Stability criteria for stainless steel equal-leg angle columns
Само за регистроване кориснике
2022
Конференцијски прилог (Рецензирана верзија)
,
THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE"
Метаподаци
Приказ свих података о документуАпстракт
Nowadays, the explicit codified criteria for design of centrically compressed stainless steel columns with equal-leg angle sections are absent in Europe. A comprehensive scientific investigation has therefore been undertaken at the University of Belgrade Faculty of Civil Engineering to provide benchmark data for the accuracy assessment of existing column design procedures stated in the European structural steel codes and to propose the new design criteria for stainless steel equal-leg angle columns. A series of experiments followed by advanced and realistic nonlinear finite element studies were performed on pin-ended columns with different lengths to account for both elastic and inelastic failure characteristics including minor-axis flexural and flexural-torsional buckling modes. The systematic experimental programme involved tensile material tests, geometric imperfection measurements, residual stress measurements and in total 63 column compression tests, considering two stainless stee...l alloys, lean duplex grade EN 1.4162 and austenitic grade EN 1.4301. Three different production routes, including cold-formed, hot-rolled and laser-welded angles were studied to quantify the effects of pronounced material nonlinearity and initial structural imperfections — residual stresses and geometric out-of-straightness on their buckling regimes and ultimate capacities. The behaviours and compressive capacities of the studied columns was confirmed to be dependent on not only the column slenderness, but also the elastic torsional-flexural buckling load-to-the elastic minor-axis flexural buckling load ratio. Similar to the previous research, it was demonstrated that in equal-leg angle columns, torsional and local buckling are essentially two designations of the same phenomenon. The research gathered a large column ultimate strength data bank that includes experimental values, also collected from the literature, and numerical values. The merits and accuracy of the proposed design criteria were assessed through the statistical data estimation and the reliability analysis to evaluate the safety factors and compare with the currently recommended by European stainless steel structural code.
Кључне речи:
Stainless steel / Equal-leg angle section / Cold-forming / Hot-rolling / Laser-welding / Flexural-torsional buckling / Flexural buckling / Experiment / Finite Element Modelling / Design.Извор:
Proceedings in Civil Engineering, THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2022 – Kolašin, Montenegro, 8-12 March 2022, 2022Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200092 (Универзитет у Београду, Грађевински факултет) (RS-MESTD-inst-2020-200092)
Институција/група
GraFarTY - CONF AU - Dobrić, Jelena PY - 2022 UR - https://grafar.grf.bg.ac.rs/handle/123456789/3379 AB - Nowadays, the explicit codified criteria for design of centrically compressed stainless steel columns with equal-leg angle sections are absent in Europe. A comprehensive scientific investigation has therefore been undertaken at the University of Belgrade Faculty of Civil Engineering to provide benchmark data for the accuracy assessment of existing column design procedures stated in the European structural steel codes and to propose the new design criteria for stainless steel equal-leg angle columns. A series of experiments followed by advanced and realistic nonlinear finite element studies were performed on pin-ended columns with different lengths to account for both elastic and inelastic failure characteristics including minor-axis flexural and flexural-torsional buckling modes. The systematic experimental programme involved tensile material tests, geometric imperfection measurements, residual stress measurements and in total 63 column compression tests, considering two stainless steel alloys, lean duplex grade EN 1.4162 and austenitic grade EN 1.4301. Three different production routes, including cold-formed, hot-rolled and laser-welded angles were studied to quantify the effects of pronounced material nonlinearity and initial structural imperfections — residual stresses and geometric out-of-straightness on their buckling regimes and ultimate capacities. The behaviours and compressive capacities of the studied columns was confirmed to be dependent on not only the column slenderness, but also the elastic torsional-flexural buckling load-to-the elastic minor-axis flexural buckling load ratio. Similar to the previous research, it was demonstrated that in equal-leg angle columns, torsional and local buckling are essentially two designations of the same phenomenon. The research gathered a large column ultimate strength data bank that includes experimental values, also collected from the literature, and numerical values. The merits and accuracy of the proposed design criteria were assessed through the statistical data estimation and the reliability analysis to evaluate the safety factors and compare with the currently recommended by European stainless steel structural code. C3 - Proceedings in Civil Engineering, THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2022 – Kolašin, Montenegro, 8-12 March 2022 T1 - Stability criteria for stainless steel equal-leg angle columns UR - https://hdl.handle.net/21.15107/rcub_grafar_3379 ER -
@conference{ author = "Dobrić, Jelena", year = "2022", abstract = "Nowadays, the explicit codified criteria for design of centrically compressed stainless steel columns with equal-leg angle sections are absent in Europe. A comprehensive scientific investigation has therefore been undertaken at the University of Belgrade Faculty of Civil Engineering to provide benchmark data for the accuracy assessment of existing column design procedures stated in the European structural steel codes and to propose the new design criteria for stainless steel equal-leg angle columns. A series of experiments followed by advanced and realistic nonlinear finite element studies were performed on pin-ended columns with different lengths to account for both elastic and inelastic failure characteristics including minor-axis flexural and flexural-torsional buckling modes. The systematic experimental programme involved tensile material tests, geometric imperfection measurements, residual stress measurements and in total 63 column compression tests, considering two stainless steel alloys, lean duplex grade EN 1.4162 and austenitic grade EN 1.4301. Three different production routes, including cold-formed, hot-rolled and laser-welded angles were studied to quantify the effects of pronounced material nonlinearity and initial structural imperfections — residual stresses and geometric out-of-straightness on their buckling regimes and ultimate capacities. The behaviours and compressive capacities of the studied columns was confirmed to be dependent on not only the column slenderness, but also the elastic torsional-flexural buckling load-to-the elastic minor-axis flexural buckling load ratio. Similar to the previous research, it was demonstrated that in equal-leg angle columns, torsional and local buckling are essentially two designations of the same phenomenon. The research gathered a large column ultimate strength data bank that includes experimental values, also collected from the literature, and numerical values. The merits and accuracy of the proposed design criteria were assessed through the statistical data estimation and the reliability analysis to evaluate the safety factors and compare with the currently recommended by European stainless steel structural code.", journal = "Proceedings in Civil Engineering, THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2022 – Kolašin, Montenegro, 8-12 March 2022", title = "Stability criteria for stainless steel equal-leg angle columns", url = "https://hdl.handle.net/21.15107/rcub_grafar_3379" }
Dobrić, J.. (2022). Stability criteria for stainless steel equal-leg angle columns. in Proceedings in Civil Engineering, THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2022 – Kolašin, Montenegro, 8-12 March 2022. https://hdl.handle.net/21.15107/rcub_grafar_3379
Dobrić J. Stability criteria for stainless steel equal-leg angle columns. in Proceedings in Civil Engineering, THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2022 – Kolašin, Montenegro, 8-12 March 2022. 2022;. https://hdl.handle.net/21.15107/rcub_grafar_3379 .
Dobrić, Jelena, "Stability criteria for stainless steel equal-leg angle columns" in Proceedings in Civil Engineering, THE 8th INTERNATIONAL CONFERENCE "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2022 – Kolašin, Montenegro, 8-12 March 2022 (2022), https://hdl.handle.net/21.15107/rcub_grafar_3379 .