TY  - CONF
AU  - Mitrović, Stefan
AU  - Vidović, Milica
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3482
AB  - In the last few decades, the technology of 3D concrete printing (3DCP) has had a significant
development. This technology has a great potential to improve efficiency in the construction
industry. It can provide safer site working conditions, material savings, a reduction of
construction time, and a high versatility of architectural and structural design. However, this new
technology is still not fully investigated. The wider application is limited by the lack of standards
and guidelines for design and production.
The literature review showed that, there are only a few studies investigating structural behaviour
of 3DCP structures and elements. Beams and walls with and without addition of fibers,
reinforcement or cables under ultimate loads were tested. The incorporation of reinforcement in
the printing process, connections between printed pieces and long-term behaviour of 3DCP
elements under sustained load are opened questions.
The topic of this research was an experimental testing of 3DCP truss girder. Printing of truss
girder was done using a commercial, ready-to-use premix Sikacrete® 751 3D. In order to print,
the printer head was moved in the Z direction to alternately place two desired path layers. A truss
girder with dimensions of 87x29x12 cm, without reinforcement, was subjected to a four-point
bending test up to failure. During this testing strains in two diagonals, deflection of the two
bottom joints, and ultimate force were measured. Ultimate force was 30 kN and the brittle failure
of tensioned bottom chord occurred. The force in tensioned diagonal was 13.45 kN and in the
compressed one 36.77 kN. Additionally, three samples obtained from the top and bottom chords
were tested on axial tension. The tension capacity of samples was 25.12 kN.
C3  - Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024
T1  - Experimental testing of 3D printed concrete truss girder
EP  - 523
SP  - 517
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3482
ER  - 

@conference{
author = "Mitrović, Stefan and Vidović, Milica and Ignjatović, Ivan and Dragaš, Jelena",
year = "2024",
abstract = "In the last few decades, the technology of 3D concrete printing (3DCP) has had a significant
development. This technology has a great potential to improve efficiency in the construction
industry. It can provide safer site working conditions, material savings, a reduction of
construction time, and a high versatility of architectural and structural design. However, this new
technology is still not fully investigated. The wider application is limited by the lack of standards
and guidelines for design and production.
The literature review showed that, there are only a few studies investigating structural behaviour
of 3DCP structures and elements. Beams and walls with and without addition of fibers,
reinforcement or cables under ultimate loads were tested. The incorporation of reinforcement in
the printing process, connections between printed pieces and long-term behaviour of 3DCP
elements under sustained load are opened questions.
The topic of this research was an experimental testing of 3DCP truss girder. Printing of truss
girder was done using a commercial, ready-to-use premix Sikacrete® 751 3D. In order to print,
the printer head was moved in the Z direction to alternately place two desired path layers. A truss
girder with dimensions of 87x29x12 cm, without reinforcement, was subjected to a four-point
bending test up to failure. During this testing strains in two diagonals, deflection of the two
bottom joints, and ultimate force were measured. Ultimate force was 30 kN and the brittle failure
of tensioned bottom chord occurred. The force in tensioned diagonal was 13.45 kN and in the
compressed one 36.77 kN. Additionally, three samples obtained from the top and bottom chords
were tested on axial tension. The tension capacity of samples was 25.12 kN.",
journal = "Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024",
title = "Experimental testing of 3D printed concrete truss girder",
pages = "523-517",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3482"
}

Mitrović, S., Vidović, M., Ignjatović, I.,& Dragaš, J.. (2024). Experimental testing of 3D printed concrete truss girder. in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024, 517-523.
https://hdl.handle.net/21.15107/rcub_grafar_3482

Mitrović S, Vidović M, Ignjatović I, Dragaš J. Experimental testing of 3D printed concrete truss girder. in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024. 2024;:517-523.
https://hdl.handle.net/21.15107/rcub_grafar_3482 .

Mitrović, Stefan, Vidović, Milica, Ignjatović, Ivan, Dragaš, Jelena, "Experimental testing of 3D printed concrete truss girder" in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024 (2024):517-523,
https://hdl.handle.net/21.15107/rcub_grafar_3482 .

