TY  - CONF
AU  - Filipović, Aljoša
AU  - Dobrić, Jelena
AU  - Marković, Zlatko
AU  - Baddoo, Nancy
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2610
AB  - Stainless  steel  sections  are  used  for  structures  in  aggressive  environments  where  the  greater material cost can often be justified in return for longer maintenance-free periods, for example in the water treatment, nuclear, petrochemical and food and beverage sectors. This paper presents a  comparative  imperfection  sensitivity  study  of  hot-rolled  and  laser-welded  pin-ended  equal angle  columns  made  of  austenitic  stainless  steel  grade  1.4301.  Although  the  initial  geometric imperfections  in  these  structural  elements  are  similar,  there  is  a  difference  in  the  initial  stress state  due  to  the  different  manufacturing  processes.  The  study  includes  three-dimensional  geometric imperfection measurements conducted by a laser scanner, and, in parallel residual stress measurements  performed  by  the  sectioning  method  using  water  jet  cutting.  The  overall  bow, camber,  and  twist  imperfections  are  determined  from  the  scanned  specimens.  In  addition,  the shapes of the residual stress patterns through the thickness of the angle leg are shown. Based on the findings related to imperfection distributions and amplitudes, a FE analysis is performed both on hot-rolled and laser-welded angles to study the influence of the variability of initial imperfections  on  compression  resistance.  The  separate  and  combined  effects  of  the  measured  residual stresses  and  initial  out-of-straightness  are  considered  and  the  reduction  in  the  buckling  resistances of initially straight angle columns is determined. The structural responses of hot-rolled and laser-welded columns are compared and discussed.
PB  - Ernst&Sohn
C3  - CE/Papers
T1  - Imperfection sensitivity study of hot-rolled and laser-welded stainless steel angle columns
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2610
ER  - 

@conference{
author = "Filipović, Aljoša and Dobrić, Jelena and Marković, Zlatko and Baddoo, Nancy",
year = "2021",
abstract = "Stainless  steel  sections  are  used  for  structures  in  aggressive  environments  where  the  greater material cost can often be justified in return for longer maintenance-free periods, for example in the water treatment, nuclear, petrochemical and food and beverage sectors. This paper presents a  comparative  imperfection  sensitivity  study  of  hot-rolled  and  laser-welded  pin-ended  equal angle  columns  made  of  austenitic  stainless  steel  grade  1.4301.  Although  the  initial  geometric imperfections  in  these  structural  elements  are  similar,  there  is  a  difference  in  the  initial  stress state  due  to  the  different  manufacturing  processes.  The  study  includes  three-dimensional  geometric imperfection measurements conducted by a laser scanner, and, in parallel residual stress measurements  performed  by  the  sectioning  method  using  water  jet  cutting.  The  overall  bow, camber,  and  twist  imperfections  are  determined  from  the  scanned  specimens.  In  addition,  the shapes of the residual stress patterns through the thickness of the angle leg are shown. Based on the findings related to imperfection distributions and amplitudes, a FE analysis is performed both on hot-rolled and laser-welded angles to study the influence of the variability of initial imperfections  on  compression  resistance.  The  separate  and  combined  effects  of  the  measured  residual stresses  and  initial  out-of-straightness  are  considered  and  the  reduction  in  the  buckling  resistances of initially straight angle columns is determined. The structural responses of hot-rolled and laser-welded columns are compared and discussed.",
publisher = "Ernst&Sohn",
journal = "CE/Papers",
title = "Imperfection sensitivity study of hot-rolled and laser-welded stainless steel angle columns",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2610"
}

Filipović, A., Dobrić, J., Marković, Z.,& Baddoo, N.. (2021). Imperfection sensitivity study of hot-rolled and laser-welded stainless steel angle columns. in CE/Papers
Ernst&Sohn..
https://hdl.handle.net/21.15107/rcub_grafar_2610

Filipović A, Dobrić J, Marković Z, Baddoo N. Imperfection sensitivity study of hot-rolled and laser-welded stainless steel angle columns. in CE/Papers. 2021;.
https://hdl.handle.net/21.15107/rcub_grafar_2610 .

Filipović, Aljoša, Dobrić, Jelena, Marković, Zlatko, Baddoo, Nancy, "Imperfection sensitivity study of hot-rolled and laser-welded stainless steel angle columns" in CE/Papers (2021),
https://hdl.handle.net/21.15107/rcub_grafar_2610 .

