Faculty of Civil Engineering

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Organizational structure of construction companies in the function of their efficient operation
(UNIVERSITY OF MONTENEGRO FACULTY OF CIVIL ENGINEERING, 2024-03)
Kedioski Vlatka
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Lazarevska Marijana
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Gacevski Vasko
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Ristov Riste
The organizational structure of the construction company represents the structure and the management of the project team, goods and project resources. It is a fundamental aspect of project management that defines how activities are coordinated and controlled in order to achieve the planned project and company goals. Companies that are in construction business have organizational structures that are based on project management. Construction projects are usually complex, capital, unique and unrepeatable. Project management is the application of knowledge, tools, techniques, and systems to define, execute, measure, control, report and improve processes. This paper explains several aspects that should be considered when choosing the organizational structure of the construction company. Nine case studies of medium and large construction companies were analysed, where special emphasis is placed on the types of organizational structure used, their complexity, adaptability, integrative processes, control during work, description of processes and procedures, etc. The results of conducted analysis showed that 56% of the analysed companies use a composite organizational structure, while the remaining 44% use a functional organizational structure. Although the analysed companies implement "Projects", they very rarely use a project organizational structure, and when they do it is mostly for some large and complex projects that are being implemented outside our country. By understanding the importance of the organizational structure, when the right one is chosen, high management and project managers can improve the overall project outcomes and increase the likelihood of success.
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Methodology for Managing Railway Projects
(Springer, 2024)
Zafirovski Zlatko
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Nedevska Ivona
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Gacevski Vasko
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Ristov Riste
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Ognjenovic Slobodan
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Application of AHP Method for Multi-criteria Evaluation of Variants for New Railway Route
(Springer, 2024)
Nedevska Ivona
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Zafirovski Zlatko
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Ristov Riste
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Gacevski Vasko
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AN APPROACH FOR RAILWAY PROJECT MANAGEMENT
(Department of Civil Engineering and Geodesy, Faculty of Technical Sciences, Novi Sad, 2023-11)
Zafirovski Zlatko
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Nedevska Ivona
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Gacevski Vasko
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Ristov Riste
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Ognjenovic Slobodan
This paper aims to solve this problem, which has recently become more common in railway projects. The key is in a planned approach and organization from the beginning of the project, which the candidate considers by elaborating a Methodology for the construction of the site in the form of a document. This methodology solves all the above and helps lead the project from its beginning to the end with a positive result. The scope of the methodology for the construction of a facility includes several scientific disciplines directly related to the realization of the facility, such as law, economics, ecology, quality management, construction, etc. Therefore, it should cover all matters in these areas and provide solutions and courses of action at the beginning and in the development phase of the site to adapt to possible needs and to be finalized. The conclusion is that the application of such a Methodology for the construction of the site is necessary, or it could be freely said that it is mandatory.
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SUBBASE STABILIZATION WITH FLY ASH
(University of Niš, Serbia, 2023)
Zafirovski Zlatko
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Markovski Mite
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Ognjenovic Slobodan
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Gacevski Vasko
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Nedevska Ivona
Due to increased activities in civil engineering, and especially in the transport infrastructure, and thus an increase in the use of additional construction materials, innovative solutions are needed in finding alternative materials for the preservation of natural resources. One of the solutions for preserving natural building materials is the application of recycled material, which will also meet the required standards in civil engineering. In the transport infrastructure, there is a great opportunity for the use of recycled material, starting from the subbase, through the embankment and all the way to the superstructure and the concrete structures. One of the recycled materials that can be used in construction is fly ash. Fly ash is the most promising waste material when it comes to the wide range of applications in construction. Fly ash is obtained by burning coal in thermal power plants to produce electricity. Due to variations in the composition and characteristics of fly ash, several divisions and classifications have been created. One of the main classifications is according to the American standard ASTM C 618-05 where it is divided into class C and class F fly ash. This research aims to investigate the application of fly ash for subgrade stabilization and to determine the difference from a financial and environmental perspective for the application of fly ash compared to natural stone aggregate. The main research was carried out in connection with the increased use of natural stone aggregate, which appeared as a need during the rehabilitation of state road R1206, section Karpalak - Želino. Apart from the use of large quantities of stone aggregate for the stabilization of the subgrade, it also had an impact on the financial framework for the realization of the road project. In Macedonia, an analysis of the chemical composition of 4 samples of fly ash obtained in REC Bitola was carried out. From the obtained results, it can be concluded that it belongs to the classification of F-class fly ash and with the use of an activator (lime or cement) it can be used in the stabilization of the subgrade.
