TY  - CONF
AU  - Đurić, Dragana
AU  - Sretković, Branislav
AU  - Đurić, Uroš
AU  - Radić, Zoran
AU  - Vučković, Dejan
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2898
AB  - Istražni prostor obuhvata periferni deo Zemunskog lesnog platoa, koji čini značajni deo Zemuna. U prirodnim uslovima teren je okarakterisan kao stabilan, ali se usled prodora veće količine vode u tlo, naročito u dužem vremenskom periodu ili sa većim hidrauličkim pritiskom vode, mogu očekivati naknadna diferencijalna sleganja i deformacije prašinasto peskovitih lesnih naslaga. Usled kolapsa lesnog tla u Novogradskoj ulici u Zemunu, potpuno se urušio jedan prizemni stambeni objekat, oštećenja na dečjem obdaništu su bila tolika da je morao biti srušen, za dva veoma oštećena objekta su projektovane sanacione mere, a deformacije su registrovane na još 10 stambenih objekata, kao i na samoj saobraćajnici. Istraživano područje obuhvata 0,8 ha urbanog područja, gde su registrovane prsline, pukotine i ulegnuća na površini terena koja ukazuju na nejednako sleganje i tonjenje tla i pojavu procesa mehaničke sufozije u centralnom delu istražnog područja. Cilj geofizičkih istraživanja je bio da se registruju potencijalna prisustva podzemnih prostorija, tj. laguma, kao i degradiranih zona sa slabijim fizičko-mehaničkim svojstvima, koje su pretpostavljeni uzrok nestabilnosti tla i oštećenja stambenih objekata. Korišćena je refraktivna seizmometrijska metoda duž dva profila, pri čemu je akvizicija podataka vršena instrumentom RAS-24. Pozicije profila i njihove dužine su odabrane tako da se obuhvati i stabilna i nestabilna zona. Procena stabilnosti navednih zona vršena je na osnovu evidentiranja nastalih oštećenja na objektima u široj zoni profila. Obrada i modelovanje na osnovu podataka dobijenih terenskim merenjima postupkom seizmometrijske refrakcije, izvedene su programskim paketima RAS-24 (System Software i Rayfract), dok je optimizacija i vizuelizacija izvedena programskim paketom Golden Software (Surfer & Grapher). Za oba merena profila generisani su 2D modeli distribucije brzina longitudinalnih seizmoakustičkih talasa, u domenu konačnih elemenata. Analizom dobijenih 2D modela može se zaključiti da duž dva izvedena profila ne postoje indicije o postojanju većih zona smanjenja brzine primarnih talasa (Vp) koje su karakteristične za prisustvo šupljina, odnosno laguma. Međutim, moguće je uočiti razlike u distribuciji Vp na profilima. Na jednom od profila, koji je pozicioniran na strani ulice gde je dokumentovano i vizuelno uočljivo sleganje objekata, pojavljuje se veća debljina sredine sa smanjenom brzinom Vp. Navedeno može ukazivati na prisustvo zone sa izmenjenim i slabijim fizičko-mehaničkim svojstvima tla. Za potvrdu takvih pretpostavki neophodno je izvesti dodatna geotehnička i inženjersko-geološka ispitivanja.Ovaj rad finansiran je po „Ugovoru o realizaciji i finansiranju naučnoistraživačkog rada NIO u 2022. godini“, br. 451-03-68/2022-14/ 200126.
PB  - Srpsko geološko društvo
C3  - Zbornik apstrakata XVIII Kongres geologa Srbije, Divčibare
T1  - Geofizička istraživanja tonjenja lesa u Zemunu
EP  - 83
SP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2898
ER  - 

