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Number of results: 55
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Abstract

The paper presents a certain way which determines the critical buckling force for a micro-heterogeneous FGM plate band. A stiffness matrix of an individual cell of such band, different for various cells, has been determined. The obtained matrix can also be treated as a variable stiffness matrix of a “superelement” in the Finite Element Method. A computational algorithm for the critical force as well as the way of testing of its correctness has also been presented. The results obtained for various support conditions have been compared to the values known from the literature. The influence of the number of cells on the critical buckling force has been investigated.

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Authors and Affiliations

M. Chalecki
G. Jemielita
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Abstract

In deformation analyses, it is important to find a stable reference frame and therefore the stability of the possible reference points must be controlled. There are several methods to test such stability. The paper’s objective is to examine one of such methods, namely the method based on application of R-estimation, for its sensitivity to gross errors. The method in question applies three robust estimators, however, it is not robust itself. The robustness of the method depends on the number of unstable points (the fewer unstable points there are, the more robust is the proposed method). Such property makes it important to know how the estimates applied and the strategy itself respond to a gross error. The empirical influence functions (EIF) can provide necessary information and help to understand the response of the strategy for a gross error. The paper presents examples of EIFs of the estimates, their application in the strategy and describes how important and useful is such knowledge in practice.
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Authors and Affiliations

Robert Duchnowski
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Abstract

The paper presents two alternative proposals for processing kinematic modular networks. The first method employs the idea of multi-group transformation which may be reduced to setting up a system of conditional equations with unknowns. The kinematic parameters (point motion velocities) are in this case determined after the observations are adjusted, together with point coordinates. The other proposal is based on the classic idea of the parametric method. The theoretical relationships for functional models of the network adjustment for each of the methods have been provided. The practical conditions have been presented for the application of the proposed models (methods) in constructing detailed computational algorithms. The modular network technology may be an appropriate method of geodetic determination of displacements, especially in difficult terrain conditions (slopes, trees, unfavourable exposition to satellite signals).
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Authors and Affiliations

Tadeusz Gargula
ORCID: ORCID
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Abstract

If we throw something into a river, how long will it take to reach a certain location downstream? We talk to Prof. Ian Guymer from the University of Sheffield about our increasingly complex models of this deceptively simple problem.

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Authors and Affiliations

Ian Guymer
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Abstract

The purpose of the paper was to design geometric models of the movable connection made of brass for three different attachment options and three different loads. The numerical analysis of the mechanical properties, stresses, strains and displacements using the finite element method was carried out in SolidWorks 2020 and their comparative analysis was performed. The computer simulations performed will allow the boundary conditions that directly affect the mechanical properties of the engineering materials to be optimised.
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Authors and Affiliations

Amadeusz Dziwis
1
ORCID: ORCID
Tomasz Tański
1
ORCID: ORCID
Marek Sroka
1
ORCID: ORCID
Agata Śliwa
1
ORCID: ORCID
Rafał Dziwis
1
ORCID: ORCID

  1. Silesian University of Technology, Department of Engineering Materials and Biomaterials, 18A S. Konarskiego Str., 44-100 Gliwice, Poland
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Abstract

The problem of determining displacements of objects is an important and current issue, in particular in terms of operational safety. This is a requirement that covers geodetic, periodic control measurements in order to determine horizontal and vertical displacements. The paper is focused on the analysis of vertical displacements. Geodetic measurements and their interpretation allow to reduce the risk of possible structural catastrophes. The major research topic of the majority of available papers is displacement determination of individual controlled points, in a situation where there are identified as fixed reference points. There are cases making identification of such points difficult or impossible to use in displacement analysis. This paper addresses a rare case of determining vertical displacements in unstable reference systems. Due to the fact that most of the existing and known literature methods do not always bring satisfactory results, the paper propose a new method of vertical displacement determination in the absence of reference points in the local coordinate system. Practical considerations on simulated data show that the presented method performs the task correctly.

