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1.
METODE GEODETSKEGA MONITORINGA V GRADBENIŠTVU
Nina Štumberger, 2009, diplomsko delo

Opis: Diplomska naloga pokriva problematiko sledenja (monitoringa) objektov in tal pred gradnjo, med njo in po končani gradnji. Glavni cilj naloge je prikazati metode ter poiskati povezavo med geodetskimi metodami, uporabnimi v gradbeništvu. Opisane so različne metode opazovanja pomikov in deformacij ter instrumenti, ki jih uporabljamo pri opazovanju, odvisno od objekta in terena, ki ga opazujemo. Podrobno je opisana metoda Global Positioning Sytema, nam znanega kot satelitskega opazovanja. Mnenja in predlogi so podani v zaključku diplomskega dela.
Ključne besede: geodezija, geodetski monitoring, GPS, pomiki
Objavljeno: 23.12.2009; Ogledov: 2723; Prenosov: 283
.pdf Celotno besedilo (4,29 MB)

2.
MERITEV VERTIKALNIH POMIKOV MOSTU S POUDARKOM NA ODKRIVANJU DEFORMACIJ
Matej Košuta, 2009, diplomsko delo

Opis: Tema diplomske naloge obravnava različne metode meritev posedkov pri gradnji mostov. Iz dobljenih rezultatov bomo odkrili vzroke pomikov katerih posledica so deformacije. Osredotočili se bomo na konstrukcije velikih razponov, kjer so pomiki večji in metode meritev zahtevnejše. Prvi del diplomske naloge sestavlja teoretični del, kjer bom opisal in predstavil različne definicije razvoja monitoringa in geodetskih instrumentov, ki so v uporabi. V praksi obstaja več metod meritev, katere bom opisal, podrobneje pa pregledal geodetske metode. Drugi del diplome sestavlja praktični del, kjer bomo predstavili rezultate meritev in opazovanj sprememb objekta Most čez reko Dravo v Malečniku, kjer se bo položil zaključni obrabni sloj voziščne konstrukcije, prav tako se bo izvedel končni obremenilni preizkus, kjer se bo ugotovila skladnost med teoretičnim izračunom vrednosti pomikov in izmerjenimi.
Ključne besede: geodezija, gradbeništvo, monitoring, posedki, geodetske meritve
Objavljeno: 23.12.2009; Ogledov: 2274; Prenosov: 149
.pdf Celotno besedilo (3,12 MB)

3.
GNSS MONITORING V CESTOGRADNJI
Mateja Zlatinek, 2011, diplomsko delo

Opis: Diplomsko delo predstavlja trenutno stanje GNSS monitoringa, navigacijo s tehnologijo GNSS in opisuje GPS navigacijske instumente. Navigacijski sistemi običajno temeljijo na sprejemnikih GNSS. Geodetske metode so eden od možnih načinov za ugotavljanje stabilnosti geotehničnih objektov. Pričakovana velikost premikov določa potrebno natančnost določitve premikov, velikost objekta pa določa metodo geodetske izmere. V osnovi izbiramo med terestričnimi metodami in metodami GNSS. V nalogi so opisane tudi različne metode opazovanja premikov in deformacij, kot tudi instrumenti, ki jih uporabljamo pri opazovanju objekta samega. Drugi del diplomske naloge sestavlja praktični del, kjer sem opisala GNSS monitoring v cestogradnji na primeru viadukta Boršt 1.
Ključne besede: GNSS, monitoring, geodetske meritve, pomiki, deformacije
Objavljeno: 10.01.2011; Ogledov: 2265; Prenosov: 350
.pdf Celotno besedilo (4,57 MB)

4.
Modern deformation measurement techniques and their comparison
Boštjan Kovačič, Rok Kamnik, Miroslav Premrov, Nenad Gubeljak, Jožef Predan, Zdravko Tišma, 2008, pregledni znanstveni članek

