Assessment of Cast-Iron Columns Using Analytical Models

Abstract

The paper focuses on the assessment of cast-iron columns in industrial heritage structures. For cast-iron structures it is difficult to verify metallurgical composition and processing technology, which directly affect the geometry of cross-sections. The crucial issue of reliability of cast-iron structures is their brittle fracture in tension at higher slenderness ratios. The load carrying capacity of columns is affected by their stability and cast-iron strength in compression and tension. Outcomes of two recently proposed analytical models are compared with extensive experimental data and model uncertainty is quantified. It appears that the model is in a good agreement with experimental data and provides reasonably conservative estimates of load carrying capacity. Outcomes of the study may provide basis for foreseen improvements in calculating buckling coefficient according to ČSN 730038:2014.

Study on 19th-century cast iron columns from the former financial office building in Kwidzyn

“…A few publications deal with this issue in general (e.g. [8][9][10][11][12][13]), even less in relation to the area of Poland (e.g. [14]).…”

Optimising Surveys and Reliability Assessments of Historic Cast-Iron Columns

“…Coefficients of variation for structural members from historic metals. ] developed a more complex model that accounts for the geometrical imperfections of cast-iron columns, the tensile strength significantly lower than the compressive strength, non-linear stress-strain curve and a low Young's modulus by checking failure due to yielding in compression and fracture in tension.While the uncertainty associated with Heyde and Lindner's model has not been investigated in detail yet, Brych et al[10] and Brych and Sykora[11] compared the predictions of Rondal and Rasmussen's model with the results of 72 full-scale tests of columns made of English iron and English grey cast iron. They derived μξ = 1.2-1.25 depending on slenderness and V ξ = 0.15.…”