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Authors and Affiliations

D. Filipiak-Kowszyk
W. Kamiński
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Abstract

The paper presents a procedure of calculation of natural frequencies and critical buckling forces of a micrononhomogeneous plate band resting on nonhomogeneous elastic subsoil and having any given boundary conditions. The band consists of N parts – cells [?] called elements, having a constant width l = L/N. Each band element consists of three parts – subelements with variable widths. The two of these subelements are matrix, the third – inclusion placed symmetrically relative to the matrix. Each band element is built of two isotropic materials. The matrix and inclusion bands have the stiffness and mass per area unit as well as they rest on the subsoil. The model has been derived with use of the classical displacement method. The stiffness matrix of any band element and then the band stiffness matrix have been built. An appropriate computer program has been written to calculate natural frequencies and critical buckling forces. A number of tests have been performed to check the working of the program and several calculative examples has been presented in the paper.
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Authors and Affiliations

Marek Chalecki
1
ORCID: ORCID
Grzegorz Jemielita
2

  1. Faculty of Civil and Environmental Engineering, Warsaw University of Life Sciences, Nowoursynowska166, Warsaw, 02-787, Poland
  2. Faculty of Civil Engineering, Warsaw University of Technology, Armii Ludowej16, Warsaw, 00-637, Poland
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Abstract

When it comes to research into changes which took place in Poland in the 10th and the first half of the 11th century and the emergence of the Piast dynasty’s state, the presence of an ethnically foreign population, its conditioning and effects have not been fully recognised. The few historiographical sources do not devote much attention to the arrival of foreign tribes; the single mentions typically pertain to the representatives of the elites, especially dynasties. Attempts have been made to analyse the phenomena by means of toponomastics and archaeology. Due to their ambiguity and late source confirmations, the results of toponomastic surveys do not allow to resolve the issue of migrations or displacement from the 10–11th centuries independently. However, the archaeological research carried out to date has revealed (beside a number of single historical objects related to the culture of Poland’s southern neighbours) grave fields and strongholds which could be potentially related to the representatives of foreign ethnic groups. The Poznań-Sołacz grave field (2nd half of the 10th century) and the Morawy grave field in Kuyavia (2nd half of the 11th century or possibly earlier) are related to a population from (Great) Moravia. Presence of a Hungarian population is traditionally attributed to the “old Hungarian” grave field in Przemyśl-Zasanie (dating back from the late 9th to the first quarter of the 11th century). On the other hand, the stronghold and the grave field in Niemcza in Silesia (dated back to the 970s and 980s) are connected with a Czech population. Unconfirmed grave fields and a handful of artefacts of Great Moravian origin are typical remains of strongholds in Gilów in Silesia and Czerchów near Łęczyca where presence of foreign warriors has not been ruled out. A question remains to what extent the material determinants of a foreign culture indicate presence of representatives of different ethnic groups and to what extent they are imports or copies. Undoubtedly, in a discussion of a foreign population genetic research may prove helpful, especially in grave fields associated with foreign populations. However, in order to analyse the issue in a comprehensive way, an interdisciplinary approach is required i.e. a combination of the methods of historical, archaeological and genetic research.

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Authors and Affiliations

Marzena Matla
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Abstract

Oil can be produced from reservoirs by use of primary methods that use natural reservoir drive, secondary methods, involving a physical displacement of oil and tertiary (enhanced), in which additional types of energy support oil recovery. About 25-35% of original oil in place for light and medium oil and about 10% heavy oil could be extracted by primary and secondary methods. Injection of CO2 into the oil fields (CO2-EOR) is one of the tertiary oil recovery method. Carbon dioxide is used for increasing oil extraction due to the fact that: to maintain reservoir pressure, reduces the oil viscosity and facilitates its movement in the reservoir, reduces density and increase the volume of oil, interacts with rocks. Depending on the oil composition and the reservoir pressure and temperature injected carbon dioxide can displace oil from the reservoir miscible or immiscible. Additional 10-20% of the oil extraction over primary and secondary methods recovery can be obtained under the miscibility conditions, in immiscibility condition additional oil production is lower. EOR method selection depends on many geological, reservoir and economic parameters. These include: density, viscosity and composition of the oil, minimum miscibility pressure, the recovery factor and vertical and horizontal reservoir variability. Using the above criteria appropriate EOR method for given oil field can be selected. The five parameters: the reservoir depth, the oil density, pressure and temperature of the reservoir is used for the selection of oil fields suitable for miscible oil displacement.

