TY  - CONF
AU  - Savatović, Siniša
AU  - Mišković, Zoran
AU  - Salatić, Ratko
AU  - Latinović-Krndija, Marina
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3466
AB  - The paper presents an experimental and analytical way of determining the impulse response of
a linear time-invariant damped system with one degree of freedom.
An experiment was conducted where the mass was excited by an impact load. Both the mass
acceleration and impact force values were recorded. The magnitude of the system's frequency
response was determined based on the recorded values, ensuring the relatively simple
identification of the system's basic parameters. Those parameters were used to define a suitable
mathematical model of the system, transfer function, and frequency response function in an
analytical form.
The impulse response of the system based on the recorded values of mass acceleration and impact
load is expressed as a discrete function. This function is determined by applying the inverse
discrete Fourier transform of the corresponding frequency response function.
The impulse response of the system, based on the mathematical model, is expressed as a
continuous function. This function is determined by applying the inverse Fourier transform of
the corresponding frequency response.
Finally, it was shown that the response of a system to arbitrary load could be determined by
convolving the impulse response of the system with the load function. Convolution of continuous
functions is difficult to perform, and it can be used only for the simplest problem and for
understanding the physical phenomenon. Discrete convolution has a practical utility because it
is easy to perform in some program languages like Matlab. However, discrete impulse response
has limitations depending on the test conditions.
PB  - University of Montenegro Faculty of Civil Engineering
C3  - The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
T1  - Analytic and experimental determination impulse response of single degree of freedom system
EP  - 288
SP  - 281
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3466
ER  - 

@conference{
author = "Savatović, Siniša and Mišković, Zoran and Salatić, Ratko and Latinović-Krndija, Marina",
year = "2024",
abstract = "The paper presents an experimental and analytical way of determining the impulse response of
a linear time-invariant damped system with one degree of freedom.
An experiment was conducted where the mass was excited by an impact load. Both the mass
acceleration and impact force values were recorded. The magnitude of the system's frequency
response was determined based on the recorded values, ensuring the relatively simple
identification of the system's basic parameters. Those parameters were used to define a suitable
mathematical model of the system, transfer function, and frequency response function in an
analytical form.
The impulse response of the system based on the recorded values of mass acceleration and impact
load is expressed as a discrete function. This function is determined by applying the inverse
discrete Fourier transform of the corresponding frequency response function.
The impulse response of the system, based on the mathematical model, is expressed as a
continuous function. This function is determined by applying the inverse Fourier transform of
the corresponding frequency response.
Finally, it was shown that the response of a system to arbitrary load could be determined by
convolving the impulse response of the system with the load function. Convolution of continuous
functions is difficult to perform, and it can be used only for the simplest problem and for
understanding the physical phenomenon. Discrete convolution has a practical utility because it
is easy to perform in some program languages like Matlab. However, discrete impulse response
has limitations depending on the test conditions.",
publisher = "University of Montenegro Faculty of Civil Engineering",
journal = "The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024",
title = "Analytic and experimental determination impulse response of single degree of freedom system",
pages = "288-281",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3466"
}

Savatović, S., Mišković, Z., Salatić, R.,& Latinović-Krndija, M.. (2024). Analytic and experimental determination impulse response of single degree of freedom system. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
University of Montenegro Faculty of Civil Engineering., 281-288.
https://hdl.handle.net/21.15107/rcub_grafar_3466

Savatović S, Mišković Z, Salatić R, Latinović-Krndija M. Analytic and experimental determination impulse response of single degree of freedom system. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024. 2024;:281-288.
https://hdl.handle.net/21.15107/rcub_grafar_3466 .

Savatović, Siniša, Mišković, Zoran, Salatić, Ratko, Latinović-Krndija, Marina, "Analytic and experimental determination impulse response of single degree of freedom system" in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024 (2024):281-288,
https://hdl.handle.net/21.15107/rcub_grafar_3466 .

