Comparison of experimental research and nonlinear advanced FEM analysis of load capacity and deformability of slender HSC columns in bi-axial bending

The paper compares results of own experimental research of sixteen reinforced concrete columns made of HSC in bi-axial bending with advanced three-dimensional FEM analysis. Computational analysis with application of TNO DIANA v.9.4 system and pre and post processor MIDAS FX+ was conducted. The analysis was used mostly to check a compatibility of the conducted research with the advanced 3D numerical model and to prove a usefulness of applied numerical model in calculation of load-bearing capacity of bi-axially bending columns. Mechanical properties of concrete and reinforcing steel were assumed based on the results of material tests.