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Authors and Affiliations

Stanisław Rychlicki
Jerzy Stopa
Barbara Uliasz-Misiak
Ludwik Zawisza
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Abstract

As it is found in the related published literatures, the transfer function (TF) evaluation method is the most feasible method for detection of winding mechanical faults in transformers. Therefore, investigation of an accurate method for evaluation of the TFs is very important. This paper presents three new indices to compare the transformer TFs and consequently to detect the winding mechanical faults. These indices are based on estimated rational functions. To develop the method, the necessary measurements are carried out on a 1.3 MVA transformer winding, under intact condition, as well as different fault conditions (axial displacement of winding). The obtained results demonstrate the high potential of proposed method in comparison with two other well-known indices. Additionally, two important methods for describing TFs by rational functions are studied and compared in this paper.

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Authors and Affiliations

Mehdi Bigdeli
Mehdi Vakilian
Ebrahim Rahimpour
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Abstract

The agglomeration of particles is a process that modifies the physical properties of a product originally manufactured as a powder. During milk powder agglomeration of fluidized bed, resulting agglomerates are sufficiently porous to improve the solubility of the final product but, at the same time, their rigidity decreases and agglomerates can be destroyed during packing. The porosity and rigidity properties depend on both the volume and shape characteristics of the agglomerates. This paper presents a three-dimensional reconstruction technique based on a laser displacement sensor (LDS) applied to characterize milk agglomerates. This technique allows three-dimensional scanning to estimate particle volume and extract shape parameters such as: sphericity, elongation and flatness ratio, shape factor and aspect ratio. This technique was implemented using a mechatronic device with two degrees of freedom. The device is composed of an angular positioning system to rotate the agglomerate and a linear positioning system to displace the LDS. Experimental result allows agglomerates classification according to shape parameters

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Authors and Affiliations

J. P. Zavala De Paz
E. Castillo Castañeda
J. Soto Herrera
C. Turchiuli
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Abstract

The paper presents a technique for measuring membrane displacements with one motionless camera. The method consists in measuring the distance to an object based on one image obtained from a motionless camera with a fixed-focus lens. The essence of the proposed measurement technique is to determine changes of the distance between a membrane and a video camera based on analysis of changes in the focus view of a marker placed on the membrane plane. It is proven that the used technique allows to monitor the frequency and amplitude of the membrane vibration. The tests were performed for the oscillation frequency in the range from 0.5 Hz to 6 Hz and deviations from the neutral position in the range of ±3 mm.
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Authors and Affiliations

Krzysztof Murawski
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Abstract

This work presents the studies on the electrochemical process of thin palladium layers formation onto electrodeposited cobalt coatings. The suggested methodology consists of the preparation of thick and smooth cobalt substrate via galvanostatic electrodeposition. Cobalt coatings were prepared under different cathodic current density conditions from acidic bath containing cobalt sulphate and addition of boric acid. Obtained cobalt layers were analyzed by x-ray diffraction to determine their phase composition. Freshly prepared cobalt coatings were modificated by the galvanic displacement method in PdCl2 solution, to obtain smooth and compact Pd layer. The comparison of electrocatalytic properties of Co coatings with Co/Pd ones enabled to determine the influence of Palladium presence in cathodic deposits on the hydrogen evolution process.

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Authors and Affiliations

K. Skibińska
D. Kutyła
K. Kołczyk
A. Kwiecińska
R. Kowalik
P. Żabiński
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Abstract

The paper presents design and experimental verification of platform mechanism with cost-effective wire-based sensors for measuring of spatial displacement or pose of some moving object. This task, also known as spatial tracking, has a very wide application. The proposed mechanism, guided by the moving object, has a parallel structure with two platforms and at least six wire-based sensors for measuring distances between the platform points. Changes of the platform pose cause corresponding changes of the sensors' wire lengths. Forward position problem of an equivalent mechanism model with 6 degrees of freedom is described together with analyses of work space limitations and error propagation in a measurement system. A specific application is illustrated for tracking of a wheel knuckle of 5-link suspension mechanism used in passenger cars. The developed device has the following advantages: it can be installed in a wheel cavity; enables dynamic measurements on the road; is cost-effective. Performance of the latest prototype of the wire-based tracker was verified on the basis of measurements on a test rig, where two other measuring devices were used for comparison purposes.