TY  - CONF
AU  - Dobrić, Jelena
AU  - Filipović, Aljoša
AU  - Baddoo, Nancy
AU  - Marković, Zlatko
AU  - Buđevac, Dragan
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2607
AB  - Pravila  za  proračun  centrično  pritisnutih  elemenata  ravnokrakog  L  poprečnog  preseka  od 
nerđajućeg čelika nisu eksplicitno definisana u važećem evropskom standardu SRPS EN 1993-
1-4.  Ovaj  rad  ukratko  prikazuje  rezultate  opsežnog  istraživanja  sprovedenog  na  ovom  tipu 
konstruktivnih  elemenata  sa  ciljem  definisanja  preporuka  za  njihov  proračun.  Na  osnovu 
sistematičnog  eksperimentalnog  istraživanja,  sprovedena  je  detaljna  numerička  analiza  i 
definisana  baza  podataka  graničnih  nosivosti  stubova.  Materijalna  i  geometrijska  nelinerana 
analiza obuhvatila je tri ključne legure nerđajućeg čelika, austenitnu, feritnu i dupleks leguru. 
Preporučene su krive izvijanja za kontrolu stabilnosti na fleksiono i fleksiono-torziono izvijanje 
u skladu sa evropskim proračunskim procedurama.
AB  - The  design  rules  for  centrically  compressed  stainless  steel  equal-leg  angle  members  are  not 
explicitly stated in the current European standard SRPS EN 1993-1-4. This paper summarizes 
the results of extensive research conducted on this type of structural elements aiming to define 
recommendations for their design. Based on a systematic experimental investigation, a detailed 
numerical analysis was performed, and a database of columns’ resistances were defined. Material 
and geometric nonlinear analysis included three key stainless steel alloys, austenitic, ferritic and 
duplex. The design curves for flexural and flexural–torsional buckling check have been proposed 
in accordance with European codified procedures.
PB  - Univerzitet u Beogradu Građevinski fakultet
PB  - Društvo građevinskih konstruktera Srbije
C3  - ASES International congress proceedings / Association of Structural Engineers of Serbia, 16th Congress
T1  - The new buckling curves for cold-formed stainless steel equal-leg angle columns
EP  - 510
SP  - 501
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2607
ER  - 

@conference{
author = "Dobrić, Jelena and Filipović, Aljoša and Baddoo, Nancy and Marković, Zlatko and Buđevac, Dragan",
year = "2021",
abstract = "Pravila  za  proračun  centrično  pritisnutih  elemenata  ravnokrakog  L  poprečnog  preseka  od 
nerđajućeg čelika nisu eksplicitno definisana u važećem evropskom standardu SRPS EN 1993-
1-4.  Ovaj  rad  ukratko  prikazuje  rezultate  opsežnog  istraživanja  sprovedenog  na  ovom  tipu 
konstruktivnih  elemenata  sa  ciljem  definisanja  preporuka  za  njihov  proračun.  Na  osnovu 
sistematičnog  eksperimentalnog  istraživanja,  sprovedena  je  detaljna  numerička  analiza  i 
definisana  baza  podataka  graničnih  nosivosti  stubova.  Materijalna  i  geometrijska  nelinerana 
analiza obuhvatila je tri ključne legure nerđajućeg čelika, austenitnu, feritnu i dupleks leguru. 
Preporučene su krive izvijanja za kontrolu stabilnosti na fleksiono i fleksiono-torziono izvijanje 
u skladu sa evropskim proračunskim procedurama., The  design  rules  for  centrically  compressed  stainless  steel  equal-leg  angle  members  are  not 
explicitly stated in the current European standard SRPS EN 1993-1-4. This paper summarizes 
the results of extensive research conducted on this type of structural elements aiming to define 
recommendations for their design. Based on a systematic experimental investigation, a detailed 
numerical analysis was performed, and a database of columns’ resistances were defined. Material 
and geometric nonlinear analysis included three key stainless steel alloys, austenitic, ferritic and 
duplex. The design curves for flexural and flexural–torsional buckling check have been proposed 
in accordance with European codified procedures.",
publisher = "Univerzitet u Beogradu Građevinski fakultet, Društvo građevinskih konstruktera Srbije",
journal = "ASES International congress proceedings / Association of Structural Engineers of Serbia, 16th Congress",
title = "The new buckling curves for cold-formed stainless steel equal-leg angle columns",
pages = "510-501",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2607"
}

