Imperfection sensitivity and insensitivity of building structures

The paper is focused on sensitivity analysis of ultimate limit states of steel-concrete building members. The load-carrying capacity of steel-concrete columns comprising steel profiles encased with high strength concrete in compression is analyzed. Assumptions for the determination of the theoretical load carrying capacity of the column are listed in the first part of the article. Stresses in the concrete and steel sections are determined according to the principles of elasticity. Numerical simulation LHS and Monte Carlo methods, which take into account the influences of variability of input imperfections, were employed. Results of the statistical analysis are compared with results of experimental research. Sensitivity analysis was used to identify those initial imperfections that significantly influence the load carrying capacity.

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