@conference{
author = "Đurić, Dragana and Sretković, Branislav and Đurić, Uroš and Radić, Zoran and Vučković, Dejan",
year = "2022",
abstract = "Istražni prostor obuhvata periferni deo Zemunskog lesnog platoa, koji čini značajni deo Zemuna. U prirodnim uslovima teren je okarakterisan kao stabilan, ali se usled prodora veće količine vode u tlo, naročito u dužem vremenskom periodu ili sa većim hidrauličkim pritiskom vode, mogu očekivati naknadna diferencijalna sleganja i deformacije prašinasto peskovitih lesnih naslaga. Usled kolapsa lesnog tla u Novogradskoj ulici u Zemunu, potpuno se urušio jedan prizemni stambeni objekat, oštećenja na dečjem obdaništu su bila tolika da je morao biti srušen, za dva veoma oštećena objekta su projektovane sanacione mere, a deformacije su registrovane na još 10 stambenih objekata, kao i na samoj saobraćajnici. Istraživano područje obuhvata 0,8 ha urbanog područja, gde su registrovane prsline, pukotine i ulegnuća na površini terena koja ukazuju na nejednako sleganje i tonjenje tla i pojavu procesa mehaničke sufozije u centralnom delu istražnog područja. Cilj geofizičkih istraživanja je bio da se registruju potencijalna prisustva podzemnih prostorija, tj. laguma, kao i degradiranih zona sa slabijim fizičko-mehaničkim svojstvima, koje su pretpostavljeni uzrok nestabilnosti tla i oštećenja stambenih objekata. Korišćena je refraktivna seizmometrijska metoda duž dva profila, pri čemu je akvizicija podataka vršena instrumentom RAS-24. Pozicije profila i njihove dužine su odabrane tako da se obuhvati i stabilna i nestabilna zona. Procena stabilnosti navednih zona vršena je na osnovu evidentiranja nastalih oštećenja na objektima u široj zoni profila. Obrada i modelovanje na osnovu podataka dobijenih terenskim merenjima postupkom seizmometrijske refrakcije, izvedene su programskim paketima RAS-24 (System Software i Rayfract), dok je optimizacija i vizuelizacija izvedena programskim paketom Golden Software (Surfer & Grapher). Za oba merena profila generisani su 2D modeli distribucije brzina longitudinalnih seizmoakustičkih talasa, u domenu konačnih elemenata. Analizom dobijenih 2D modela može se zaključiti da duž dva izvedena profila ne postoje indicije o postojanju većih zona smanjenja brzine primarnih talasa (Vp) koje su karakteristične za prisustvo šupljina, odnosno laguma. Međutim, moguće je uočiti razlike u distribuciji Vp na profilima. Na jednom od profila, koji je pozicioniran na strani ulice gde je dokumentovano i vizuelno uočljivo sleganje objekata, pojavljuje se veća debljina sredine sa smanjenom brzinom Vp. Navedeno može ukazivati na prisustvo zone sa izmenjenim i slabijim fizičko-mehaničkim svojstvima tla. Za potvrdu takvih pretpostavki neophodno je izvesti dodatna geotehnička i inženjersko-geološka ispitivanja.Ovaj rad finansiran je po „Ugovoru o realizaciji i finansiranju naučnoistraživačkog rada NIO u 2022. godini“, br. 451-03-68/2022-14/ 200126.",
publisher = "Srpsko geološko društvo",
journal = "Zbornik apstrakata XVIII Kongres geologa Srbije, Divčibare",
title = "Geofizička istraživanja tonjenja lesa u Zemunu",
pages = "83-82",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2898"
}

Đurić, D., Sretković, B., Đurić, U., Radić, Z.,& Vučković, D.. (2022). Geofizička istraživanja tonjenja lesa u Zemunu. in Zbornik apstrakata XVIII Kongres geologa Srbije, Divčibare
Srpsko geološko društvo., 82-83.
https://hdl.handle.net/21.15107/rcub_grafar_2898

Đurić D, Sretković B, Đurić U, Radić Z, Vučković D. Geofizička istraživanja tonjenja lesa u Zemunu. in Zbornik apstrakata XVIII Kongres geologa Srbije, Divčibare. 2022;:82-83.
https://hdl.handle.net/21.15107/rcub_grafar_2898 .

