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Analysis of the use of the national orthophoto and topographic database in large scale for the purposes of spatial planning
Full text linkTo produce high-quality spatial documents in spatial planning it is necessary to use\ud
appropriate and high-quality spatial data. Among the most used and useful data resources are\ud
the national orthophoto and national topographic database (DTK 5), which are used as the\ud
basic input data for the commencement of producing professional bases and spatial analysis\ud
and are provided by the Surveying and Mapping Authority of the Republic of Slovenia. Over\ud
the years the spatial data have become available and reliable, but a spatial planner should\ud
know their limitations for certain purposes of use. We used a variety of analytic methods for\ud
analyzing orthophoto and topographic data (DTK 5). We also concluded a survey that\ud
presented the usage, advantages and disadvantages of using mentioned spatial data in spatial\ud
planning based on the user experience of data usage. Based on the acquired responses to the\ud
survey and research work we also concluded a critical assessment of object catalog DTK 5\ud
and made suggestions for its improvement
Automatic differentiation based solution of strongly coupled problems in engineering
Full text linkThe doctoral thesis presents an approach for the formulation and solution of strongly coupled\ud
engineering problems with the finite element method using the automatic differentiation technique that\ud
the software tools AceGen and AceFEM enables. It has been shown that it is possible to transform arbitrarily weak form of differential equation of coupled problems into scalar function pseudo-potential. By using the automatic differentiation and appropriate exceptions in the differentiation procedure, the equations of the problem and the consistent tangent matrix of finite element can be automatically derived from the pseudo-potential, which ensures quadratic convergence of the Newton-Raphson iterative procedure. At the same time such formulation of the problem leads to an extremely fast and accurate finite element codes. With a large number of physical fields we are faced with the problem of increasing size of element software code with each added field. The problem was solved by additive split of the total problem to individual subproblems, for which the code is derived inside separate final element in a manner that preserves the quadratic convergence of the Newton-Raphson iteration. It has been shown on the numerical examples of the thermo-hydro-mechanical problems that separate formulation is suitably efficient compared to the unified formulation. The separate formulation of finite elements is a property of sequential approach. Therefore, we have shown on several examples that unified solution of the full system is more efficient than sequential solution procedure. Additionally, a new approach to the evaluation of matrix functions is presented. These are necessary for the formulation of non-linear mechanical problems, such as certain hyperelastic models (e.g. Hencky and Ogden models) and the exact evolution of plastic flow in the case of large deformations. A new method of automatic derivation of an arbitrary matrix function and its first and second derivatives of the matrix of dimensions 3 _ 3 with real eigenvalues is presented. The described method provides an alternative to the formulations based on the eigenvalues, because the generating function is stable and smooth compared to the eigenvalues. The generating function is a function\ud
of the eigenvalues of matrix. Therefore it is expanded into power series in the vicinity of multiple\ud
eigenvalues. A library of subroutines which calculate the standard matrix functions in closed form was\ud
created. Thus, matrix functions can be considered as elementary functions when formulating problems. We have shown on individual matrices and various combinations of hyperelastic and elasto-plastic models that the derived matrix function and its derivatives are accurate and precise, and the formulation is efficient.\u
Hydrological analysis of floods for the Ljubljanica river basin
Full text linkLjubljansko barje is the largest floodplain in Slovenia. Heavy rainfall in predominantly karst\ud
catchment area of Ljubljanica river instigate flooding of Ljubljansko barje, caused by river\ud
Ljubljanica and its torrential tributaries such as Iška at the south side and Gradaščica at the\ud
north side of Ljubljansko barje. On the one hand, flooding of Ljubljansko barje is beneficial to\ud
the city of Ljubljana as it lowers the risk of flooding in the city, while on the other hand, it\ud
poses danger to the inhabitants of settlements of Ljubljansko barje. This thesis analyses\ud
hydrology of the largest floods of Ljubljansko barje since the beginning of the 20th century,\ud
such as floods in 1926, 1933 and 2010.\ud
Analysis results indicate that flooding of Ljubljansko barje occurs in combination with highintensity\ud
precipitation that lasts for couple of days. Flooding of this area can also occur after\ud
longer periods of lower-intensity precipitation followed by precipitation of higher intensity due\ud
to lower water retention capability of catchment area of Ljubljanica. Flooding of river\ud
Ljubljanica on Ljubljansko barje initiate gradually and last for several days or even few\ud
weeks. On the contrary, flash floods are characteristic of torrential tributaries Gradaščica and\ud
Iška. Main causes of flooding of Ljubljansko barje are quantity and duration of precipitation\ud
and high antecedent precipitation index. Results show that floodings of Ljubljansko barje\ud
usually occur in autumn. Trends in seasonal precipitation and continuous settlement of the\ud
ground of Ljubljansko barje indicate severer effects of flooding in this area in the future