TY  - CONF
AU  - Broćeta, Gordana
AU  - Savić, Aleksandar R.
AU  - Cumbo, Anđelko
AU  - Latinović Krndija, Marina
AU  - Lazić, Žarko
AU  - Lozo, Draženka
AU  - Volaš, Jovan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3289
AB  - Индустрија цемента сматра се једним од значајнијих узрочника емисије СО2. У циљу изналажења рјешења овој проблематици у раду се предлаже замјена 17,5% потребне количине цемента за производњу самоуграђујућег бетона минералним додацима. Експерименталним истраживањем на четири врсте самоуграђујућих бетона варирана је врста минералног додатка – бетон без минералних додатака, кречњачко брашно, електрофилтерски пепео и комбинација кречњачког брашна и електрофилтерског пепела. У том смислу наглашава се да је електрофилтерски пепео примијењен оригинално, какав је као нуспроизвод настао у термоелектрани, тј. није извршено његово просијавање или додатна обрада прије употребе. Резултати истраживања показују да примјена минералних додатака нема утицај на чврстоћу бетона при старости од 2 дана, али утиче на смањење чврстоће бетона при притиску за старости веће од 2 дана. При томе, значајнији утицај има електрофилтерски пепео. Ипак, тај утицај је у функцији времена опадајућег карактера, са тенденцијом да бетони са минералним додацима достигну чврстоће бетона без минералних додатака у старостима већим од 28 дана.
PB  - Arhitektonsko-građevinsko-geodetski fakultet Univerziteta u Banjoj Luci
C3  - Zbornik radova V naučno-stručnog simpozijuma Energetska efikasnost ENEF Banja Luka
T1  - Утицај Електрофилтерског Пепела на Чврстоћу  Cамоуграђујућег Бетона при Притиску
EP  - 86
SP  - 79
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3289
ER  - 

@conference{
author = "Broćeta, Gordana and Savić, Aleksandar R. and Cumbo, Anđelko and Latinović Krndija, Marina and Lazić, Žarko and Lozo, Draženka and Volaš, Jovan",
year = "2023",
abstract = "Индустрија цемента сматра се једним од значајнијих узрочника емисије СО2. У циљу изналажења рјешења овој проблематици у раду се предлаже замјена 17,5% потребне количине цемента за производњу самоуграђујућег бетона минералним додацима. Експерименталним истраживањем на четири врсте самоуграђујућих бетона варирана је врста минералног додатка – бетон без минералних додатака, кречњачко брашно, електрофилтерски пепео и комбинација кречњачког брашна и електрофилтерског пепела. У том смислу наглашава се да је електрофилтерски пепео примијењен оригинално, какав је као нуспроизвод настао у термоелектрани, тј. није извршено његово просијавање или додатна обрада прије употребе. Резултати истраживања показују да примјена минералних додатака нема утицај на чврстоћу бетона при старости од 2 дана, али утиче на смањење чврстоће бетона при притиску за старости веће од 2 дана. При томе, значајнији утицај има електрофилтерски пепео. Ипак, тај утицај је у функцији времена опадајућег карактера, са тенденцијом да бетони са минералним додацима достигну чврстоће бетона без минералних додатака у старостима већим од 28 дана.",
publisher = "Arhitektonsko-građevinsko-geodetski fakultet Univerziteta u Banjoj Luci",
journal = "Zbornik radova V naučno-stručnog simpozijuma Energetska efikasnost ENEF Banja Luka",
title = "Утицај Електрофилтерског Пепела на Чврстоћу  Cамоуграђујућег Бетона при Притиску",
pages = "86-79",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3289"
}

Broćeta, G., Savić, A. R., Cumbo, A., Latinović Krndija, M., Lazić, Ž., Lozo, D.,& Volaš, J.. (2023). Утицај Електрофилтерског Пепела на Чврстоћу  Cамоуграђујућег Бетона при Притиску. in Zbornik radova V naučno-stručnog simpozijuma Energetska efikasnost ENEF Banja Luka
Arhitektonsko-građevinsko-geodetski fakultet Univerziteta u Banjoj Luci., 79-86.
https://hdl.handle.net/21.15107/rcub_grafar_3289

Broćeta G, Savić AR, Cumbo A, Latinović Krndija M, Lazić Ž, Lozo D, Volaš J. Утицај Електрофилтерског Пепела на Чврстоћу  Cамоуграђујућег Бетона при Притиску. in Zbornik radova V naučno-stručnog simpozijuma Energetska efikasnost ENEF Banja Luka. 2023;:79-86.
https://hdl.handle.net/21.15107/rcub_grafar_3289 .

Broćeta, Gordana, Savić, Aleksandar R., Cumbo, Anđelko, Latinović Krndija, Marina, Lazić, Žarko, Lozo, Draženka, Volaš, Jovan, "Утицај Електрофилтерског Пепела на Чврстоћу  Cамоуграђујућег Бетона при Притиску" in Zbornik radova V naučno-stručnog simpozijuma Energetska efikasnost ENEF Banja Luka (2023):79-86,
https://hdl.handle.net/21.15107/rcub_grafar_3289 .