Đurić, Dragana, Sretković, Branislav, Đurić, Uroš, Radić, Zoran, Vučković, Dejan, "Geofizička istraživanja tonjenja lesa u Zemunu" in Zbornik apstrakata XVIII Kongres geologa Srbije, Divčibare (2022):82-83,
https://hdl.handle.net/21.15107/rcub_grafar_2898 .

TY  - JOUR
AU  - Lazarević, Luka
AU  - Vučković, Dejan
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2570
AB  - The quality of sleeper support plays an important role in static and
dynamic behavior of ballasted track. Sleepers in track should be well supported
in vertical, lateral and longitudinal direction. Irregular vertical support (along zaxis)
leads to significant increase in dynamic forces in the wheel-rail contact
(increase up to 80% comparing to the sections with regular sleeper support).
Irregular lateral support (along y-axis) reduces track lateral stability and
increases the susceptibility to track buckling. Longitudinal support (along xaxis)
is important for the behavior of the continuously welded rails. In the
previous research conducted by the authors, application of micro-tremor analysis
for determination of vertical sleeper support was considered. This paper
investigates its further application for assessment of sleeper support in lateral
and longitudinal direction. The obtained results are presented and discussed.
PB  - Springer, Cham
T2  - Advances in Intelligent Systems and Computing
T1  - Assessment of Sleeper Stability in Ballast Bed Using Micro-tremor Sampling Method
VL  - 982
DO  - 10.1007/978-3-030-19756-8_26
ER  - 

@article{
author = "Lazarević, Luka and Vučković, Dejan",
year = "2019",
abstract = "The quality of sleeper support plays an important role in static and
dynamic behavior of ballasted track. Sleepers in track should be well supported
in vertical, lateral and longitudinal direction. Irregular vertical support (along zaxis)
leads to significant increase in dynamic forces in the wheel-rail contact
(increase up to 80% comparing to the sections with regular sleeper support).
Irregular lateral support (along y-axis) reduces track lateral stability and
increases the susceptibility to track buckling. Longitudinal support (along xaxis)
is important for the behavior of the continuously welded rails. In the
previous research conducted by the authors, application of micro-tremor analysis
for determination of vertical sleeper support was considered. This paper
investigates its further application for assessment of sleeper support in lateral
and longitudinal direction. The obtained results are presented and discussed.",
publisher = "Springer, Cham",
journal = "Advances in Intelligent Systems and Computing",
title = "Assessment of Sleeper Stability in Ballast Bed Using Micro-tremor Sampling Method",
volume = "982",
doi = "10.1007/978-3-030-19756-8_26"
}

Lazarević, L.,& Vučković, D.. (2019). Assessment of Sleeper Stability in Ballast Bed Using Micro-tremor Sampling Method. in Advances in Intelligent Systems and Computing
Springer, Cham., 982.
https://doi.org/10.1007/978-3-030-19756-8_26

Lazarević L, Vučković D. Assessment of Sleeper Stability in Ballast Bed Using Micro-tremor Sampling Method. in Advances in Intelligent Systems and Computing. 2019;982.
doi:10.1007/978-3-030-19756-8_26 .

Lazarević, Luka, Vučković, Dejan, "Assessment of Sleeper Stability in Ballast Bed Using Micro-tremor Sampling Method" in Advances in Intelligent Systems and Computing, 982 (2019),
https://doi.org/10.1007/978-3-030-19756-8_26 . .