TY  - CONF
AU  - Zakić, Dimitrije
AU  - Jevtić, Dragica
AU  - Radević, Aleksandar
AU  - Vidović, Milica
AU  - Mitrović, Stefan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3249
AB  - This paper deals primarily with research and testing of ultra-high performance concrete (UHPC) made with or without the addition of steel fibers. Two stages of research are presented and discussed in detail: first - UHPC based mostly on local component materials and produced in the form of a premix with a commercial name ForteCrete150®, and second – modified UHPC, made with a partial cement substitution by limestone filler, as a more eco-friendly and sustainable solution. The obtained results indicate that there is a great potential for application of ultra-high performance concrete, especially in the form of premix that can be prepared on-site. The addition of limestone filler (and potentially other types of mineral additives) as SCM, could generally contribute to improvement of a negative agenda surrounding the cementitious composites.
C3  - 30th Slovenian Colloquim on Concrete - multi-component fine-grained concretes and mortars, Trzin, 7. 11. 2023
T1  - Research, testing and application potential of steel fiber reinforced ultra-high performance concrete
EP  - 80
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3249
ER  - 

@conference{
author = "Zakić, Dimitrije and Jevtić, Dragica and Radević, Aleksandar and Vidović, Milica and Mitrović, Stefan",
year = "2023",
abstract = "This paper deals primarily with research and testing of ultra-high performance concrete (UHPC) made with or without the addition of steel fibers. Two stages of research are presented and discussed in detail: first - UHPC based mostly on local component materials and produced in the form of a premix with a commercial name ForteCrete150®, and second – modified UHPC, made with a partial cement substitution by limestone filler, as a more eco-friendly and sustainable solution. The obtained results indicate that there is a great potential for application of ultra-high performance concrete, especially in the form of premix that can be prepared on-site. The addition of limestone filler (and potentially other types of mineral additives) as SCM, could generally contribute to improvement of a negative agenda surrounding the cementitious composites.",
journal = "30th Slovenian Colloquim on Concrete - multi-component fine-grained concretes and mortars, Trzin, 7. 11. 2023",
title = "Research, testing and application potential of steel fiber reinforced ultra-high performance concrete",
pages = "80-72",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3249"
}

Zakić, D., Jevtić, D., Radević, A., Vidović, M.,& Mitrović, S.. (2023). Research, testing and application potential of steel fiber reinforced ultra-high performance concrete. in 30th Slovenian Colloquim on Concrete - multi-component fine-grained concretes and mortars, Trzin, 7. 11. 2023, 72-80.
https://hdl.handle.net/21.15107/rcub_grafar_3249

Zakić D, Jevtić D, Radević A, Vidović M, Mitrović S. Research, testing and application potential of steel fiber reinforced ultra-high performance concrete. in 30th Slovenian Colloquim on Concrete - multi-component fine-grained concretes and mortars, Trzin, 7. 11. 2023. 2023;:72-80.
https://hdl.handle.net/21.15107/rcub_grafar_3249 .

Zakić, Dimitrije, Jevtić, Dragica, Radević, Aleksandar, Vidović, Milica, Mitrović, Stefan, "Research, testing and application potential of steel fiber reinforced ultra-high performance concrete" in 30th Slovenian Colloquim on Concrete - multi-component fine-grained concretes and mortars, Trzin, 7. 11. 2023 (2023):72-80,
https://hdl.handle.net/21.15107/rcub_grafar_3249 .

TY  - CONF
AU  - Milićević, Ivan
AU  - Vidović, Milica
AU  - Dragaš, Jelena
AU  - Milosavljević, Branko
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3220
AB  - The construction industry is one of the most important parts of economic development of society but it
also has a very negative impact on the environment. Using the three concepts of circular economy: reuse,
reduce and recycle, it is possible to decrease its negative impact. The steel-concrete composite structures
and prefabricated structures enable, environmentally beneficial, circular life-cycle of buildings. For
structural performance during the lifecycle, it is very important to have an adequate connection between
the steel and reinforced concrete members.
Different types of connectors have been widely used in composite structures. Demountable ones are
advantageous in terms of reuse. In the last few years, the innovative demountable steel-concrete bolted
connector with mechanical coupler has been proposed. There are two types of these bolted connectors
depending on the type anchorage i.e., with the rebar anchor or with the second bolt.
This paper gives an overview of previous research of bolted connectors with mechanical coupler
capacity under static load. Influence of key parameters on the shear behaviour of the connector was
observed: concrete compressive strength, connector dimensions and concrete edge distance. The shear
and tension resistances of individual parts of the commercially available connectors were determined
using recommendations of design codes and technical documentation. In case of the connector loaded
in tension, it was concluded that the resistance is governed by the resistance of the rebar anchor. In case
of the connector loaded in shear, design recommendations were also compared with the previous
experimental tests. It was concluded that the shear resistance highly depends on the connection layout
and concrete strength.
C3  - Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023.
T1  - Behaviour and design of bolted connectors with mechanical coupler: an overview
EP  - 680
SP  - 671
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3220
ER  - 

