Boštjan Kovačič

Boštjan Kovačič
University of Maribor | UM · Department of Civil Engineering

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33
Publications
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165
Citations

Publications

Publications (33)
Article
Full-text available
This paper describes the non-contact vibration monitoring of prestressed reinforced concrete railway sleepers. The monitoring was carried out using physical measuring equipment consisting of a seismograph and geophones, a robotic total station (RTS) and scanning laser Doppler vibrometry (SLDV) equipment. Measurements of the dynamic response of slee...
Article
Full-text available
Building structures are subject to various deformations caused by external and internal factors. Deformations are determined by various methods in the form of monitoring. It is very important to monitor the dynamic vibration response on bridge structures since these measurements allow us to identify any possible damage over time and take appropriat...
Article
Full-text available
Determining the displacements and consequent deformations of structures is a demanding branch of engineering. Displacements are most often determined by geodetic methods, among which high-precision non-contact methods have recently taken the lead. Engineering geodesy is an indispensable part of construction projects. In the desire for efficient and...
Article
Full-text available
The elevation of airport runways is specified in the operations manuals and in globally accepted design guidelines. Airport runways are constantly exposed to various physical and weather factors. However, these factors can deteriorate the condition of the runway to the point where it becomes unusable. Monitoring and the continuous inspection of run...
Article
Full-text available
The demand for safety and to provide safety are increasing, parallel with the growth of the need for mobility, transport and logistics. A big part of the demands and recommendations to provide safety in air traffic is related to the safety at and in the surroundings of the runways. The research focused on exploring the airport infrastructure; mainl...
Article
Full-text available
Airport runways are exposed to large traffic loads and other external factors which cause their transformation. Monitoring the state of the unevenness and determining the runway defectiveness is a complex procedure which includes fast and qualitative measurements of the execution of flatness, their evaluation and the determination of the level of r...
Article
Full-text available
Runways are exposed to significant burdens and other external factors that cause their deformation. Monitoring runway deformities and determining the resulting damage is a complicated procedure which requires a rapid and accurate assessment of these deformities and evaluation of the damage they cause. In this study, an optimized process to determin...
Chapter
Monitoring of the objects is executed primarily to determine outer and inner influences on the object and mostly for the sake of the safety of people, animals, and material assets. The monitoring can be executed with various methods which depend on the object, conditions for the execution and the purpose of the monitoring. Our focus lies in the mon...
Article
Full-text available
The last 20-year announcement predicts a 3.5% increase in the number of yearly passengers which will result in the doubling of the number of passengers in air transport by 2037. Such anticipation indicates the need for efficient monitoring of airport infrastructure as the support of opportune and efficient maintenance works. The novelties of this a...
Article
Full-text available
Structural monitoring of objects is primarily executed to assess external and internal effects on the object, in order to ensure the safety of people, animals, and material assets. Such monitoring can be executed through various methods, depending on the object, conditions for execution, and purpose of the monitoring. In this case, the focus is on...
Article
Full-text available
Building construction is the subject of various factors and their consequences must be regularly monitored; this can be carried out in the form of control measurements or monitoring. This article aims to show the usability of geodetic non-contact methods in defining the dynamic response of structures. The lamella on which various methods for monito...
Article
The article presents the results from a static part of the load test for the Zglavje viaduct, located on the motorway A1 in Slovenia and the feasible usage of modern geodetic instruments for determination of dynamic response of a structure. Therefore, static analysis was employed for comparison of the implemented methods by which vertical displacem...
Article
Full-text available
Structure objects are exposed to different natural influences resulting in long-term and catastrophic outcomes. In order to avoid them, regular monitoring is needed. Various approaches to control condition of a structure can be considered, one of them is the measurement by means of monitoring which can be performed in different ways, depending on r...
Article
Full-text available