TY  - JOUR
AU  - Lazarević, Luka
AU  - Vučković, Dejan
AU  - Mićić, Milica
AU  - Popović, Zdenka
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/909
AB  - This article presents results obtained in the research conducted on railway infrastructure in Serbia, which aimed at prediction of substructure condition based on the analysis of track quality. It presents the results of seismic tomography application as non-destructive procedure for assessment of railway substructure condition. Track geometry quality was assessed according to analysis of longitudinal level data, which was recorded during regular track geometry inspections. Track section for application of seismic tomography was chosen on the basis of analysed track geometry data recorded during the regular track geometry inspections in 2006, 2008, 2009, 2012, 2013 and 2014. Tomographic imaging of railway platform on Test Section enabled the creation of two-dimensional finite element model, which was used for determination of propagation speed of seismic P-waves. Seismic tomography on Test Section, which is the part of the international railway line Belgrade–Vrbnica, was performed in 2014. Obtained tomographic image was discussed and compared to track geometry data recorded during the regular track geometry inspections.
PB  - SAGE Publications Ltd
T2  - Structural Health Monitoring
T1  - Application of seismic tomography for assessment of the railway substructure condition
DO  - 10.1177/1475921718774778
ER  - 

@article{
author = "Lazarević, Luka and Vučković, Dejan and Mićić, Milica and Popović, Zdenka",
year = "2018",
abstract = "This article presents results obtained in the research conducted on railway infrastructure in Serbia, which aimed at prediction of substructure condition based on the analysis of track quality. It presents the results of seismic tomography application as non-destructive procedure for assessment of railway substructure condition. Track geometry quality was assessed according to analysis of longitudinal level data, which was recorded during regular track geometry inspections. Track section for application of seismic tomography was chosen on the basis of analysed track geometry data recorded during the regular track geometry inspections in 2006, 2008, 2009, 2012, 2013 and 2014. Tomographic imaging of railway platform on Test Section enabled the creation of two-dimensional finite element model, which was used for determination of propagation speed of seismic P-waves. Seismic tomography on Test Section, which is the part of the international railway line Belgrade–Vrbnica, was performed in 2014. Obtained tomographic image was discussed and compared to track geometry data recorded during the regular track geometry inspections.",
publisher = "SAGE Publications Ltd",
journal = "Structural Health Monitoring",
title = "Application of seismic tomography for assessment of the railway substructure condition",
doi = "10.1177/1475921718774778"
}

Lazarević, L., Vučković, D., Mićić, M.,& Popović, Z.. (2018). Application of seismic tomography for assessment of the railway substructure condition. in Structural Health Monitoring
SAGE Publications Ltd..
https://doi.org/10.1177/1475921718774778

Lazarević L, Vučković D, Mićić M, Popović Z. Application of seismic tomography for assessment of the railway substructure condition. in Structural Health Monitoring. 2018;.
doi:10.1177/1475921718774778 .

Lazarević, Luka, Vučković, Dejan, Mićić, Milica, Popović, Zdenka, "Application of seismic tomography for assessment of the railway substructure condition" in Structural Health Monitoring (2018),
https://doi.org/10.1177/1475921718774778 . .

TY  - JOUR
AU  - Lazarević, Luka
AU  - Vučković, Dejan
AU  - Popović, Zdenka
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/753
AB  - An irregular geometry of the track can influence the safe passage of railway traffic. Therefore, maintenance activities on railways are mostly directed towards the correction of track geometry. It has been shown that unevenly supported and unsupported sleepers make major contributions to the effect of track geometry deterioration. In addition, irregular sleeper support conditions can contribute to ballast fouling, thus reducing its service life. Therefore, assessing the support conditions of the sleepers in a railway track is essential. This paper reviews methods that can be used for this purpose. Then, we propose a method for the assessment of sleeper support conditions and present results obtained in field investigations. The proposed method is based on sampling of the micro-tremor on sleepers and interpretation of obtained data. The obtained results prove that the proposed method is reliable and therefore usable in practice.
PB  - SAGE Publications Ltd
T2  - Proceedings of the Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit
T1  - Assessment of sleeper support conditions using micro-tremor analysis
EP  - 1841
IS  - 8
SP  - 1828
VL  - 230
DO  - 10.1177/0954409715615629
ER  - 