Dobrić, J., Filipović, A., Baddoo, N., Marković, Z.,& Buđevac, D.. (2021). The new buckling curves for cold-formed stainless steel equal-leg angle columns. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 16th Congress
Univerzitet u Beogradu Građevinski fakultet., 501-510.
https://hdl.handle.net/21.15107/rcub_grafar_2607

Dobrić J, Filipović A, Baddoo N, Marković Z, Buđevac D. The new buckling curves for cold-formed stainless steel equal-leg angle columns. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 16th Congress. 2021;:501-510.
https://hdl.handle.net/21.15107/rcub_grafar_2607 .

Dobrić, Jelena, Filipović, Aljoša, Baddoo, Nancy, Marković, Zlatko, Buđevac, Dragan, "The new buckling curves for cold-formed stainless steel equal-leg angle columns" in ASES International congress proceedings / Association of Structural Engineers of Serbia, 16th Congress (2021):501-510,
https://hdl.handle.net/21.15107/rcub_grafar_2607 .

TY  - JOUR
AU  - Dobrić, Jelena
AU  - Filipović, Aljoša
AU  - Baddoo, Nancy
AU  - Marković, Zlatko
AU  - Buđevac, Dragan
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2418
AB  - The  design  rules  for  centrically  compressed  stainless  steel  equal-leg  angle 
members are not explicitly stated in the current European standard SRPS EN 1993-
1-4. This paper summarizes the results of extensive research conducted on this type 
of structural elements aiming to define recommendations for their design. Based on 
a  systematic  experimental  investigation,  a  detailed  numerical  analysis  was 
performed,  and  a  database  of  columns’  resistances  were  defined.  Material  and 
geometric nonlinear analysis included three key stainless steel alloys, austenitic, 
ferritic  and duplex.  The  design  curves  for  flexural  and  flexural–torsional  buckling 
check have been proposed in accordance with European codified procedures.
T2  - Building Materials and Structures
T1  - The new buckling curves for cold-formed stainless steel equal-leg angle columns
IS  - 64
DO  - 10.5937/GRMK2103171D
ER  - 

@article{
author = "Dobrić, Jelena and Filipović, Aljoša and Baddoo, Nancy and Marković, Zlatko and Buđevac, Dragan",
year = "2021",
abstract = "The  design  rules  for  centrically  compressed  stainless  steel  equal-leg  angle 
members are not explicitly stated in the current European standard SRPS EN 1993-
1-4. This paper summarizes the results of extensive research conducted on this type 
of structural elements aiming to define recommendations for their design. Based on 
a  systematic  experimental  investigation,  a  detailed  numerical  analysis  was 
performed,  and  a  database  of  columns’  resistances  were  defined.  Material  and 
geometric nonlinear analysis included three key stainless steel alloys, austenitic, 
ferritic  and duplex.  The  design  curves  for  flexural  and  flexural–torsional  buckling 
check have been proposed in accordance with European codified procedures.",
journal = "Building Materials and Structures",
title = "The new buckling curves for cold-formed stainless steel equal-leg angle columns",
number = "64",
doi = "10.5937/GRMK2103171D"
}

Dobrić, J., Filipović, A., Baddoo, N., Marković, Z.,& Buđevac, D.. (2021). The new buckling curves for cold-formed stainless steel equal-leg angle columns. in Building Materials and Structures(64).
https://doi.org/10.5937/GRMK2103171D

Dobrić J, Filipović A, Baddoo N, Marković Z, Buđevac D. The new buckling curves for cold-formed stainless steel equal-leg angle columns. in Building Materials and Structures. 2021;(64).
doi:10.5937/GRMK2103171D .

Dobrić, Jelena, Filipović, Aljoša, Baddoo, Nancy, Marković, Zlatko, Buđevac, Dragan, "The new buckling curves for cold-formed stainless steel equal-leg angle columns" in Building Materials and Structures, no. 64 (2021),
https://doi.org/10.5937/GRMK2103171D . .