Opis: Deformation measurement experiment has been undertaken where a concrete structure was subject to controlled loading. Concrete plate was loaded with hydraulic cylinder PZ 100 up to 42 kN. Nikon total station ser. 720 and camera Fuji Pro S3 have been used to make measurements at critical points during each additional load. A hydraulic computer operated cylinder was used for load increase. The use of total stations for deformation measurements is quite often, but the combination with digital photography is rather new and very suitable technique. It offers the capability of simultaneous monitoring of a large number of signalized or non-signalized points with very low root mean square error of 0.16 mm in geodetic method 0.7 mm in photogrammetry, respectively. The concrete plate was modeled and the comparison with the geodetic, photogrammetric and hydraulic method was made.
Ključne besede: deformation measurements, geodesy, digital photogrammetry
Objavljeno: 31.05.2012; Ogledov: 1418; Prenosov: 30
URL Povezava na celotno besedilo

5.
Mathematical analysis of measured displacements with emphasis on polynomial interpolation
Boštjan Kovačič, Rok Kamnik, Zdravko Kapović, 2009, izvirni znanstveni članek

Opis: At the Faculty of Civil Engineering, the University of Maribor, in the Centre for Geodesy, we have been primarily dealing with the study of displacements and application of results on deformations and mathematical analyses for the last 10 years. According to these results, we wanted to find a connection between displacements and resulting deformations in mathematical terms. For this purpose, experimental load-bearing test of a concrete girder was carried out step by step up to crack. Additionally, concrete girder was analytically modelled and also photogrammetric, geodetic, and physical methods were compared. During the process of analyzing the results, further polynomial interpolation was performed through which the displacements in the intermediate stages were calculated. Polynomial interpolation can also help in accomplishment of load-bearing experiments of larger structures.
Ključne besede: geodesy, vertical movement, deformation, mathematical analysis
Objavljeno: 31.05.2012; Ogledov: 914; Prenosov: 7
URL Povezava na celotno besedilo

6.
GEODETSKA DELA PRI PROJEKTIRANJU IN GRADNJI PREDOROV
Anamari Podergajs, 2012, diplomsko delo

Opis: Geodetska stroka je pri projektiranju, gradnji in uporabi predorov nenadomestljiva. Še posebno pri geološko nestabilnih tleh se pokaže pomembnost vloge geodezije, saj so konstantne kontrolne meritve za stabilno izgradnjo predora neizogibne. V teoretični del diplomske naloge opredeljuje osnove in postopke potrebnih geodetskih del v celotnem ciklusu gradnje predorov. Kritičen del predstavlja natančnost pri preboju, zato je njej potrebno posvetiti posebno pozornost. Opisane in primerjane bodo različne tehnologije gradnje ter geotehnične raziskave in njihov pomen. Praktični del prikazuje potek kontrolnih meritev pomikov na betonskem okvirju za potrebe gradnje predora med Medicinsko fakulteto in Univerzitetnim kliničnim centrom Maribor.
Ključne besede: geodezija, predori, geodetska mreža, kontrolne meritve, prečni profili
Objavljeno: 17.12.2012; Ogledov: 1298; Prenosov: 320
.pdf Celotno besedilo (3,47 MB)

7.
Vertical displacements measuring methods during bridge load tests
Boštjan Kovačič, Ante Marendić, Rok Kamnik, Mikhail Volkov, Vera Roy, 2016, objavljeni znanstveni prispevek na konferenci

Opis: This article introduces the use of the GNSS method for the load testings of bridge structures. We know that there area lot of methods by which you can determine vertical displacement. However, as new bridge constructions are constructed over almost impossible and inaccessible gorges and valleys, the classic measurements method do not allow us to determine vertical displacement so reliably any more or they are very time-consuming. The GNSS method is well known but there are difficulties when determining the altitude component of this method, which is rather questionable. For this purpose, the methods were tested as practical examples in which some difficulties were encountered, so subsequently another test recording was performed of altitude changes using this method.
Ključne besede: bridges, measurements, strain gauge, load test, deformation, strain, signal processing
Objavljeno: 29.08.2016; Ogledov: 570; Prenosov: 174
.pdf Celotno besedilo (1,55 MB)
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8.
Buckling behavior of cold-formed studs with thermal perforations
Marsel Garifullin, Alexey Sinelnikov, Maria Bronzova, Boštjan Kovačič, Rok Kamnik, 2016, objavljeni znanstveni prispevek na konferenci