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Authors and Affiliations

Marta Góra
Michał Maniowski
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Abstract

A novel type of an axial, piston-driven high pressure hydraulic pump with variable capacity marks a significant improvement in the area of the hydraulic machinery design. Total discharge from hydrostatic forces eliminates a need for a servomechanism, thus simplifying operation, reducing weight and introducing the possibility of the pump displacement control by computer. PWK-type pumps, invented in the Gdansk University of Technology, offer high efficiency for pressure levels up to 55 MPa, ability to work self sucking even at high speed. However, the heart of the new invention, the commutation unit, creates harmful pressure peaks. Those peaks can be mitigated by the introduction of a compensation chamber with elastic walls. Owing to the dynamic character of events taking place in the pump, a need for computer simulation arouse in order to understand phenomena leading to the occurrence of pressure peaks and choose compensation chamber parameters accordingly. A CFD package alone would not be sufficient to reliably represent the interaction between the compensation chamber wall and the working fluid. This paper presents Fluid Structure Interaction approach comparing 3 different models: 2 simplified models of the pump and a full pump model.

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Authors and Affiliations

Leszek Osiecki
Piotr Patrosz
Bettina Landvogt
Janusz Piechna
Tomasz Zawistowski
Bartek Żyliński
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Abstract

This study presents a possibility of detecting wear of a valve plate in multi-piston axial pump based on time-frequency analysis of measured signals. Short-time Fourier transform STFT and the generalized Wigner-Ville algorithm WVD were used for this purpose. The tests were carried out on a multi-piston axial pump with swinging plate, in which the worn valve plates were mounted. Valve plate wear was related with the formation of flow micro-channels between the pump suction hole and its pumping hole on the plate transition zone surface. The developed channels initiate flow of the operational fluid, the results of which is lack of leak-tightness between suction and pumping zones, associated with a decrease in operational pressure and drop in general efficiency.

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Authors and Affiliations

Jerzy Stojek
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Abstract

The effect of hydrogen on short-term strength, low-cycle durability and planestress fracture toughness of 10Cr15Ni27 steel, 04Cr16Ni56 and 05Cr19Ni55 alloys at pressure up to 35 MPa and temperature 293. . . 773 K was investigated. The modes of hydrogen action for which the elongation δ, reduction of area ψ, low-cycle durability N and crack resistance parameters Kc of alloys are minimal were established: hydrogen pressure above 10 MPa (non-hydrogenated specimens of 04Cr16Ni56 alloy) and above 15 MPa (hydrogenated specimens of 10Cr15Ni27 steel and 05Cr19Ni55 alloy, hydrogen concentration 15 and 19 wppm, respectively).

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Authors and Affiliations

Alexander Balitskii
Ljubomyr Ivaskevich
Volodymyr Mochulskyi
Jacek Eliasz
Oleg Skolozdra
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Abstract

In the 20th century toponymy of the Kłodzko Land underwent serious changes, which with no doubt can be called a revolution. After 1945 and the displacement of the German population all the pre-war names were substituted with Polish ones, which, unfortunately, only rarely were connected with the former tradition, in some cases as old as the middle ages. Most of new names were introduced by a special commission whose main aim was to mark that the new areas gained by Poland after the World War II (the so called Regained Territories) were successfully taken into possession. However, many places and objects (some mountain tops, rock formations, springs, parts of villages) did not receive a name. In the next decades, new local communities started to accustom the mountainous landscape and independently gave names to various nameless (in Polish) places. Unfortunately, due to the depopulation of rural areas in the Kłodzko Land and other formal reasons, the process was quite slow. The main aim of the paper is not only to analyse those changes, but also to compare the numbers of names in chosen moments of the 20th century. For this purpose three types of maps in 1 : 25 000 scale were used: pre-war (German) “Meßtischblatt”, a Polish topographic map representing the situation at the beginning of the 1970s and, finally, the “Army topographic map” from the end of the 20th century. On the first map 531 geographical names were marked, on the second — only 225, and on the third — 277, which is still approximately half of the number before 1945.