TY  - JOUR
AU  - Filipović, Aljoša
AU  - Dobrić, Jelena
AU  - Buđevac, Dragan
AU  - Fric, Nenad
AU  - Baddoo, Nancy
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2395
AB  - Substantial research has been conducted in the last years into the structural responses of cold-formed and hot-rolled stainless steel equal-leg angle columns, whereas there is no experimental data on laser-welded stainless steel angle columns despite these sections being increasingly used in the modern construction industry. To fill this gap and provide benchmarks for design, a comprehensive experimental investigation into the structural strength and stability of laser-welded austenitic stainless steel equal-leg angle columns under pure axial compression was performed and described in this paper. A series of laboratory tests, performing on two test groups of specimens with nominal dimensions of 60 × 60 × 6 mm and 100 × 100 × 10 mm and different lengths, involved 6 stub column tests and 20 global buckling tests together with measurements on material properties, initial local geometric imperfections and residual stresses. The experimental observations reveal that the column ultimate capacity and prevalent failure mode — major-axis flexural-torsional buckling and minor-axis flexural buckling — are highly dependent on the column slenderness and initial imperfections. The full load-lateral displacement, load-torsional rotation and load-axial strain responses of the specimens were fully reported and discussed. The results were employed to evaluate the accuracy of the current European and North American stainless steel design standards. The evaluation results revealed that the codified design procedures yield conservative resistance predictions of laser-welded stainless steel equal-leg angle columns, showing a prospective for their modification and improvement by providing more optimized and realistic results in design considering the actual residual stress distributions, material nonlinearity and strain hardening.
T2  - Thin-Walled Structures
T1  - Experimental study of laser-welded stainless steel angle columns
IS  - 164
DO  - 10.1016/j.tws.2021.107777
ER  - 

@article{
author = "Filipović, Aljoša and Dobrić, Jelena and Buđevac, Dragan and Fric, Nenad and Baddoo, Nancy",
year = "2021",
abstract = "Substantial research has been conducted in the last years into the structural responses of cold-formed and hot-rolled stainless steel equal-leg angle columns, whereas there is no experimental data on laser-welded stainless steel angle columns despite these sections being increasingly used in the modern construction industry. To fill this gap and provide benchmarks for design, a comprehensive experimental investigation into the structural strength and stability of laser-welded austenitic stainless steel equal-leg angle columns under pure axial compression was performed and described in this paper. A series of laboratory tests, performing on two test groups of specimens with nominal dimensions of 60 × 60 × 6 mm and 100 × 100 × 10 mm and different lengths, involved 6 stub column tests and 20 global buckling tests together with measurements on material properties, initial local geometric imperfections and residual stresses. The experimental observations reveal that the column ultimate capacity and prevalent failure mode — major-axis flexural-torsional buckling and minor-axis flexural buckling — are highly dependent on the column slenderness and initial imperfections. The full load-lateral displacement, load-torsional rotation and load-axial strain responses of the specimens were fully reported and discussed. The results were employed to evaluate the accuracy of the current European and North American stainless steel design standards. The evaluation results revealed that the codified design procedures yield conservative resistance predictions of laser-welded stainless steel equal-leg angle columns, showing a prospective for their modification and improvement by providing more optimized and realistic results in design considering the actual residual stress distributions, material nonlinearity and strain hardening.",
journal = "Thin-Walled Structures",
title = "Experimental study of laser-welded stainless steel angle columns",
number = "164",
doi = "10.1016/j.tws.2021.107777"
}

Filipović, A., Dobrić, J., Buđevac, D., Fric, N.,& Baddoo, N.. (2021). Experimental study of laser-welded stainless steel angle columns. in Thin-Walled Structures(164).
https://doi.org/10.1016/j.tws.2021.107777

Filipović A, Dobrić J, Buđevac D, Fric N, Baddoo N. Experimental study of laser-welded stainless steel angle columns. in Thin-Walled Structures. 2021;(164).
doi:10.1016/j.tws.2021.107777 .

Filipović, Aljoša, Dobrić, Jelena, Buđevac, Dragan, Fric, Nenad, Baddoo, Nancy, "Experimental study of laser-welded stainless steel angle columns" in Thin-Walled Structures, no. 164 (2021),
https://doi.org/10.1016/j.tws.2021.107777 . .

