TY  - CONF
AU  - Nefovska-Danilović, Marija
AU  - Racić, Vitomir
AU  - Milojević, Marija
AU  - Mišković, Zoran
AU  - Savatović, Siniša
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3408
AB  - Cross-laminated timber (CLT) floors have gained in popularity due to their outstanding strength,
aesthetic appeal, good fire resistance, and high level of prefabrication. However, due to their
high stiffness-to-weight ratio, CLT floors are highly susceptible to pedestrian-induced
vibrations. In design practice, vibration serviceability is usually assessed by assuming a floor as
a set of CLT panels with no inter-panel connections, which leads to overestimation of the
vibration response. In this paper, an experimental dynamic testing was carried out to identify
modal properties and pedestrian-induced response of two CLT floors with different number of
panels in a floor assembly. Influence of the inter-panel connections on the floor modal properties
and pedestrian-induced vibration response is particularly studied and discussed.
C3  - EURODYN 2023, XII International Conference on Structural Dynamics, 02-05 July 2023, Delft, The Netherlands
T1  - Experimental modal analysis of cross-laminated timber floors
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3408
ER  - 

@conference{
author = "Nefovska-Danilović, Marija and Racić, Vitomir and Milojević, Marija and Mišković, Zoran and Savatović, Siniša",
year = "2023",
abstract = "Cross-laminated timber (CLT) floors have gained in popularity due to their outstanding strength,
aesthetic appeal, good fire resistance, and high level of prefabrication. However, due to their
high stiffness-to-weight ratio, CLT floors are highly susceptible to pedestrian-induced
vibrations. In design practice, vibration serviceability is usually assessed by assuming a floor as
a set of CLT panels with no inter-panel connections, which leads to overestimation of the
vibration response. In this paper, an experimental dynamic testing was carried out to identify
modal properties and pedestrian-induced response of two CLT floors with different number of
panels in a floor assembly. Influence of the inter-panel connections on the floor modal properties
and pedestrian-induced vibration response is particularly studied and discussed.",
journal = "EURODYN 2023, XII International Conference on Structural Dynamics, 02-05 July 2023, Delft, The Netherlands",
title = "Experimental modal analysis of cross-laminated timber floors",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3408"
}

Nefovska-Danilović, M., Racić, V., Milojević, M., Mišković, Z.,& Savatović, S.. (2023). Experimental modal analysis of cross-laminated timber floors. in EURODYN 2023, XII International Conference on Structural Dynamics, 02-05 July 2023, Delft, The Netherlands.
https://hdl.handle.net/21.15107/rcub_grafar_3408

Nefovska-Danilović M, Racić V, Milojević M, Mišković Z, Savatović S. Experimental modal analysis of cross-laminated timber floors. in EURODYN 2023, XII International Conference on Structural Dynamics, 02-05 July 2023, Delft, The Netherlands. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3408 .

Nefovska-Danilović, Marija, Racić, Vitomir, Milojević, Marija, Mišković, Zoran, Savatović, Siniša, "Experimental modal analysis of cross-laminated timber floors" in EURODYN 2023, XII International Conference on Structural Dynamics, 02-05 July 2023, Delft, The Netherlands (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3408 .

TY  - CONF
AU  - Nefovska-Danilović, Marija
AU  - Racić, Vitomir
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3262
AB  - With advancements in structural modelling and construction techniques, contemporary footbridges have become increasingly susceptible to vibrations induced by human activities, such as walking, jogging and jumping.  This study aims to evaluate pedestrian-induced vibrations of a stress-ribbon footbridge. A three-dimensional finite element model of the footbridge was developed, considering nonlinear behavior of the structure and staged construction. Vibration serviceability assessment was carried out using HIVOSS design guidelines. Numerical modal analysis showed that the lateral modes of vibration cannot be excited in resonance by pedestrians walking. However, the footbridge is prone to vertical pedestrian-induced vibrations. The first torsional mode shape is the most critical. It can be excited in resonance by the first harmonic of the vertical pedestrian loading, yielding vibration response beyond the suggested acceleration limit in some extreme scenarios of pedestrian loading.
PB  - Department for Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi sad
C3  - 16th International scientific conference Planning, design, construction and building renewal INDIS 2023, 16-17 November 2023
T1  - Vibration serviceability assessment of a stress-ribbon footbridge
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3262
ER  - 