Levelling is one of the most important geodesic works in construction and other interventions in space. Mostly, it is used for the needs of the altitude presentations of the terrain, to determine shifts, to determine the height of the object, and for various precise laboratory and scientific researches. When determining the shifts, the values are c...
Article
Full-text available
Heavy burdens are placed on runways daily; thus, it is necessary to monitor these surfaces regularly. The appearance of distortions can cause difficulties for aircraft when they land or take off, which occurs mainly for lighter planes. This can be seen in reduced grip, uneven use of tires, problems with measurement systems, and unbalanced drive, wh...
Article
Full-text available
Displacement research using the three-dimensional global navigation satellite system (GNSS) as part of geodetic monitoring is becoming the key investigation for establishing a cause-and-effect relationships model between external natural factors, on the one hand, and the criteria that describes the level of functionality and safety of the observed...
Article
Full-text available
Practical example of signal processing from strain gauge, inductive transducer and total station measurements are used to illustrate the features of the bridge load testing measurements. FFT provides accurate representation of physical behavior for static and dynamic signals obtained when loading the bridge. As a reference measurement the signal fr...
Article
Full-text available
Today there are a lot of sophisticated methods to measure and analyse a bridge during load tests as a GPS, photogrammetric measurements, laser scanning, etc., The use of an classical techniques as trigonometric hights is still good enough for most demanding field observations. In practice control measurements are performed with the help of geodetic...
Article
Full-text available
Some structures and their relationships, positions in space and shifts represent the structural set of an area, as included within regional units, and smaller or larger portions of the earth’s crust known as the Earth’s plates and micro plates. The most important fact is that tectonic movements are always possible around the locations of considered...
Article
Full-text available
At the Centre for Geodesy of the University of Maribor, Slovenia, we engaged in the measurement and analysis of displacements for the last ten years. We wanted to find the connections between the displacements and the applied loads. Therefore, reliable and accurate results were needed. A reinforced-concrete plate was loaded to 42 kN in pre-calculat...
Article
Full-text available
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 steam...
Article
Full-text available
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 deformati...
Article
The fracture of a turbine shaft in the case of overloading can exhibit brittle or plastic failure, depending on the material properties, the turbine-shaft geometry and the form of loading. Usually, when the toughness increases, the stiffness of the shaft material is reduced, which can lead to the plastic twist of the shaft. If the fatigue crack app...
Article
Full-text available
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 operat...
Article
Full-text available
A lot has been written and said about the measuring of displacements and deformations of structures. This article introduces displacement measurements on the largest viaduct in Slovenia, and an analysis of the results, with particular stress on the accuracy of the calculations. Today there are a lot ofsophisticated methods to measure and analyse a...
Article
At the Faculty of Civil Engineering, Maribor, and in co-operation with the undertaking Geoin d.o.o., structural loading tests for the analysis of materials have been performed over many years. In this article an analysis of theoretical and measured values of vertical movements is presented. The loading values, material, and concrete properties are...
Article
The making of road body visualization for the needs of spatial verification is most often used prior to the building of large long-distant objects with a view of establishing the environmental influences. In order to work out a proper visualization, many data are needed. These data are acquired with field measurements, digital snapshots, orthophoto...
Conference Paper
In soft soil foundation must be strengthened with piles. Problem is always local, so measurement must be done on working location. Building company can only guess the quality of piles support. Laboratory for electrical measurement on Faculty for Electrical Engineering and Computer science and faculty for civil engineering developed special measurem...
Article
The paper presents methods for controlling vertical displacements on a reinforced concrete slab. To take the measurements we used geodetic instruments (level, total station and laser level) as well as non-geodetic instruments (inductive transducers). Theoretic displacements at the crack are calculated in accordance with European regulations for rei...
Article
Full-text available
U ovom se članku analiziraju rezultati teorijskih i izmjerenih veličina vertikalnih pomaka određenih različitim geodetskim i negeodetskim instrumentima. Teorijske veličine vertikalnih pomaka izračunate su za jednu, posebno konstruiranu, armiranobetonsku ploču, a stvarni su pomaci određivani različitim instrumentima. Mjerenja su izvedena u laborator...

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