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Evaluation of crack depth in concrete using Impact Echo method
Get PDFThe main part of the master thesis is related to an evaluation of a crack depth in concrete by using a non-destructive method called Impact Echo. The theoretical background of the wave propagation in elastic solids and the related finite element method are presented. In the experimental work we performed measurements on two sets of cracks. The first set consisted of four vertical cracks of different depths: 149 mm, 119 mm, 88 mm and 58 mm. The second set consisted of cracks of specific configurations. We used the experimental procedures described in the book [1]. For a crack depth of 149 mm a numerical simulation was done by using the finite element method and Abaqus computer code. Comparison of the experimental and numerical results is presented in the tables and graphs. The numerical simulation accurately predicts the results
Conceptual design of Sokolski dom renovation
Get PDFThe theme of this thesis is devoted to Sokolski dom in Ljubljana and its renewal, which falls under the secular architectural heritage. The selected restoration works do not intervene with the structure of the building, so a building permit is not neede. We want to refurbish the appearance of a building and extend its lifetime. Modernization, such as the installation of new thermal insulation composite windows, must be carried out with scrutiny and not at the expense of the destruction of the original architectural design. This means that we take the suggested implemented measures into conjoined account with the law of protection of cultural heritage. ZVKDS issues the cultural renovation conditions and then a cultural consensus for proposed renovation work. The measures selected for the renovation works are accurately described, in particular facade work, carpentry and roofing are the most demanding and consequently represent the greatest expense. These works require a lot of precision and are time-consuming, mainly because the use of modern construction practices is limited in dealing with cultural heritage. Although the inventory part contains a large array of possible works, older buildings still present a large likelihood of unforeseen costs. The result is a recapitulation of the census and represents the basis for further decisions on the extent of recovery of the hall Tabor
Comparative analysis of the energy explotation potential of the Kokra river section
Get PDFExploitation of hydropower energy in Slovenia represents a significant share in securing the power supply, produced from renewable energy sources (RES). Most of this energy is obtained by hydropower plants in the major Slovenian rivers, but part of production goes to smaller units, or so-called small hydropower plants (SHPs). Many river in Slovenia are appropriate for SHPs. One of these, with high hydropower potential, is Kokra. In the present work options of hydropower uses on the selected section of the river Kokra are described. SMART Mini-Idro program was used to analyze the production of electric energy. Two implementation options of SHPs are presented, considering the penstock, together with the available amount of water. First implementation option addresses the energy use of the entire section, using one SHP with long penstock.Use of multiple SHPs with short penstock is given in the second implementation option. Spatial data and considered penstock length were used to determine the locations of SHPs. Considering the size of the catchments and ecologically acceptable flow, available amount of water for each sampling site was calculated. A comparative analysis of both options is also given
DTK 5 and DMV 5 data comparison according to the positions from combined GNSS and classical geodetic measurements at the area of forest roads
Get PDFIn the following diploma thesis, we compared the data from the database DTK 5 with the data from field measurement by GNSS in a selected area of forest roads of Šišenski Hill. Since the terrain measured by GNSS enables the determination of the 3D position of points, we also made a parallel comparison of heights, so that we were able to compare the interpolated heights measured by DMV 5 with the heights obtained from GNSS field measurement. The measurement was carried out in rather unfavourable conditions for GNSS and during the measurements we also compared the ability to determine positions of points with the instruments Leica Viva GS15 and Javad Triumph-LS. Despite difficult conditions, at the time of still incomplete greening of deciduous forest, we were successful at determining the position of plurality of points with usage of instrument Javad Triumph-LS. With the usage of instrument Leica Viva GS15 we were less successful. Therefore, we determined the points’ positions with a combination of GNSS and classical geodetic measurements. At the given test area, we discovered that the deviations in the horizontal plane according to DTK 5 and height deviations according to the DMV 5 are higher in areas with high vegetation. Positional differences in areas without vegetation were much less obvious
Role of Internal Documentation in the Construction Process
Get PDFThe thesis is addressing management of different stages of construction processes for larger\ud
construction companies, capable of managing construction process for larger and more\ud
demanding project. In these cases the internal organization framework and distribution of work\ud
among different departments of construction company is increasingly important with the scale\ud
of construction project.\ud
Internal processes of construction project management, which are based upon the project\ud
management approach including the domain knowledge have to be well defined. Engaged\ud
experts have to perform their tasks in assigned processes following the defined quality, time and\ud
scope definitions of the processes. Performance of the activities has to be demonstrated and\ud
defined with adequate documents.\ud
For the management of construction project adequate internal documentation management\ud
