Abstract
Numerical simulations have been widely applied, for the determination of the resistance of steel structural elements, when experimental analysis are not possible (due to cost or size limitations) or when parametric studies with high number of variables are needed. However, the numerical models must be properly validated with experimental tests in order to deliver reliable studies. With the purpose of studying the behaviour of stainless steel plate girders in fire situation, a total of 34 experimental tests from the literature have been numerically modelled. The tested girders had different configurations: rigid and non-rigid end posts, 2 and 4 panels, and transversal and longitudinal stiffeners were considered. Comparative analyses between those experimental and numerical results have been done. Good approximations to the experimental results at normal temperatures have been achieved with differences on average lower than 5%. Afterwards, the developed numerical model has been used to perform a sensitivity analysis on the influence of the initial geometric imperfections at both normal and elevated temperatures, considering different values for its maximum amplitudes, concluding that 10% of the web thickness is an appropriate value for the maximum amplitude of the geometric imperfections when modelling experimental tests. The effect of the residual stresses has also been analysed, being obtained differences lower than 2%. Finally, comparisons between the numerical results and the Eurocode 3 design procedures have been performed considering different uniform elevated temperatures.
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Abbreviations
- a:
-
Transverse stiffeners spacing
- bf :
-
Flange width
- bls :
-
Longitudinal stiffener width
- e:
-
Transverse stiffeners spacing of the rigid end post
- E:
-
Young’s modulus
- hw :
-
Web depth
- L:
-
Girder length
- P:
-
Ultimate load
- PG:
-
Plate girder
- tw :
-
Web thickness
- tf :
-
Flange thickness
- ts :
-
Transverse stiffeners thickness
- tls :
-
Longitudinal stiffeners thickness
- σ0.2 :
-
Proof strength at 0.2%
- σm :
-
Ultimate strength
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Acknowledgments
This research work was partially funded by the Portuguese Government through the FCT (Foundation for Science and Technology) under the PhD Grant SFRH/BD/85563/2012 (POPH/FSE funding) awarded to the first author. The authors would also like to thank to Professor Sung Lee for the data and valuable information provided which was helpful to the development of this work.
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Reis, A., Lopes, N., Real, E. et al. Stainless Steel Plate Girders Subjected to Shear Buckling at Normal and Elevated Temperatures. Fire Technol 53, 815–843 (2017). https://doi.org/10.1007/s10694-016-0602-6
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DOI: https://doi.org/10.1007/s10694-016-0602-6