TY  - JOUR
AU  - Filipović, Aljoša
AU  - Dobrić, Jelena
AU  - Baddoo, Nancy
AU  - Primož, Može
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2393
AB  - This paper reports on experiments addressing the buckling and collapse behaviour of pin-ended hot-rolled stainless steel equal-leg angle columns under pure axial compression, aiming to provide reliable experimental data needed to develop explicit design guidelines for hot-rolled stainless steel angle columns currently absent in European standard. The systematic experimental programme included two test groups of specimens with nominal dimensions of 60 × 60 × 6 mm and 100 × 100 × 10 mm produced from austenitic grade EN 1.4301, and involved tensile material tests, geometric imperfection measurements, residual stress measurements, 6 stub column tests and 20 global compression tests. A wide range of column slenderness ratios was carefully selected to account for both elastic and inelastic failure characteristics including flexural and flexural-torsional modes and the influence of the legs’ width-to-thickness ratios. The test setup and procedure together with the key experimental results and characterised failure modes, were fully reported and discussed. The test results were compared with those predicted using the design methods for compressed stainless steel angle columns provided in European and North American standards. It was observed that the specifications offer conservative strength predictions of the tested columns, primarily due to the lower distribution of initial geometric imperfections of tested columns in comparison with the permissible fabrication tolerances that are usually used as the basis of stability checks in codified design.
T2  - Thin-Walled Structures
T1  - Experimental response of hot-rolled stainless steel angle columns
IS  - 163
DO  - 10.1016/j.tws.2021.107659
ER  - 

@article{
author = "Filipović, Aljoša and Dobrić, Jelena and Baddoo, Nancy and Primož, Može",
year = "2021",
abstract = "This paper reports on experiments addressing the buckling and collapse behaviour of pin-ended hot-rolled stainless steel equal-leg angle columns under pure axial compression, aiming to provide reliable experimental data needed to develop explicit design guidelines for hot-rolled stainless steel angle columns currently absent in European standard. The systematic experimental programme included two test groups of specimens with nominal dimensions of 60 × 60 × 6 mm and 100 × 100 × 10 mm produced from austenitic grade EN 1.4301, and involved tensile material tests, geometric imperfection measurements, residual stress measurements, 6 stub column tests and 20 global compression tests. A wide range of column slenderness ratios was carefully selected to account for both elastic and inelastic failure characteristics including flexural and flexural-torsional modes and the influence of the legs’ width-to-thickness ratios. The test setup and procedure together with the key experimental results and characterised failure modes, were fully reported and discussed. The test results were compared with those predicted using the design methods for compressed stainless steel angle columns provided in European and North American standards. It was observed that the specifications offer conservative strength predictions of the tested columns, primarily due to the lower distribution of initial geometric imperfections of tested columns in comparison with the permissible fabrication tolerances that are usually used as the basis of stability checks in codified design.",
journal = "Thin-Walled Structures",
title = "Experimental response of hot-rolled stainless steel angle columns",
number = "163",
doi = "10.1016/j.tws.2021.107659"
}

Filipović, A., Dobrić, J., Baddoo, N.,& Primož, M.. (2021). Experimental response of hot-rolled stainless steel angle columns. in Thin-Walled Structures(163).
https://doi.org/10.1016/j.tws.2021.107659

Filipović A, Dobrić J, Baddoo N, Primož M. Experimental response of hot-rolled stainless steel angle columns. in Thin-Walled Structures. 2021;(163).
doi:10.1016/j.tws.2021.107659 .

Filipović, Aljoša, Dobrić, Jelena, Baddoo, Nancy, Primož, Može, "Experimental response of hot-rolled stainless steel angle columns" in Thin-Walled Structures, no. 163 (2021),
https://doi.org/10.1016/j.tws.2021.107659 . .

TY  - JOUR
AU  - Dobrić, Jelena
AU  - Filipović, Aljoša
AU  - Baddoo, Nancy
AU  - Buđevac, Dragan
AU  - Rossi, Barbara
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2394
AB  - This paper explores an attempt to investigate the structural behaviour and design of equal-leg stainless steel angle columns fabricated by the laser-welding of individual hot-rolled plates and by hot-rolling process. The studies cover columns with pin-ended boundary conditions exposed to pure axial compression. An advanced and realistic finite element model able to replicate the buckling features of stainless steel angle columns is developed and validated against available experiments collected in the literature. Employing the validated finite element model, quantitative numerical parametric studies, considering minor-axis flexural buckling, as well as flexural-torsional buckling, are performed. Based on comprehensive benchmark data, the accuracy, safety and applicability of the existing column design procedures provided in the European and North American structural stainless steel codes are assessed. The evaluation results reveal that the North American codified design procedures lead to conservative and scattered resistance predictions, thereby demonstrating a need for their improvement. As a result of conducted studies, the new criteria for design of pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns are proposed. Their suitability for inclusion in the European structural stainless steel design code is confirmed by statistical reliability analyses in accordance with EN 1990.
T2  - Thin-Walled Structures
T1  - Design criteria for pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns
IS  - 167
DO  - 10.1016/j.tws.2021.108175
ER  - 