@conference{
author = "Milićević, Ivan and Vidović, Milica and Dragaš, Jelena and Milosavljević, Branko",
year = "2023",
abstract = "The construction industry is one of the most important parts of economic development of society but it
also has a very negative impact on the environment. Using the three concepts of circular economy: reuse,
reduce and recycle, it is possible to decrease its negative impact. The steel-concrete composite structures
and prefabricated structures enable, environmentally beneficial, circular life-cycle of buildings. For
structural performance during the lifecycle, it is very important to have an adequate connection between
the steel and reinforced concrete members.
Different types of connectors have been widely used in composite structures. Demountable ones are
advantageous in terms of reuse. In the last few years, the innovative demountable steel-concrete bolted
connector with mechanical coupler has been proposed. There are two types of these bolted connectors
depending on the type anchorage i.e., with the rebar anchor or with the second bolt.
This paper gives an overview of previous research of bolted connectors with mechanical coupler
capacity under static load. Influence of key parameters on the shear behaviour of the connector was
observed: concrete compressive strength, connector dimensions and concrete edge distance. The shear
and tension resistances of individual parts of the commercially available connectors were determined
using recommendations of design codes and technical documentation. In case of the connector loaded
in tension, it was concluded that the resistance is governed by the resistance of the rebar anchor. In case
of the connector loaded in shear, design recommendations were also compared with the previous
experimental tests. It was concluded that the shear resistance highly depends on the connection layout
and concrete strength.",
journal = "Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023.",
title = "Behaviour and design of bolted connectors with mechanical coupler: an overview",
pages = "680-671",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3220"
}

Milićević, I., Vidović, M., Dragaš, J.,& Milosavljević, B.. (2023). Behaviour and design of bolted connectors with mechanical coupler: an overview. in Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023., 671-680.
https://hdl.handle.net/21.15107/rcub_grafar_3220

Milićević I, Vidović M, Dragaš J, Milosavljević B. Behaviour and design of bolted connectors with mechanical coupler: an overview. in Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023.. 2023;:671-680.
https://hdl.handle.net/21.15107/rcub_grafar_3220 .

Milićević, Ivan, Vidović, Milica, Dragaš, Jelena, Milosavljević, Branko, "Behaviour and design of bolted connectors with mechanical coupler: an overview" in Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023. (2023):671-680,
https://hdl.handle.net/21.15107/rcub_grafar_3220 .

TY  - CONF
AU  - Vidović, Milica
AU  - Dragaš, Jelena
AU  - Koković, Veljko
AU  - Zakić, Dimitrije
AU  - Tepavčević, Miroslav
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2901
AB  - The production of ultra-high performance concrete is one of the new ideas in modern construction, developed in the past few decades. A compressive strength higher than 150 MPa has been achieved using a relatively large amount of cement, approximately 800 kg/m3. As the cement industry is one of the largest producers of carbon dioxide, it is clear that the cement amount in concrete should be reduced to minimize greenhouse gases emission and slow down the global warming process. One possibility for that reduction is a replacement of cement with limestone filler.
This paper shows the results of experimental testing of five ultra-high-performance concrete mixtures. A referent mixture and four mixtures with a partial replacement of cement with limestone filler were made and tested. Two types of limestone fillers varying in particle size were used: one with a mean particle size of 2.5 μm and the other one with a mean particle size of 11 μm. Two groups of concrete mixtures were made with 20% and 30% of cement replaced by limestone. All other components: silica fume, quartz sand, water and superplasticizer were kept constant in all mixtures. Limestone filler is selected based on a particle size - so that its particles are the same size or smaller compared to cement. Basic fresh and hardened concrete properties were tested for all mixtures: consistency was determined using standard flow test and 28-day compressive strength was obtained by testing 10-cm cube samples.
Based on the obtained results, it could be concluded that the replacement of cement with limestone brought improvements in compressive strength and workability. The compressive strength of all mixtures was app. 120 MPa, while the mixtures with limestone were more flowable. The economic aspect was also considered. The analysis showed that up to 25% cost reduction can be achieved without compromising the compressive strength of this type of concrete by using limestone as a filler.
PB  - Macedonian Association of Structural Engineers
C3  - 19th International symposium
T1  - Physical and mechanical properties of Ultra-high- performance concrete with limestone
SP  - 807
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2901
ER  - 