Opis: Studies have shown that the optimal structural scheme for low-rise buildings that meets all regulatory requirements is a frame system. In this connection, thin-walled cold-formed steel (CFS) profiles seem to be the best material for constructing light steel framed (LSF) walls. The framework of LSF walls is usually constructed from CFS C-shaped profiles. To increase the thermal effectiveness of a wall, CFS profiles usually have thermal perforations and thus are called thermoprofiles. However, these openings have a negative impact on bearing capacity of profiles and require accurate evaluation. In this article a relatively new reticular-stretched thermoprofile with diamond-shaped openings is considered. The article deals with the buckling analysis of perforated CFS C-sections subjected to compression.
Ključne besede: structural engineering, steel structures, computer simulations, nonlinear model
Objavljeno: 29.08.2016; Ogledov: 487; Prenosov: 208
.pdf Celotno besedilo (2,85 MB)
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9.
Deformation analysis of bridges in exceptional transport in Slovenia
Rok Kamnik, Boštjan Kovačič, Andrej Štrukelj, 2010, kratki znanstveni prispevek

Opis: In August 1999 an exceptional transportation of two steamers of 666 tonnes was performed from the Port of Koper to the Nuclear power plant in Krško. The transport covered a distance of about 200km and represented one of the largest exceptional transports in Slovenia ever. Finding the best route represented one of the major issues, because the steamers had to cross more than 50 problematic sections and bridges, most of which have not been designed for such heavy loads. It was necessary to load-test almost all bridges on the route to determine whether those bridges need any extra supports or not. Consequently, a logistic operator has an important and indispensable role and becomes a co-modeller of logistic service. A deformation analysis or a polynomial interpolation of vertical displacements could also be used. Therefore, a laboratory load test of a concrete plate was made. The concrete plate was loaded with hydraulic cylinder PZ 100 with extensiometer up to 21kN. Every increase of load by 3kN was measured with Nikon Ser 800 total station.
Ključne besede: deformation analysis, exceptional transport, bridges, Slovenia
Objavljeno: 01.06.2017; Ogledov: 342; Prenosov: 34
.pdf Celotno besedilo (925,47 KB)
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10.
The different methods of displacement monitoring at loading tests of bridges or different structures
Boštjan Kovačič, Rok Kamnik, Andrii Bieliatynskyi, 2016, objavljeni znanstveni prispevek na konferenci

Opis: By measuring the displacements and deformations at different structures we deal in the Faculty of Civil Engineering, transportation Engineering and Architecture in University of Maribor for about 20 years. At that time we measured over 600 structures. Most loading tests of bridges and Viaducts were made. The measurements of movements needed to be as precise and accurate as possible. To do that laboratory test of instruments were made to see which instrument gives us reliable results. Displacements can be determined by geodetic and physical methods, depends of the construction. The use of geodetic methods are still preferable. In the paper the measurements with the total station, the level and rotation level, photogrammetry and solutions on the field by physical methods with inductive transducers are presented. We need to measure displacements as quick as possible but efficiently because we can not repeat the measurements under the same conditions. Also the surveying on the bridge and in the lab with the comparison of methods is presented under the different hard terrain conditions - water beneath the construction, big height of the structure, unapproachability, large span structures.
Ključne besede: bridges, measurements, strain gauge, load test, deformation, strain, signal processing
Objavljeno: 02.08.2017; Ogledov: 326; Prenosov: 135
.pdf Celotno besedilo (3,15 MB)
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