@conference{
author = "Nefovska-Danilović, Marija and Racić, Vitomir",
year = "2023",
abstract = "With advancements in structural modelling and construction techniques, contemporary footbridges have become increasingly susceptible to vibrations induced by human activities, such as walking, jogging and jumping.  This study aims to evaluate pedestrian-induced vibrations of a stress-ribbon footbridge. A three-dimensional finite element model of the footbridge was developed, considering nonlinear behavior of the structure and staged construction. Vibration serviceability assessment was carried out using HIVOSS design guidelines. Numerical modal analysis showed that the lateral modes of vibration cannot be excited in resonance by pedestrians walking. However, the footbridge is prone to vertical pedestrian-induced vibrations. The first torsional mode shape is the most critical. It can be excited in resonance by the first harmonic of the vertical pedestrian loading, yielding vibration response beyond the suggested acceleration limit in some extreme scenarios of pedestrian loading.",
publisher = "Department for Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi sad",
journal = "16th International scientific conference Planning, design, construction and building renewal INDIS 2023, 16-17 November 2023",
title = "Vibration serviceability assessment of a stress-ribbon footbridge",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3262"
}

Nefovska-Danilović, M.,& Racić, V.. (2023). Vibration serviceability assessment of a stress-ribbon footbridge. in 16th International scientific conference Planning, design, construction and building renewal INDIS 2023, 16-17 November 2023
Department for Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi sad..
https://hdl.handle.net/21.15107/rcub_grafar_3262

Nefovska-Danilović M, Racić V. Vibration serviceability assessment of a stress-ribbon footbridge. in 16th International scientific conference Planning, design, construction and building renewal INDIS 2023, 16-17 November 2023. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3262 .

Nefovska-Danilović, Marija, Racić, Vitomir, "Vibration serviceability assessment of a stress-ribbon footbridge" in 16th International scientific conference Planning, design, construction and building renewal INDIS 2023, 16-17 November 2023 (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3262 .

TY  - CONF
AU  - Racić, Vitomir
AU  - Nefovska-Danilović, Marija
AU  - Milojević, Marija
AU  - Marjanović, Miroslav
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3187
AB  - Cross-laminated timber (CLT) floors are typically composed of prefabricated CLT panels assembled on a construction site. The actual connections are commonly disregarded at design stage. CLT floors are modelled either as a monolithic slab or more frequently as a collection of CLT panels with no connections. This paper presents a numerical study designed to demonstrate the effect of two common inter-panel connections, i.e. single surface spline and half-lapped joint, on vibration modes of various CLT floor configurations. The inter-panel connections are modelled as an equivalent 2D elastic strip between the CLT panels. This uncomplicated yet robust approximation of reality can be used readily in design practice, regardless finite element (FE) software used to determine modal properties of a floor. The corresponding monolithic floors and those without inter-panel connections are studied for comparison. The results showed that the common practice of modelling CLT floors either as monolithic slabs or as a set of independent panels should come to an end.
C3  - International Conference on Experimental Vibration Analysis for Civil Engineering Structures EVACE, Politecnico di Milano, Italy, August 30 – September 1, 2023S 2023
T1  - Effect of Inter-panel Connections on Modal Properties of Cross-Laminated Timber Floors
EP  - 598
SP  - 589
DO  - 10.1007/978-3-031-39109-5_60
ER  - 

@conference{
author = "Racić, Vitomir and Nefovska-Danilović, Marija and Milojević, Marija and Marjanović, Miroslav",
year = "2023",
abstract = "Cross-laminated timber (CLT) floors are typically composed of prefabricated CLT panels assembled on a construction site. The actual connections are commonly disregarded at design stage. CLT floors are modelled either as a monolithic slab or more frequently as a collection of CLT panels with no connections. This paper presents a numerical study designed to demonstrate the effect of two common inter-panel connections, i.e. single surface spline and half-lapped joint, on vibration modes of various CLT floor configurations. The inter-panel connections are modelled as an equivalent 2D elastic strip between the CLT panels. This uncomplicated yet robust approximation of reality can be used readily in design practice, regardless finite element (FE) software used to determine modal properties of a floor. The corresponding monolithic floors and those without inter-panel connections are studied for comparison. The results showed that the common practice of modelling CLT floors either as monolithic slabs or as a set of independent panels should come to an end.",
journal = "International Conference on Experimental Vibration Analysis for Civil Engineering Structures EVACE, Politecnico di Milano, Italy, August 30 – September 1, 2023S 2023",
title = "Effect of Inter-panel Connections on Modal Properties of Cross-Laminated Timber Floors",
pages = "598-589",
doi = "10.1007/978-3-031-39109-5_60"
}

Racić, V., Nefovska-Danilović, M., Milojević, M.,& Marjanović, M.. (2023). Effect of Inter-panel Connections on Modal Properties of Cross-Laminated Timber Floors. in International Conference on Experimental Vibration Analysis for Civil Engineering Structures EVACE, Politecnico di Milano, Italy, August 30 – September 1, 2023S 2023, 589-598.
https://doi.org/10.1007/978-3-031-39109-5_60

Racić V, Nefovska-Danilović M, Milojević M, Marjanović M. Effect of Inter-panel Connections on Modal Properties of Cross-Laminated Timber Floors. in International Conference on Experimental Vibration Analysis for Civil Engineering Structures EVACE, Politecnico di Milano, Italy, August 30 – September 1, 2023S 2023. 2023;:589-598.
doi:10.1007/978-3-031-39109-5_60 .