@conference{
author = "Vidović, Milica and Dragaš, Jelena and Koković, Veljko and Zakić, Dimitrije and Tepavčević, Miroslav",
year = "2022",
abstract = "The production of ultra-high performance concrete is one of the new ideas in modern construction, developed in the past few decades. A compressive strength higher than 150 MPa has been achieved using a relatively large amount of cement, approximately 800 kg/m3. As the cement industry is one of the largest producers of carbon dioxide, it is clear that the cement amount in concrete should be reduced to minimize greenhouse gases emission and slow down the global warming process. One possibility for that reduction is a replacement of cement with limestone filler.
This paper shows the results of experimental testing of five ultra-high-performance concrete mixtures. A referent mixture and four mixtures with a partial replacement of cement with limestone filler were made and tested. Two types of limestone fillers varying in particle size were used: one with a mean particle size of 2.5 μm and the other one with a mean particle size of 11 μm. Two groups of concrete mixtures were made with 20% and 30% of cement replaced by limestone. All other components: silica fume, quartz sand, water and superplasticizer were kept constant in all mixtures. Limestone filler is selected based on a particle size - so that its particles are the same size or smaller compared to cement. Basic fresh and hardened concrete properties were tested for all mixtures: consistency was determined using standard flow test and 28-day compressive strength was obtained by testing 10-cm cube samples.
Based on the obtained results, it could be concluded that the replacement of cement with limestone brought improvements in compressive strength and workability. The compressive strength of all mixtures was app. 120 MPa, while the mixtures with limestone were more flowable. The economic aspect was also considered. The analysis showed that up to 25% cost reduction can be achieved without compromising the compressive strength of this type of concrete by using limestone as a filler.",
publisher = "Macedonian Association of Structural Engineers",
journal = "19th International symposium",
title = "Physical and mechanical properties of Ultra-high- performance concrete with limestone",
pages = "807",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2901"
}

Vidović, M., Dragaš, J., Koković, V., Zakić, D.,& Tepavčević, M.. (2022). Physical and mechanical properties of Ultra-high- performance concrete with limestone. in 19th International symposium
Macedonian Association of Structural Engineers., 807.
https://hdl.handle.net/21.15107/rcub_grafar_2901

Vidović M, Dragaš J, Koković V, Zakić D, Tepavčević M. Physical and mechanical properties of Ultra-high- performance concrete with limestone. in 19th International symposium. 2022;:807.
https://hdl.handle.net/21.15107/rcub_grafar_2901 .

Vidović, Milica, Dragaš, Jelena, Koković, Veljko, Zakić, Dimitrije, Tepavčević, Miroslav, "Physical and mechanical properties of Ultra-high- performance concrete with limestone" in 19th International symposium (2022):807,
https://hdl.handle.net/21.15107/rcub_grafar_2901 .

TY  - CONF
AU  - Vidović, Milica
AU  - Nefovska-Danilović, Marija
AU  - Radišić, Marko
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2797
AB  - As a result of rapid development of cities and construction of high-speed rail/road infrastructure, vibration serviceability of buildings due to traffic-induced vibrations has become a growing issue that affects the comfort of living and health of building occupants. In this paper a numerical study in which the influence of soil stiffness on the traffic-induced vibrations of an eight-story residential building is investigated considering soil-structure interaction and applying the substructuring approach and transfer function method. The results are presented in terms of transfer functions for selected points of interests inside the building. The results show that the resonant response of the structure occurs at lower frequencies for soft soil and at higher frequencies for stiff soil, indicating that soil-structure interaction can significantly affect the vibration response of the building.
PB  - Association of Structural Engineers of Serbia
C3  - 16th International Congress Proceeding
T1  - Assessment of traffic-induced building vibrations using Transfer function method
EP  - 240
SP  - 229
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2797
ER  - 