@article{
author = "Dobrić, Jelena and Filipović, Aljoša and Baddoo, Nancy and Buđevac, Dragan and Rossi, Barbara",
year = "2021",
abstract = "This paper explores an attempt to investigate the structural behaviour and design of equal-leg stainless steel angle columns fabricated by the laser-welding of individual hot-rolled plates and by hot-rolling process. The studies cover columns with pin-ended boundary conditions exposed to pure axial compression. An advanced and realistic finite element model able to replicate the buckling features of stainless steel angle columns is developed and validated against available experiments collected in the literature. Employing the validated finite element model, quantitative numerical parametric studies, considering minor-axis flexural buckling, as well as flexural-torsional buckling, are performed. Based on comprehensive benchmark data, the accuracy, safety and applicability of the existing column design procedures provided in the European and North American structural stainless steel codes are assessed. The evaluation results reveal that the North American codified design procedures lead to conservative and scattered resistance predictions, thereby demonstrating a need for their improvement. As a result of conducted studies, the new criteria for design of pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns are proposed. Their suitability for inclusion in the European structural stainless steel design code is confirmed by statistical reliability analyses in accordance with EN 1990.",
journal = "Thin-Walled Structures",
title = "Design criteria for pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns",
number = "167",
doi = "10.1016/j.tws.2021.108175"
}

Dobrić, J., Filipović, A., Baddoo, N., Buđevac, D.,& Rossi, B.. (2021). Design criteria for pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns. in Thin-Walled Structures(167).
https://doi.org/10.1016/j.tws.2021.108175

Dobrić J, Filipović A, Baddoo N, Buđevac D, Rossi B. Design criteria for pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns. in Thin-Walled Structures. 2021;(167).
doi:10.1016/j.tws.2021.108175 .

Dobrić, Jelena, Filipović, Aljoša, Baddoo, Nancy, Buđevac, Dragan, Rossi, Barbara, "Design criteria for pin-ended hot-rolled and laser-welded stainless steel equal-leg angle columns" in Thin-Walled Structures, no. 167 (2021),
https://doi.org/10.1016/j.tws.2021.108175 . .

TY  - JOUR
AU  - Dobrić, Jelena
AU  - Filipović, Aljoša
AU  - Marković, Zlatko
AU  - Baddoo, Nancy
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2096
AB  - In this paper, the structural stability and compressive capacity of pin-ended cold-formed stainless steel angle columns with different slenderness were experimentally investigated. The experimental programme was performed on press-braked lean duplex stainless steel equal-leg angle sections with nominal dimensions of 80 × 80 × 4 mm, and involved material testing, initial imperfection measurements and 11 column tests. The test setup and procedure, together with the key experimental results, axial load vs. lateral deflections, axial load vs. torsional rotations and characterised failure modes, were fully reported and analysed. The experimental observations reveal that the failure mode type, including local/torsional, flexural-torsional and flexural effects, is highly dependent on the column's slenderness and initial imperfections. The measured compressive strengths were compared with the resistance predictions determined according to European and Australia/New Zealand codified design procedures. It was found that experimentally obtained ultimate capacities are significantly higher than those calculated according to the specifications. However, the database of test results is still quite limited, and a further research is needed to amplify the data needed to enable a more precise assessment of the codified procedures.
T2  - Thin-Walled Structures
T1  - Structural response to axial testing of cold-formed stainless steel angle columns
VL  - 156
DO  - https://doi.org/10.1016/j.tws.2020.106986
ER  - 