TY  - CONF
AU  - Mišković, Zoran
AU  - Latinović Krndija, Marina
AU  - Popović, Marko
AU  - Savatović, Siniša
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3232
AB  - When evaluating modal properties of lively structures as footbridges, numerical modelling
should be used with caution. This is due to model uncertainties mostly related to material
parameters, boundary conditions, the effects of the non-structural elements, and also other
inevitable differences between as-built and designed structures. Differences between the
dynamic behaviour of the as-built structure and the numerical finite element model are best
visible after performing vibration testing and modal properties identification based on
experimentally obtained results. Conclusions regarding reasons for these differences can be
useful for further understanding of vibrational behaviour of footbridge structures and can help
designers in better predicting dynamic properties of such structures in the design stage.
This paper describes a lively full-scale footbridge over the Vrbas river in Banja Luka, Prijecani
sub-area, Serbian Republic, Bosnia and Herzegovina, its modal properties estimation based on
ambient vibration measurements and numerical modelling.
Identification of modal properties was performed using Ambient Modal Testing applying
Multiple Test Setup Measurement Procedure and Frequency Domain Decomposition method.
The ambient vibration measurement technique for the subject footbridge, which gave a good
quality of the results obtained, is presented.
Analysis of the obtained experimental results is given, as well as their comparison with
numerically estimated values in the finite element model. Despite some irregular features of the
subject footbridge, correlation is obtained, and conclusions are made regarding the effects of
numerical model parameters on structural dynamic properties.
C3  - The 8th international conference "civil engineering – science and practice", Kolašin, Montenegro, 8-12 March
T1  - Modal analysis of the suspension footbridge over river Vrbas in Banja Luka
EP  - 256
SP  - 249
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3232
ER  - 

@conference{
author = "Mišković, Zoran and Latinović Krndija, Marina and Popović, Marko and Savatović, Siniša",
year = "2022",
abstract = "When evaluating modal properties of lively structures as footbridges, numerical modelling
should be used with caution. This is due to model uncertainties mostly related to material
parameters, boundary conditions, the effects of the non-structural elements, and also other
inevitable differences between as-built and designed structures. Differences between the
dynamic behaviour of the as-built structure and the numerical finite element model are best
visible after performing vibration testing and modal properties identification based on
experimentally obtained results. Conclusions regarding reasons for these differences can be
useful for further understanding of vibrational behaviour of footbridge structures and can help
designers in better predicting dynamic properties of such structures in the design stage.
This paper describes a lively full-scale footbridge over the Vrbas river in Banja Luka, Prijecani
sub-area, Serbian Republic, Bosnia and Herzegovina, its modal properties estimation based on
ambient vibration measurements and numerical modelling.
Identification of modal properties was performed using Ambient Modal Testing applying
Multiple Test Setup Measurement Procedure and Frequency Domain Decomposition method.
The ambient vibration measurement technique for the subject footbridge, which gave a good
quality of the results obtained, is presented.
Analysis of the obtained experimental results is given, as well as their comparison with
numerically estimated values in the finite element model. Despite some irregular features of the
subject footbridge, correlation is obtained, and conclusions are made regarding the effects of
numerical model parameters on structural dynamic properties.",
journal = "The 8th international conference "civil engineering – science and practice", Kolašin, Montenegro, 8-12 March",
title = "Modal analysis of the suspension footbridge over river Vrbas in Banja Luka",
pages = "256-249",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3232"
}

Mišković, Z., Latinović Krndija, M., Popović, M.,& Savatović, S.. (2022). Modal analysis of the suspension footbridge over river Vrbas in Banja Luka. in The 8th international conference "civil engineering – science and practice", Kolašin, Montenegro, 8-12 March, 249-256.
https://hdl.handle.net/21.15107/rcub_grafar_3232

Mišković Z, Latinović Krndija M, Popović M, Savatović S. Modal analysis of the suspension footbridge over river Vrbas in Banja Luka. in The 8th international conference "civil engineering – science and practice", Kolašin, Montenegro, 8-12 March. 2022;:249-256.
https://hdl.handle.net/21.15107/rcub_grafar_3232 .

Mišković, Zoran, Latinović Krndija, Marina, Popović, Marko, Savatović, Siniša, "Modal analysis of the suspension footbridge over river Vrbas in Banja Luka" in The 8th international conference "civil engineering – science and practice", Kolašin, Montenegro, 8-12 March (2022):249-256,
https://hdl.handle.net/21.15107/rcub_grafar_3232 .