@article{
author = "Lazarević, Luka and Vučković, Dejan and Popović, Zdenka",
year = "2016",
abstract = "An irregular geometry of the track can influence the safe passage of railway traffic. Therefore, maintenance activities on railways are mostly directed towards the correction of track geometry. It has been shown that unevenly supported and unsupported sleepers make major contributions to the effect of track geometry deterioration. In addition, irregular sleeper support conditions can contribute to ballast fouling, thus reducing its service life. Therefore, assessing the support conditions of the sleepers in a railway track is essential. This paper reviews methods that can be used for this purpose. Then, we propose a method for the assessment of sleeper support conditions and present results obtained in field investigations. The proposed method is based on sampling of the micro-tremor on sleepers and interpretation of obtained data. The obtained results prove that the proposed method is reliable and therefore usable in practice.",
publisher = "SAGE Publications Ltd",
journal = "Proceedings of the Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit",
title = "Assessment of sleeper support conditions using micro-tremor analysis",
pages = "1841-1828",
number = "8",
volume = "230",
doi = "10.1177/0954409715615629"
}

Lazarević, L., Vučković, D.,& Popović, Z.. (2016). Assessment of sleeper support conditions using micro-tremor analysis. in Proceedings of the Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit
SAGE Publications Ltd., 230(8), 1828-1841.
https://doi.org/10.1177/0954409715615629

Lazarević L, Vučković D, Popović Z. Assessment of sleeper support conditions using micro-tremor analysis. in Proceedings of the Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit. 2016;230(8):1828-1841.
doi:10.1177/0954409715615629 .

Lazarević, Luka, Vučković, Dejan, Popović, Zdenka, "Assessment of sleeper support conditions using micro-tremor analysis" in Proceedings of the Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit, 230, no. 8 (2016):1828-1841,
https://doi.org/10.1177/0954409715615629 . .

TY  - CONF
AU  - Brčić, Stanko
AU  - Mišković, Zoran
AU  - Vučković, Dejan
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1246
PB  - Građevinski fakultet, Subotica
C3  - Međunarodna konferencija Savremena dostignuća u građevinarstvu 25
T1  - Propagation of vibrations at the Zemun side of the Zemun-Borča bridge
T1  - Propagacija vibracija na zemunskoj strani mosta Zemun-Borča
EP  - 160
SP  - 155
VL  - 30
DO  - 10.14415/konferencijaGFS2014.020
ER  - 

@conference{
author = "Brčić, Stanko and Mišković, Zoran and Vučković, Dejan",
year = "2014",
publisher = "Građevinski fakultet, Subotica",
journal = "Međunarodna konferencija Savremena dostignuća u građevinarstvu 25",
title = "Propagation of vibrations at the Zemun side of the Zemun-Borča bridge, Propagacija vibracija na zemunskoj strani mosta Zemun-Borča",
pages = "160-155",
volume = "30",
doi = "10.14415/konferencijaGFS2014.020"
}

Brčić, S., Mišković, Z.,& Vučković, D.. (2014). Propagation of vibrations at the Zemun side of the Zemun-Borča bridge. in Međunarodna konferencija Savremena dostignuća u građevinarstvu 25
Građevinski fakultet, Subotica., 30, 155-160.
https://doi.org/10.14415/konferencijaGFS2014.020

Brčić S, Mišković Z, Vučković D. Propagation of vibrations at the Zemun side of the Zemun-Borča bridge. in Međunarodna konferencija Savremena dostignuća u građevinarstvu 25. 2014;30:155-160.
doi:10.14415/konferencijaGFS2014.020 .

Brčić, Stanko, Mišković, Zoran, Vučković, Dejan, "Propagation of vibrations at the Zemun side of the Zemun-Borča bridge" in Međunarodna konferencija Savremena dostignuća u građevinarstvu 25, 30 (2014):155-160,
https://doi.org/10.14415/konferencijaGFS2014.020 . .