framework is therefore essential. It is prepared by the experts working in different departments\ud
of construction company following the defined project line. It is following the main stages of\ud
project development: bidding process and contracting, project activation, project\ud
implementation and project closure with testing and final delivery. This internal documentation\ud
is closely interrelated with external documentation which is obtained mainly by the client.\ud
Internal documentation also has a role to amend the external documentation and correct its\ud
inconsistencies along with the project development, following at the same time contractual and\ud
legal requirements. Its role is especially essential for the effectiveness and efficiency of\ud
construction company itself and related profits of the project and company.\ud
In the thesis internal documentation related to the key stages of construction project\ud
development was analysed with examples of the key internal documentation. Examples of five\ud
internal construction project closure documents integrating key information on construction\ud
project are demonstrated and analysed.\ud
The analysis is confirming the importance and the role of the internal construction project\ud
documentation which has, together with other expert knowledge and processes, a pivotal\ud
position in the efficiency of construction project and construction company
Analysis of global, European and national geoid models at the territory of Slovenia
Get PDFThe thesis discusses the comparison of two geoid models for the area of Slovenia, the official model SLOAMG2000 and the test model SLOAMG2010, and the global geoid model EGM08. The precision and compliance analysis in the area of Slovenia has been carried out based on 1200 GNSS/levelling points with defined altitude and ellipsoidal height. The analysis has shown that the best results for Slovenia are given by the test model of the Slovene geoid SLOAMG2010, and the worst results by the global geoid model EGM08
Comparison of TPS and TLS measurements of geodetic net Bavarski dvor
Get PDFTerrestrial laser scanning is a new technology which is in recent times more commonly used in geodesy. The possibilities of this technology in geodesy are therefore not yet widely known. That is why we compared this technology with the verified technology of a classical geodetic terrestrial survey. The test field was the geodetic grid for the observation of the stability of the construction pit in Bavarski dvor. The grid of measurement points was measured with a precise total station and a terrestrial laser scanner. The coordinates of discreetly measured points were gathered with a separate adjustment of the horizontal and vertical grid. The coordinates of points that were measured with the laser scanner were only available in the coordinate system of the scanner. To be able to compare the results, they first had to be transformed into a local system of a terrestrial grid of the construction pit
Apartment and residential buildings rent analysis in the Slovenian coastal municipalities
Get PDFThe thesis analyzes apartment and residental buildings rents in the Slovenian coastal municipalities. In the begining of the thesis, theoretical basis and definitions regarding rental housing and tenancy are presented. The main part of the thesis is composed of the market rent analysis results for rental apartments with a net floor area between 20 m2 and 200 m2 and residental buildings with net floor area of more than 50 m2. Apartment and residental buildings rents are divided into two types: actual market rents and non-profit rents. Results of the analysis are showing that the average market and non-profit rents per unit for apartments and residental buildings are highest in the municipality of Piran. The results also showed that actual market rent per unit for apartments is approximately 50 % higher than non-profit rent per unit for apartments in the Slovenian coastal municipalities
Smart pedestrian crossings
Get PDFDissertation presents smart pedestrian crossings which could be installed in road infrastructure in the future. Because of too frequent road accidents in the areas of road crossings and heightened regulations on harmful emissions and annual increasing of traffic, smart pedestrian crossings are appropriate solution, which is used by many of countries throughout the world. The fact that in Slovenia the preposition for the technical specifications of crossings is still in preparation is responsible for many imperfections of road crossings for pedestrians.\ud
The dissertation shows the behavior of pedestrians at traffic light controled pedestrian crossing. The observations are based on an online survey and observation of the four test fields. I made the conclusions by observing the behaviour of pedestrians on the test fields, that with the future smart pedestrian crossings we could reduce time losses and if the traffic light is completed with time counter, then this affects the safety of pedestrians. Based on findings I confirmed two of three hypothesis
The influence of steel fibres on bond between rebar and normal strenght concrete
Get PDFThe thesis examines the influence of steel fibres on the bond strength between a reinforcing steel bar with a diameter of 20 mm and standard-strength concrete with a water-binder ratio of 0.52 and the influence of steel fibres on the compressive strength of different types of concrete. The types of concrete researched contained an identical amount of steel fibres and only differed in type of cement used. The control concrete contained no steel fibres. Three types of cement were used, differing from each other in the amount of cement clinker. The standard cement contained 65% of clinker, the special cement contained 80% and the pure Portland cement contained 95%. The basic formulations of the mixfures were based on the formulations from Drago Saje’s doctoral thesis from 2001. Appropriate standard tests were also carried out on fresh concrete. We have found that the effect of steel fibres on the bond strength between concrete and rebar was greatest in those types of concrete that contained standard Portland cement