@article{
author = "Dobrić, Jelena and Filipović, Aljoša and Marković, Zlatko and Baddoo, Nancy",
year = "2020",
abstract = "In this paper, the structural stability and compressive capacity of pin-ended cold-formed stainless steel angle columns with different slenderness were experimentally investigated. The experimental programme was performed on press-braked lean duplex stainless steel equal-leg angle sections with nominal dimensions of 80 × 80 × 4 mm, and involved material testing, initial imperfection measurements and 11 column tests. The test setup and procedure, together with the key experimental results, axial load vs. lateral deflections, axial load vs. torsional rotations and characterised failure modes, were fully reported and analysed. The experimental observations reveal that the failure mode type, including local/torsional, flexural-torsional and flexural effects, is highly dependent on the column's slenderness and initial imperfections. The measured compressive strengths were compared with the resistance predictions determined according to European and Australia/New Zealand codified design procedures. It was found that experimentally obtained ultimate capacities are significantly higher than those calculated according to the specifications. However, the database of test results is still quite limited, and a further research is needed to amplify the data needed to enable a more precise assessment of the codified procedures.",
journal = "Thin-Walled Structures",
title = "Structural response to axial testing of cold-formed stainless steel angle columns",
volume = "156",
doi = "https://doi.org/10.1016/j.tws.2020.106986"
}

Dobrić, J., Filipović, A., Marković, Z.,& Baddoo, N.. (2020). Structural response to axial testing of cold-formed stainless steel angle columns. in Thin-Walled Structures, 156.
https://doi.org/https://doi.org/10.1016/j.tws.2020.106986

Dobrić J, Filipović A, Marković Z, Baddoo N. Structural response to axial testing of cold-formed stainless steel angle columns. in Thin-Walled Structures. 2020;156.
doi:https://doi.org/10.1016/j.tws.2020.106986 .

Dobrić, Jelena, Filipović, Aljoša, Marković, Zlatko, Baddoo, Nancy, "Structural response to axial testing of cold-formed stainless steel angle columns" in Thin-Walled Structures, 156 (2020),
https://doi.org/https://doi.org/10.1016/j.tws.2020.106986 . .

TY  - JOUR
AU  - Dobrić, Jelena
AU  - Filipović, Aljoša
AU  - Baddoo, Nancy
AU  - Marković, Zlatko
AU  - Buđevac, Dragan
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2129
AB  - Currently, there is still no explicit design approach for cold-formed stainless steel columns with equal-leg angle sections in Europe. A comprehensive numerical investigation, validated by the available experiments collected in the literature, has therefore been undertaken to provide benchmark data for the assessment of design procedures for cold-formed stainless steel angle columns currently adopted in European and Australian codes. Minor-axis flexural buckling, as well as flexural-torsional buckling have been considered. In total, 27 different cross-section sizes covering both slender and non-slender sections, and a wide range of column slenderness values have been examined including austenitic, duplex and ferritic grades. On the basis of the experimental and numerical results, new design recommendations for cold-formed stainless steel equal-leg angle columns have been made per family of stainless steel. The suitability of the proposals was confirmed by means of a reliability analysis.
T2  - Thin-Walled Structures
T1  - Design procedures for cold-formed stainless steel equal-leg angle columns
DO  - https://doi.org/10.1016/j.tws.2020.107210
ER  - 

@article{
author = "Dobrić, Jelena and Filipović, Aljoša and Baddoo, Nancy and Marković, Zlatko and Buđevac, Dragan",
year = "2020",
abstract = "Currently, there is still no explicit design approach for cold-formed stainless steel columns with equal-leg angle sections in Europe. A comprehensive numerical investigation, validated by the available experiments collected in the literature, has therefore been undertaken to provide benchmark data for the assessment of design procedures for cold-formed stainless steel angle columns currently adopted in European and Australian codes. Minor-axis flexural buckling, as well as flexural-torsional buckling have been considered. In total, 27 different cross-section sizes covering both slender and non-slender sections, and a wide range of column slenderness values have been examined including austenitic, duplex and ferritic grades. On the basis of the experimental and numerical results, new design recommendations for cold-formed stainless steel equal-leg angle columns have been made per family of stainless steel. The suitability of the proposals was confirmed by means of a reliability analysis.",
journal = "Thin-Walled Structures",
title = "Design procedures for cold-formed stainless steel equal-leg angle columns",
doi = "https://doi.org/10.1016/j.tws.2020.107210"
}

Dobrić, J., Filipović, A., Baddoo, N., Marković, Z.,& Buđevac, D.. (2020). Design procedures for cold-formed stainless steel equal-leg angle columns. in Thin-Walled Structures.
https://doi.org/https://doi.org/10.1016/j.tws.2020.107210

Dobrić J, Filipović A, Baddoo N, Marković Z, Buđevac D. Design procedures for cold-formed stainless steel equal-leg angle columns. in Thin-Walled Structures. 2020;.
doi:https://doi.org/10.1016/j.tws.2020.107210 .