@conference{
author = "Vidović, Milica and Nefovska-Danilović, Marija and Radišić, Marko",
year = "2022",
abstract = "As a result of rapid development of cities and construction of high-speed rail/road infrastructure, vibration serviceability of buildings due to traffic-induced vibrations has become a growing issue that affects the comfort of living and health of building occupants. In this paper a numerical study in which the influence of soil stiffness on the traffic-induced vibrations of an eight-story residential building is investigated considering soil-structure interaction and applying the substructuring approach and transfer function method. The results are presented in terms of transfer functions for selected points of interests inside the building. The results show that the resonant response of the structure occurs at lower frequencies for soft soil and at higher frequencies for stiff soil, indicating that soil-structure interaction can significantly affect the vibration response of the building.",
publisher = "Association of Structural Engineers of Serbia",
journal = "16th International Congress Proceeding",
title = "Assessment of traffic-induced building vibrations using Transfer function method",
pages = "240-229",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2797"
}

Vidović, M., Nefovska-Danilović, M.,& Radišić, M.. (2022). Assessment of traffic-induced building vibrations using Transfer function method. in 16th International Congress Proceeding
Association of Structural Engineers of Serbia., 229-240.
https://hdl.handle.net/21.15107/rcub_grafar_2797

Vidović M, Nefovska-Danilović M, Radišić M. Assessment of traffic-induced building vibrations using Transfer function method. in 16th International Congress Proceeding. 2022;:229-240.
https://hdl.handle.net/21.15107/rcub_grafar_2797 .

Vidović, Milica, Nefovska-Danilović, Marija, Radišić, Marko, "Assessment of traffic-induced building vibrations using Transfer function method" in 16th International Congress Proceeding (2022):229-240,
https://hdl.handle.net/21.15107/rcub_grafar_2797 .

TY  - CONF
AU  - Mitrović, Stefan
AU  - Dragaš, Jelena
AU  - Carević, Vedran
AU  - Vidović, Milica
AU  - Ignjatović, Ivan
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2773
AB  - The aim of this paper is an experimental investigation of fresh concrete properties of the mixture designed for 3D printing. Different mixtures with and without chemical additions (superplasticizer and hydration controller) with variable water-binder factor were considered. Density, time setting and workability flow/slump tests were determined in the fresh state. Ultimate capacities for compressive and flexural strength were analysed on cube and prism specimens at different age. The effect of chemical additions on properties was shown in the conclusion of this paper. The mixture with the waterbinder ratio 0.45 and amount of 13.8% of hydration controller had obtained the optimal properties for 3D printing.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK)
PB  - Udruženje savremene industrije glinenih proizvoda Srbije
C3  - XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija
T1  - Experimental investigation of basic concrete properties for 3D printing technology
EP  - 488
SP  - 479
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2773
ER  - 

@conference{
author = "Mitrović, Stefan and Dragaš, Jelena and Carević, Vedran and Vidović, Milica and Ignjatović, Ivan",
year = "2022",
abstract = "The aim of this paper is an experimental investigation of fresh concrete properties of the mixture designed for 3D printing. Different mixtures with and without chemical additions (superplasticizer and hydration controller) with variable water-binder factor were considered. Density, time setting and workability flow/slump tests were determined in the fresh state. Ultimate capacities for compressive and flexural strength were analysed on cube and prism specimens at different age. The effect of chemical additions on properties was shown in the conclusion of this paper. The mixture with the waterbinder ratio 0.45 and amount of 13.8% of hydration controller had obtained the optimal properties for 3D printing.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK), Udruženje savremene industrije glinenih proizvoda Srbije",
journal = "XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija",
title = "Experimental investigation of basic concrete properties for 3D printing technology",
pages = "488-479",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2773"
}

Mitrović, S., Dragaš, J., Carević, V., Vidović, M.,& Ignjatović, I.. (2022). Experimental investigation of basic concrete properties for 3D printing technology. in XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK)., 479-488.
https://hdl.handle.net/21.15107/rcub_grafar_2773

Mitrović S, Dragaš J, Carević V, Vidović M, Ignjatović I. Experimental investigation of basic concrete properties for 3D printing technology. in XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija. 2022;:479-488.
https://hdl.handle.net/21.15107/rcub_grafar_2773 .

Mitrović, Stefan, Dragaš, Jelena, Carević, Vedran, Vidović, Milica, Ignjatović, Ivan, "Experimental investigation of basic concrete properties for 3D printing technology" in XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija (2022):479-488,
https://hdl.handle.net/21.15107/rcub_grafar_2773 .