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TRACK GEOMETRY DEGRADATION AND MAINTENANCE OF THE RAILWAYS
(Faculty of Civil Engineering - Skopje, 2022-07)
Nedevska Ivona
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Zafirovski Zlatko
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Lazarevska Marijana
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Ristov Riste
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Gacevski Vasko
Today, rail networks across the world are getting busier with trains travelling at higher speeds and carrying more passengers and heavier axle loads than ever before. The combination of these factors has put considerable pressure on the existing infrastructure, leading to increased demands in inspection and maintenance of rail assets. This paper studies track deterioration from geometric aspects and its influencing factors with a case study for railway line of pan – European Corridor 10 on the territory of North Macedonia. The analysis made in the paper will obtain results that would reflect the actual state of the railway infrastructure on the territory of the Republic of North Macedonia.
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ANALYSIS OF THE CAPACITY AND LEVEL OF SERVICE FOR URBAN INTERSECTION
(University of Zagreb Faculty of Civil Engineering, 2022-05)
Nedevska Ivana
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Ristov Riste
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Zafirovski Zlatko
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Ognjenovic Slobodan
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Gacevski Vasko
The augmentation of motorization level leads us to the need for mobility and demands better infrastructure, in urban and suburban areas. The complexity of this problem is especially notable in urban areas where the space delimitations, functional characteristics and different transportation must be considered. The intersection between Partizanska street and Boris Krajger street, in Shtip, has been analysed with the methodology for capacity and level of service, according to international software and manuals. Both streets are with one lane per direction, and lately it is very frequent intersections in Shtip. Number of vehicles is determined by measuring the traffic, and those inputs are used to analyse three solutions: the current solution (unsignalized intersection), four legged intersection and roundabout both with boulevard profile for the main corridor and two way street for the secondary corridor. Calculations are based on custom measurements within a week.
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COMPARATIVE ANALYSIS OF EXCAVATION AND TUNNEL SOLUTIONS FOR THE ROAD DRENOVO - RAEC
(University of Banja Luka Faculty of Architecture, Civil Engineering and Geodesy, 2022-06)
Gacevski Vasko
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Ristov Riste
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Nedevska Ivona
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Zafirovski Zlatko
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Ognjenovic Slobodan
When withdrawing the route of the expressway Drenovo - Raec, the axis of the road is forced to stretch near or through the mountain massifs. This created a general dilemma, whether to make classical excavations or tunnel constructions in certain locations. Considerations were also made for the decision on high embankments or viaducts. The characteristic location presented in this paper is located between the existing national road and the river Raec. For this location, a comparative analysis of the variant solutions for excavation and tunnel was made and the main parameters that affect the final solution were indicated.
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MEASURES TO IMPROVE SAFETY ON EXISTING MAIN STREET 101
(UNIVERSITY OF MONTENEGRO FACULTY OF CIVIL ENGINEERING, 2022-03)
Ristov Riste
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Nedevska Ivona
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Zafirovski Zlatko
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Ognjenovic Slobodan
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Gacevski Vasko
Identifying and classifying accident black spots on urban roads is a critical element of road safety research. An accident blackspot treatment program is a safety improvement program that can reactively deal with accidents. However, implementing such a program requires relevant accident data, which are generally unavailable or limited in developing countries. Thus, this paper proposes a supportive approach (public participation) to overcome this hindrance. Residence can identify locations where accidents occurrences are unusually high, and their input is potentially helpful for the identification process. In addition, besides the indirect benefits to creating public awareness, the proposed methodology is potentially helpful for speeding up and economizing the accident spot locations identification process. Finally, the paper proposes various construction and traffic safety measures to improve safety.
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PROCESS OF DESIGNING AN ACCESS ROAD AND A WINDMILL PLATEAU IN BOGDANCI
(UNIVERSITY OF MONTENEGRO FACULTY OF CIVIL ENGINEERING, 2022-03)
Ristov Riste
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Nedevska Ivona
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Zafirovski Zlatko
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Gacevski Vasko
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Lazarevska Marijana
Many countries invest heavily in wind energy to tackle climate change and secure energy supplies. It is a clean source and becomes more cost-effective with technological advancement and increased capacity per unit installed. Wind energy as a power source is an attractive alternative to fossil fuels. However, wind farms are typically constructed in undeveloped rural areas with challenging topography. In addition, the lack of a road network leading to the site and within the site itself poses significant challenges to the planning of wind farm construction. Therefore, selecting the most appropriate access road route is essential in the overall planning of wind farm construction. This paper presents a comprehensive view of the design process and will focus on selecting access road routes to optimize the general wind farm construction. An integrated framework for wind farm design is presented, and the problem of optimal access road selection is highlighted. Finally, a numeric example is shown, including conclusions, limitations, and suggestions for future research.

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