Dobrić, Jelena, Filipović, Aljoša, Baddoo, Nancy, Marković, Zlatko, Buđevac, Dragan, "Design procedures for cold-formed stainless steel equal-leg angle columns" in Thin-Walled Structures (2020),
https://doi.org/https://doi.org/10.1016/j.tws.2020.107210 . .

TY  - CONF
AU  - Filipović, Aljoša
AU  - Dobrić, Jelena
AU  - Marković, Zlatko A.
AU  - Spremić, Milan B.
AU  - Fric, Nenad
AU  - Baddoo, Nancy
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1964
AB  - This paper presents the experimental programme of an extensive research project that deals with analysing the behaviour of compressed stainless steel columns with equal angle sections. The research focuses on different material and geometrical parameters of pin-ended angle columns produced from austenitic and lean-duplex stainless steel alloys. To assess the influences of initial imperfections on column compressive resistance caused by different manufacturing procedures, three types of angle products are included: cold-formed, hot-rolled and laser-welded sections. In order to obtain both elastic and inelastic ultimate responses, including flexural and torsional-flexural buckling modes, the lengths and cross-section geometries of specimens are selected to cover non-slender sections and slender sections covering the entire wide slenderness range. The experimental programme covers all relevant tests: 15 tensile coupon tests, 15 stub-column tests, 48 overall buckling tests on slender columns and 2 residual stress
tests, including measurements of initial geometric imperfections. The purpose of these experiments is to provide a reliable database to determine design rules for angle members and extend the scope of procedures currently codified in EN 1993-1-4 (2015), not only to conventional angle profiles, but also to contemporary products such as laser-welded angles.
C3  - International Colloquium on Stability and Ductility of Steel Structures
T1  - Experimental investigation of compressed stainless steel angle columns
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1964
ER  - 

@conference{
author = "Filipović, Aljoša and Dobrić, Jelena and Marković, Zlatko A. and Spremić, Milan B. and Fric, Nenad and Baddoo, Nancy",
year = "2019",
abstract = "This paper presents the experimental programme of an extensive research project that deals with analysing the behaviour of compressed stainless steel columns with equal angle sections. The research focuses on different material and geometrical parameters of pin-ended angle columns produced from austenitic and lean-duplex stainless steel alloys. To assess the influences of initial imperfections on column compressive resistance caused by different manufacturing procedures, three types of angle products are included: cold-formed, hot-rolled and laser-welded sections. In order to obtain both elastic and inelastic ultimate responses, including flexural and torsional-flexural buckling modes, the lengths and cross-section geometries of specimens are selected to cover non-slender sections and slender sections covering the entire wide slenderness range. The experimental programme covers all relevant tests: 15 tensile coupon tests, 15 stub-column tests, 48 overall buckling tests on slender columns and 2 residual stress
tests, including measurements of initial geometric imperfections. The purpose of these experiments is to provide a reliable database to determine design rules for angle members and extend the scope of procedures currently codified in EN 1993-1-4 (2015), not only to conventional angle profiles, but also to contemporary products such as laser-welded angles.",
journal = "International Colloquium on Stability and Ductility of Steel Structures",
title = "Experimental investigation of compressed stainless steel angle columns",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1964"
}

Filipović, A., Dobrić, J., Marković, Z. A., Spremić, M. B., Fric, N.,& Baddoo, N.. (2019). Experimental investigation of compressed stainless steel angle columns. in International Colloquium on Stability and Ductility of Steel Structures.
https://hdl.handle.net/21.15107/rcub_grafar_1964

Filipović A, Dobrić J, Marković ZA, Spremić MB, Fric N, Baddoo N. Experimental investigation of compressed stainless steel angle columns. in International Colloquium on Stability and Ductility of Steel Structures. 2019;.
https://hdl.handle.net/21.15107/rcub_grafar_1964 .

Filipović, Aljoša, Dobrić, Jelena, Marković, Zlatko A., Spremić, Milan B., Fric, Nenad, Baddoo, Nancy, "Experimental investigation of compressed stainless steel angle columns" in International Colloquium on Stability and Ductility of Steel Structures (2019),
https://hdl.handle.net/21.15107/rcub_grafar_1964 .