and fatigue strength of the grain flow tower under seismic loads by Hud et al. (2022). The influence of deformations of the main frame of the structure on the stress-strain state of its separate part using FEM was studied by Kolisnyk et al. (2022). Modelling of bended reinforced concrete elements before and after under static loading was made by Kononchuk et al. (2022). Numerical results were performed taking into account non-linear behaviour of rebar and deformation of concrete with further cracking. Problems of designing welded rafter trusses with the optimal ratio in strength and material consumption and optimization criteria are proposed, and the expediency of using these criteria for welded trusses is substantiated. The method for optimizing the construction of a rafter-welded truss was proposed using the ANSYS software for a variable number of angle bars within the standardized profiles for the truss by Shved et al. (2022). Warm prestressing (WPS) of a cracked body consists in loading the body at a temperature above the ductile – brittle transition temperature, which results in a significantly higher brittle fracture resistance of the material by means of a finite-element method (FEM) by Yasniy et al. (2011). 2. Modelling the bottom of a floating pool bowl The numerical calculation was accomplished using the national software package LIRA, which operates using finite element modeling (FEM). To determine the deformability of the bottom, a rod model was constructed (Fig. 1), on the basis from which the necessary calculations were performed. In Cartesian coordinates, a finite element rod model was created of the pool bottom measuring 25x10 m, which corresponds to the actual dimensions of the structure. The main structural element is the trusses, which are arranged in 1-meter increments and are connected by spacers and horizontal and vertical ties, thus forming a spatial structure.

Fig. 1. Finite element rod model of the pool bottom