Behaviour of Vertical Cylindrical Tank With Local Wall Imperfections

Šapalas, Antanas; Šaučiuvėnas, Gintas; Rasiulis, Konstantin; Griškevičius, Mečislovas; Gečys, Tomas

doi:10.3846/jcem.2019.9629

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…There could not be observed any plastic deformations right up to the point where the maximum load was reached. In the cases when steel rods are screwed with glue in the smaller diameter grooves the failure mode differs, showing ductile behavior at the time of failure [24]. The failure mode is the timber's local shear on the surface between the outer rod diameter and the timber, as shown in Fig.…”

Section: The Results Of the Experimental And Numerical Simulationmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Gečys¹,

Šaučiuvėnas²,

Ustinovichius³

et al. 2020

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The paper presents the analysis of strength and stiffness of metric threaded steel rods glued in glulam obtained by using two different gluing methods. The first method is used when the threaded steel rod is glued into a groove larger than the rod's diameter, while the second method is applied when the diameter of the groove is smaller than the diameter of the threaded steel rod. The steel rod is covered with glue before it is inserted into the smaller diameter groove. The first method investigates the 2-mm-thick glue-line, while the second method analyses the contact when the groove's diameter is 2 mm smaller than the outer diameter of the rod. Epoxy-type resin is used for both gluing methods. Different gluing methods present different interactions between the steel rod and glulam which result in different failure modes. The second method presents a plastic failure between the steel rod and glulam caused by the local compression and shear of glulam. The presented studies are made using metric threaded steel rods of diameters M12 and M16. In total, 20 specimens are experimentally tested in tension-to-tension tests performed according to EN 26891. The interaction between glulam and glued steel rods is also investigated using the 3D finite element modelling. The results obtained using the proposed 3D finite element model with different contact conditions between steel and glulam and the failure criterion for timber shear are well in line with the experimental findings.

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Section: The Results Of the Experimental And Numerical Simulationmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Gečys¹,

Šaučiuvėnas²,

Ustinovichius³

et al. 2020

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“…1 for storage of gasoline with volume of 1000 m 3 in integrated assembly point "Beshevsky", which was conducted by the "Donbass diagnostic center of building structures, buildings and structures" of the Donbas National Academy of Civil Engineering and Architecture. 2 The first of the proposed approaches can be classified as a classical one [14][15][16][17]. It involves determining the geometric shape of the shell surface of the studied engineering structures.…”

Section: Methodsmentioning

confidence: 99%

Use of interpolation methods for modeling the stress-strain state of operated oil storage tanks

Konopatskiy,

Krysko,

Shevchuk

2023

Struct. Mech. of Eng. Const. and Build

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The aim of the research is the comparison of two approaches for computer modeling of the stress-strain state of thin-walled shells of engineering structures, considering the imperfections of the geometric shapes arising due to their operation. The object of the study is the operated steel vertical cylindrical reservoir with imperfections of the geometric shape intended for storage of petroleum products. The first, so-called classical, approach provides geometric modeling of the surface of the tank's shell with the subsequent import of the geometric model into one of the systems of finite element analysis to calculate the stress-strain state of the structure and determine its technical condition, and the possibility of further operation. The geometric modeling of the shell surface with imperfections was performed using a two-dimensional interpolation method based on the 1st order smoothness outlines implemented in the point calculus. The calculation of the stress-strain state of the shell was carried out in the SCAD Office computer complex, taking into account geometric and structural non-linearity on the basis of the octahedral tangential stress theory. The second approach assumes modeling of an array of functions of vertical deflection of the tank wall by means of interpolation, solution of an array of differential equations of the elastic cylindrical shell under axisymmetric loading, improved by introduction of vertical deflection functions of the wall, followed by two-dimensional interpolation and analysis of the deformed state of the shell based on displacements arising in the tank wall from the hydrostatic load. As a result of the effective use of two-dimensional interpolation in the process of implementing the second approach, it was possible to achieve a significant increase in the speed of the numerical solution while maintaining sufficient accuracy for engineering calculations.

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“…In these critical areas, mesh size was decreased in such a way that the endplate and the bolt hole would be meshed with four layers of elements along their thicknesses, which exceeds recommendations of Molitoris et al [29]. Another plausibility of assessing the mesh quality is to directly compare FEA results with the experiments [30,31]. The material model for the concrete was assumed to be linear elastic.…”

Section: Finite Element Analysismentioning

confidence: 99%

Moment Resisting Connection with Curved Endplates: Behaviour Study

Mudrov¹,

Šapalas²,

Šaučiuvėnas³

et al. 2021

Applied Sciences

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This article provides a behaviour analysis of moment resisting joints with curved endplates. This is a new type of connection that can be used for joining steel beams to the circular hollow section (CHS) columns by means of bolts. Some researchers apply the Eurocode model without considering the differences in calculation schemes and assumptions, such as by using the general model of an equivalent T-stub in tension. Consequently, many of the existing behaviour studies are somewhat misleading, thus there is a need for further research. Apart from the absence of analytical methods that are devoted to predicting the initial stiffness and strength of the curved T-stub, other technical difficulties were encountered, such as gaps between the endplate and the column, as well as the initial pre-loading force of the bolts. In the previous studies, endplates were manufactured by rolling flat plates to the precise curvature which resulted in firm contact. In contrast, in this study, endplates were manufactured from a standard CHS tube, which led to significant initial gaps. Meanwhile, in terms of preloading force, it was found that it affected the moment resistance of the joint. This paper discusses problems associated with ongoing researches and presents experimental tests of the two connections. The obtained results were further used in the parametric finite element analysis (FEA) to determine the effect of the gaps and preloading force of the bolts on the moment resistance and initial rotational stiffness of the joint. The results indicate that the behaviour of curved plated connections is exceedingly complex and that the preloading force is the key factor, therefore, it should be controlled.

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Behaviour of Vertical Cylindrical Tank With Local Wall Imperfections

Cited by 7 publications

References 6 publications

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

Use of interpolation methods for modeling the stress-strain state of operated oil storage tanks

Moment Resisting Connection with Curved Endplates: Behaviour Study

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