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Authors and Affiliations

Krzysztof Kołodziejczyk
Robert Szmytkie
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Abstract

The paper presents the results of research on the DiSTFA method (Displacements and Strains using Transformation and Free Adjustment) for the determination of displacement and strains of a surface determined in unstable reference systems. Additionally, covariance matrices were introduced to assess the accuracy of estimation results. The theoretical discussion includes an example of its application in a simulated, three-dimensional geodetic network. The obtained results encourage further, more detailed analysis of real geodetic networks.
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Authors and Affiliations

Waldemar Kamiński
ORCID: ORCID
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Abstract

The study presents results of the internal reliability analysis of structural modules used for the determination of horizontal displacement in incomplete trigonometric network. The influence of such elements as: number of control points, sight line length and arrangement of control points around the instrument station on reliability was analysed. Furthermore the analysis of the influence of diversification of reliability indices calculated for individual observations on the detection efficiency of non-dislocated control points was performed. The presented numerical example illustrates the possibility of incorrect valuation of control point stability because of a large diversification of reliability indices. The summary contains recommendations from the point of view of internal reliability for optimal designing of structural modules in incomplete trigonometric networks.
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Authors and Affiliations

Mieczysław Kwaśniak
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Abstract

This work proposes a systematic assessment of stereophotogrammetry and noise-floor tests to characterize and quantify the uncertainty and accuracy of a vision-based tracking system. Two stereophotogrammetry sets with different configurations, i.e., some images are designed and their sensitivity is quantified based on several assessments. The first assessment evaluates the image coordinates, stereo angle and reconstruction errors resulting from the stereophotogrammetry procedure, and the second assessment expresses the uncertainty from the variance and bias errors measured from the noise-floor test. These two assessments quantify the uncertainty, while the accuracy of the vision-based tracking system is assessed from three quasi-static tests on a small-scaled specimen. The difference in each stereophotogrammetry set and configuration, as indicated by the stereophotogrammetry and noise-floor assessment, leads to a significant result hat the first stereophotogrammetry set measures the RMSE of 3.6 mm while the second set identifies only 1.6 mm of RMSE. The results of this work recommend a careful and systematic assessment of stereophotogrammetry and noise-floor test results to quantify the uncertainty before the real test to achieve a high displacement accuracy of the vision-based tracking system.
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Authors and Affiliations

Luna Ngeljaratan
1
Mohamed A. Moustafa
1

  1. University of Nevada, Department of Civil & Environmental Engineering, Reno, NV 89557, USA
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Abstract

Reference blocks are required for ultrasonic calibration and non-destructive testing (NDT). There are already in existence sets of reference blocks constructed according to American Society for Testing and Materials standards, but as the industry evolves, we need more reference blocks with varied designs. In this study, two reference blocks of steel and aluminum are constructed. These blocks have several sets of flat bottom holes (FBH) with different diameters (0.5, 1, 1.5, 2 and 2.5 mm), angles (45° and 90°) and placements. The novel constructed reference blocks are evaluated using the ultrasonic and a displacement measuring interferometer (DMI). They allow for detailed FBH characterization in terms of defining their location, diameter, depth and so on. The two techniques show consistency in the majority of the outcomes. The expanded uncertainty of readings is found to be ± 1.4 µm, according to DMI data. The findings show that the newly constructed blocks could be ideal for evaluating a variety of calibration factors including transducer sensitivity, dead zone, defect size, and depth. Furthermore, they can be used in NDT in various industries such as petroleum pipe production, steel manufacturing and so on.
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Authors and Affiliations

Mirham A.Y. Barakat
1
Mohamed Abdelwahab
2
Alshaimaa Waheed Abdallah
2

  1. Ultrasonic Metrology Laboratory, National Institute of Standards PO Box: 136, Giza code 12211, Tersa Street, Haram, Giza, Egypt
  2. Line & End Secondary Standards Laboratory, National Institute of Standards PO Box: 136, Giza code 12211, Tersa Street, Haram, Giza, Egypt
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Abstract