Conceptual design of quay wall for pier III of Port of Koper
Full text linkThe main topic of this graduation thesis is a design for construction of pier III at the Port of Koper. More precisely, my attention has been focused on the southern part of the pier which it only is to be designed for the purposes of the port. The first part of the thesis presents a theoretical basis for designing the construction of the future pier. The specific purposes of a particular part of the pier, their geometrical assumptions and other requirements related to the installation into the surroundings, are determined by the National Spatial Plan. Geomechanical characteristics of the seabed composition and cross section of the port taken from existing geomechanical measurements are to be used to make a computer seabed model in Plaxis program. The selection of the pier type construction is based on these results. Two types of pier structure have been selected as suitable: one type is a relieving platform whose basic concept is transferring a\ud
horizontal back pressure through deep foundations, e.g. piles and the other is an open berth. The design consists of a concrete platform and deep foundations on piles. Both types have also been compared interms of implementation costs per metre. The cost of Pier III construction works for both types has also been estimated
Determination of the addition constants mini prism GMP 111
Full text linkThe market is full of geodesic equipment manufacturers, each with various claims as to the accuracy of their products. In the scope of this thesis, we have measured the addition constant of three GMP 111 mini prisms, and examined how accurate the manufacturer's claims are. The thesis also presents electronic distance measurers and reflectors. Various different errors, which affected the quality of the measurements, are detailed in the thesis. Its core consists of the analysis of the addition constant. The measurements were done both indoors and outdoors. We made three series of measurements for each prism over three different distances; those were the source of my results. These were then compared with the manufacturer's claims and were analysed in the conclusion
Behaviour of modular unit corner subjected to flexural load
Full text linkThe present master thesis discusses the performance of modular unit ceiling corner under flexural load. For this reason a numerical model was developed in the program Abaqus as well as verified with experimental tests, performed at the Slovenian National Building and Civil Engineering Institute (ZAG). Test samples were loaded with axial force as well as vertical force at the end of the profile, causing bending moment in the ceiling corner. A single-axe tensile test was also made for the needs of numeric analysis, where actual tensile strengths of steel S235JR, S355JR and S355MC were used in the test samples. On the basis of the developed numeric model a parametric analysis was performed, testing the influence compressive load level has on the bending performance of modular unit corner. By using various means to intensify ceiling corner, its load capacity and stiffness have been improved. The final part of the thesis presents the allocation of forces in screws and the influence of additional switch tin plates on the load capacity of bolting joint. It has been proven that the actual allocation is quite different to its constructed value
Cost and time analysis of a project for the construction of a kindergarten
Full text linkThe thesis will present a concrete project for the construction of kindergarten. Typical phases of construction projects will be analyzed and presented, with a focus on cost and time analysis. On this basis the final findings and suggestions for possible changes and improvements in the phase of organization and management of the project will be given
Orthophoto quality assessment from field measurments performed under the viaduct Verd
Full text linkThe aim of the thesis is to estimate the quality of data from various geodetic databases. We have\ud
compared positions and elevations of discrete points from geodetic GNSS positioning to those\ud
acquired from orthophoto and national digital elevation model. Field measurements have been\ud
performed under the Verd viaduct and in the surrounding area. The first part of the thesis consists of\ud
the theoretical framework with an emphasis on the orthophoto, the digital elevation model (DMV 5)\ud
and GNSS surveying description. The second part is practical and includes description of RTK as well\ud
as combined GNSS and classical positioning we have used for positioning. Further we have compared positions from orthophoto and from GNSS surveying as well as heights, obtained from GNSS and the national digital elevation model DMV 5 interpolation. In addition to the numerical values we have used graphical elements to depict the differences in the positions and in heights separately. The thesis concludes with the main findings and recommendations for further research work
Fire protection of steel structures
Full text linkGraduation thesis presents behavior of steel structures and structural elements under the influance of fire. The main focus in this work was to present all the methodes of fire protection for steel structures that are current in the market and to show all advantages and disadvantages for each fire protection system. In addition fire protection systems for plumbing penetrations are also presented, which have important role in providing sufficient fire resistance of the buildnigs. The thesis also present an example of designing fire protection for the steel column HEB 180 in accordance with European Standard Eurocod 3 – Part 1-2: General rules – Structural fire design [SIST EN 1993-1-2]. In the end of the thesis there is an overview of the standards for structural fire design