Racić, Vitomir, Nefovska-Danilović, Marija, Milojević, Marija, Marjanović, Miroslav, "Effect of Inter-panel Connections on Modal Properties of Cross-Laminated Timber Floors" in International Conference on Experimental Vibration Analysis for Civil Engineering Structures EVACE, Politecnico di Milano, Italy, August 30 – September 1, 2023S 2023 (2023):589-598,
https://doi.org/10.1007/978-3-031-39109-5_60 . .

TY  - JOUR
AU  - Milojević, Marija
AU  - Racić, Vitomir
AU  - Marjanović, Miroslav
AU  - Nefovska-Danilović, Marija
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2923
AB  - Long-span cross-laminated timber (CLT) floors are typically an assembly of prefabricated CLT panels connected together on the site. The actual connections are commonly neglected in design calculations. Hence, a CLT floor is modelled either as a monolith slab or more frequently as a set of CLT panels with no connections at all. This paper presents a numerical study designed to examine the influence of two most common inter-panel connections , i.e. single surface spline and half-lapped joint, on vibration modes and vibration responses of a range of different CLT floors due to pedestrian-induced loading. Although the inter-panel connections are relatively complex in reality, they are modelled here as an equivalent 2D elastic strip between the CLT panels. This relatively simple yet robust model can be used with ease in design practice, regardless finite element (FE) software used to extract vibration modes of a CLT floor. The corresponding monolith floors and floors without inter-panel connections are studied for the comparison of the results. Vertical vibration responses are simulated for low-frequency and high-frequency floors using the corresponding walking force models given in a popular design guideline for footfall induced vibrations of civil engineering structures. Vibration responses were calculated for single pedestrian occupants and their walking paths parallel and perpendicular to the line of connection. The results showed that including the inter-panel connections in a FE model resulted in up to 2.5 higher RMS acceleration levels. Hence, the common practice of modelling CLT floors as monolith slabs or as a set of panels without connections should be left behind.
T2  - Engineering Structures
T1  - Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading
VL  - 277
DO  - 10.1016/j.engstruct.2022.115432
ER  - 

@article{
author = "Milojević, Marija and Racić, Vitomir and Marjanović, Miroslav and Nefovska-Danilović, Marija",
year = "2023",
abstract = "Long-span cross-laminated timber (CLT) floors are typically an assembly of prefabricated CLT panels connected together on the site. The actual connections are commonly neglected in design calculations. Hence, a CLT floor is modelled either as a monolith slab or more frequently as a set of CLT panels with no connections at all. This paper presents a numerical study designed to examine the influence of two most common inter-panel connections , i.e. single surface spline and half-lapped joint, on vibration modes and vibration responses of a range of different CLT floors due to pedestrian-induced loading. Although the inter-panel connections are relatively complex in reality, they are modelled here as an equivalent 2D elastic strip between the CLT panels. This relatively simple yet robust model can be used with ease in design practice, regardless finite element (FE) software used to extract vibration modes of a CLT floor. The corresponding monolith floors and floors without inter-panel connections are studied for the comparison of the results. Vertical vibration responses are simulated for low-frequency and high-frequency floors using the corresponding walking force models given in a popular design guideline for footfall induced vibrations of civil engineering structures. Vibration responses were calculated for single pedestrian occupants and their walking paths parallel and perpendicular to the line of connection. The results showed that including the inter-panel connections in a FE model resulted in up to 2.5 higher RMS acceleration levels. Hence, the common practice of modelling CLT floors as monolith slabs or as a set of panels without connections should be left behind.",
journal = "Engineering Structures",
title = "Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading",
volume = "277",
doi = "10.1016/j.engstruct.2022.115432"
}

Milojević, M., Racić, V., Marjanović, M.,& Nefovska-Danilović, M.. (2023). Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading. in Engineering Structures, 277.
https://doi.org/10.1016/j.engstruct.2022.115432

Milojević M, Racić V, Marjanović M, Nefovska-Danilović M. Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading. in Engineering Structures. 2023;277.
doi:10.1016/j.engstruct.2022.115432 .

Milojević, Marija, Racić, Vitomir, Marjanović, Miroslav, Nefovska-Danilović, Marija, "Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading" in Engineering Structures, 277 (2023),
https://doi.org/10.1016/j.engstruct.2022.115432 . .