The work concerns the influence of the method of numerical modelling of the connections of the roof truss and vaults with the walls of historic masonry objects structures on the local stress distribution in the walls. At the outset, the need to search for rational modelling was justified due to the large size of the calculation models and the erroneous results obtained with oversimplification of the model. Four methods of modelling the connections between the walls and roof truss and vaults were analysed. The first method was to describe the elements of walls and foundations as solid elements, the ribs of the vaults and the roof truss as beam elements, and the vaulting webs as shell elements. The remaining methods 2–4 describe the walls as shell elements. In places where the walls join with the roof truss and vaults, fictitious/fictional elements in the form of rigid horizontally-oriented shells were used in model No. 2. In model No. 3, fictitious rigid horizontally-oriented shell elements in addition to local rigid vertically-oriented shells were used, while in model No. 4, only fictitious rigid vertically-oriented shell elements with stepwise decreasing protrusions were introduced. The best solution in terms of local stress distribution turned out to be the description of connections with fictitious shell elements in the case of model No. 4. This approach slightly increases the number of unknowns, and makes the results of stresses in the connection areas realistic in relation to full modelling with solid finite elements.
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Authors and Affiliations

Czesław Miedziałowski
1
ORCID: ORCID
Marcin Szkobodziński
2
ORCID: ORCID
Krzysztof Robert Czech
1
ORCID: ORCID

  1. Bialystok University of Technology, Faculty of Civil Engineering and Environmental Sciences, Wiejska 45A, 15-351 Bialystok, Poland
  2. Energoprojekty sp. z o.o., Opolska 15, 15-549 Bialystok, Poland
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Abstract

In this paper, the author proposed a new method for determination of vertical displacements with the use of hydrostatic levelling systems. The traditional method of hydrostatic levelling uses a rule in which a position of reference sensor is stable. This assumption was not adapted in the proposed method. Regarding the issue mentioned above, the reference sensor is treated in the same way as the others sensors that measure the liquid level. As a consequence of this approach there is a possibility of vertical displacement determination of both the reference sensor as well as the remaining controlled sensors. A theoretical considerations were supplemented with the practical examples. The possibility of calculating the vertical displacement of reference sensor is an undoubted advantage of the submitted proposal. This information enables more detailed interpretation of the vertical displacements results obtained from hydrostatic levelling systems. Thus, wider knowledge about maintenance of the entire examined object treated as the rigid body is obtained. The tests that were carried out confirm the theoretical assumptions and encourage to perform further, more precise empirical analyses.
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Bibliography

[1] P. Bestmann, C. Barreto, C. Charrondiere, “Hydrostatic Levelling System Going Mobile”, in Proceedings 14 the International Workshop on Accelerator Alignment, 3–7 Oct 2016, Grenoble, France. 2016, pp. 1–6. [Online]. Available: https://inspirehep.net/literature/1722424. [Accessed: 2.02.2021].
[2] O. Burdet, “Experience in the Long-Term Monitoring of Bridges”, in 3rd fib International Congress (No.EPFLCONF163103). Washington DC, USA, 2010, pp. 108–113. [Online]. Available: https://infoscience.epfl.ch/record/163103. [Accessed: 2.02.2021].
[3] D. Filipiak–Kowszyk, W. Kaminski, “Determination of vertical displacements in relative monitoring networks”, Archives of Civil Engineering, 2020, vol. 66, no. 1, pp. 309–326, DOI: 10.24425/ace.2020.131790.
[4] H. Friedsam, J. Penicka, J. Error, “Deformation measurements at the vehicle tunnel overpass using a hydrostatic level system”, International Nuclear Information System, Report Number LS-255(ANL), University of North Texas Libraries, UNT Digital Library, 1996, pp. 1–14, DOI: 10.2172/399677.
[5] W. Habel, H.Kohlhoff, J. Knapp, R. Helmerich, “Monitoring System for Long-termevaluation of prestressed railway bridges in the new Lehrter Bahnhof in Berlin”, in Third World Conference on Strucutral Control, 7-12.4.2002, Como, Italy, 2002, pp. 1–6.
[6] W. Kaminski, “The Idea of Monitoring Surface Deformations on Unstable Ground with the Use of GPS Technology”, Bolletino di Geodesia e Scienze Affini, 2008, vol. 1, pp. 33–45.
[7] W. Kaminski, “The Conception of Monitoring the Superficial Deformation Located on theUnstable Foundation with the Usage of GPS Technology”, presented at 13th FIG International Symposium on Deformation Measurements and Analysis, 4th Symposium on Geodesy for Geotechnical and Structural Engineering, Lisbon, May 12–15, 2008.
[8] W. Kaminski, “Properties and analysis of the accuracy of estimation results obtained by the DiSTFA method in monitoring displacements and strains”, Geodesy and Cartography, 2009, vol. 58, no. 2, pp. 37–50.
[9] W. Kaminski, K. Makowska, “The Concept of Geodetic Analyses of the Measurement Results Obtained by Hydrostatic Leveling”, Geosciences, 2019, vol. 9, no. 10, pp. 1–12, DOI: 10.3390/geosciences9100406.
[10] D. Martin, “Deformation movements observed at the European Synchrotron Radiation Facility”, in Proceedings of The 22nd Advanced ICFA Beam Dynamics Workshop on Ground Motion in Future Accelerators, SLAC, Stanford University USA, 2000, pp. 341–357. [Online]. Available: https://www-project. slac.stanford.edu/lc/wkshp/gm2000/proceedings/article25.pdf. [Accessed: 2.02.2021].
[11] E. Meier, A. Geiger, H. Ingensand, H. Licht, P. Limpach, A. Steiger, R. Zwyssig, “Hydrostatic levelling systems: Measuring at the system limits”, Journal of Applied Geodesy, 2010, vol, 4, no. 2, pp. 91–102, DOI: 10.1515/jag.2010.009.
[12] L. Schueremans, K. Van Balen, P. Smars, V. Peeters, D. Van Gemert, “Hydrostatic Levelling System – monitoring of historical structures”, in Structural Analysis of Historical Constructions, P.B. Lourenço, et al., Ed., New Delhi, 2006, pp. 529–536.
[13] L. Schueremans, K. Van Balen, K. Brosens, D. Van Gemert, P. Smars, “Church of Saint-James at Leuven – structural assessment and consolidation measures”, International Journal of Architectural Heritage, 2007, vol. 1, pp. 82–107, DOI: 10.1080/15583050601126137.
[14] B. Szabo, J. Brzeski, J.M. González, “Use of linked monitoring systems for asset protection at finsbury circus during scl tunnelling for crossrail station”, Crossrail Learning Legacy, 2015. [Online]. Available: https://learninglegacy.crossrail.co.uk/documents/use-linked-monitoring-systems-asset-protection-finsbury-circus-scl-tunnelling-crossrail-station-2/. [Accessed: 2.02.2021].
[15] K. Wilde, M. Meronk, M. Groth, M. Miskiewicz, “Structure monitoring by means of hydrostatic levelling” (in Polish), in 27th Scientific Technical Conference on Building failures, 2015, pp. 278–284.
[16] Z.Wisniewski, “The idea of determination of parameters of location and shape of fundamental plates on the basis of free leveling”, in Materials from VI Scientific-Technical Session Current Scientific and Technical Problems of Geodetic Works, Gdansk –Sobieszewo, 6–7 October 1989 (in Polish). Gdansk, 1989.
[17] V.V. Yepin, R.V. Tsvetkov, I.N. Shardakov, A.P. Shestakov, “Estimation of hydrostatic level parameters for measuring vertical displacement fields of structures on a test stand”, AIP Conference Proceedings, 2018, vol. 2053, pp. 1–6, DOI: 10.1063/1.5084542.
[18] X. Zhang, Y. Zhang, L. Zhang, G. Qiu, D. Wei, “Power Transmission Tower Monitoring with Hydrostatic Leveling System: Measurement Refinement and Performance Evaluation”, Hindawi. Journal of Sensors, 2018, article ID 4176314, pp. 1–12, DOI: 10.1155/2018/4176314.
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Authors and Affiliations

Waldemar Kamiński
1
ORCID: ORCID

  1. Faculty of Civil and Environmental Engineering, Gdansk University of Technology, ul. Gabriela Narutowicza 11/12, 80-233 Gdansk, Poland

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