TY  - CONF
AU  - Milojević, Marija
AU  - Ljaljević, Strahinja
AU  - Racić, Vitomir
AU  - Marjanović, Miroslav
AU  - Nefovska-Danilović, Marija
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2717
AB  - Trends in contemporary architecture towards open-plan spaces in commercial and residential
buildings have created problems with excessive vibrations of large-span floors induced by active
people. Solving vibration serviceability problems of as-built structures is costly and time-consuming.
Therefore, such a problem is the most efficiently and economically addressed at the
design stage. This paper presents software developed by the authors for assessing pedestrian-induced
vibrations of floors. The software is designed as a user-friendly graphical interface that
could be utilised in everyday design practice.
AB  - Trendovi u savremenoj arhitekturi, koji diktiraju projektovanje komercijalnih i stambenih zgrada
sa otvorenim prostorom, prouzrokovali su problem prekomernih vibracija međuspratnih
konstrukcija velikih raspona usled aktivnosti ljudi koji se po njima kreću. Saniranje prekomernih
vibracija već izgrađenih konstrukcija je skupo i vremenski zahtevno. Zbog toga je najefikasnije
i najekonomičnije ovaj problem eliminisati već u fazi projektovanja. U radu je predstavljen
softver za procenu vibracija međuspratnih konstrukcija izazvanih pešačkim opterećenjem,
jednostavnog grafičkog okruženja i pogodan za svakodnevnu upotrebu u projektovanju.
PB  - Association of Structural Engineers of Serbia
C3  - 16th Congress hosted by Association of Structural Engineers of Serbia
T1  - Software for calculation of pedestrian-induced vibration of floors
T1  - Softver za proračun vibracija međuspratnih konstrukcija usled dinamičke sile pešaka
EP  - 265
SP  - 256
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2717
ER  - 

@conference{
author = "Milojević, Marija and Ljaljević, Strahinja and Racić, Vitomir and Marjanović, Miroslav and Nefovska-Danilović, Marija",
year = "2022",
abstract = "Trends in contemporary architecture towards open-plan spaces in commercial and residential
buildings have created problems with excessive vibrations of large-span floors induced by active
people. Solving vibration serviceability problems of as-built structures is costly and time-consuming.
Therefore, such a problem is the most efficiently and economically addressed at the
design stage. This paper presents software developed by the authors for assessing pedestrian-induced
vibrations of floors. The software is designed as a user-friendly graphical interface that
could be utilised in everyday design practice., Trendovi u savremenoj arhitekturi, koji diktiraju projektovanje komercijalnih i stambenih zgrada
sa otvorenim prostorom, prouzrokovali su problem prekomernih vibracija međuspratnih
konstrukcija velikih raspona usled aktivnosti ljudi koji se po njima kreću. Saniranje prekomernih
vibracija već izgrađenih konstrukcija je skupo i vremenski zahtevno. Zbog toga je najefikasnije
i najekonomičnije ovaj problem eliminisati već u fazi projektovanja. U radu je predstavljen
softver za procenu vibracija međuspratnih konstrukcija izazvanih pešačkim opterećenjem,
jednostavnog grafičkog okruženja i pogodan za svakodnevnu upotrebu u projektovanju.",
publisher = "Association of Structural Engineers of Serbia",
journal = "16th Congress hosted by Association of Structural Engineers of Serbia",
title = "Software for calculation of pedestrian-induced vibration of floors, Softver za proračun vibracija međuspratnih konstrukcija usled dinamičke sile pešaka",
pages = "265-256",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2717"
}

Milojević, M., Ljaljević, S., Racić, V., Marjanović, M.,& Nefovska-Danilović, M.. (2022). Software for calculation of pedestrian-induced vibration of floors. in 16th Congress hosted by Association of Structural Engineers of Serbia
Association of Structural Engineers of Serbia., 256-265.
https://hdl.handle.net/21.15107/rcub_grafar_2717

Milojević M, Ljaljević S, Racić V, Marjanović M, Nefovska-Danilović M. Software for calculation of pedestrian-induced vibration of floors. in 16th Congress hosted by Association of Structural Engineers of Serbia. 2022;:256-265.
https://hdl.handle.net/21.15107/rcub_grafar_2717 .

Milojević, Marija, Ljaljević, Strahinja, Racić, Vitomir, Marjanović, Miroslav, Nefovska-Danilović, Marija, "Software for calculation of pedestrian-induced vibration of floors" in 16th Congress hosted by Association of Structural Engineers of Serbia (2022):256-265,
https://hdl.handle.net/21.15107/rcub_grafar_2717 .