ANALYSIS OF COMPOSITE STEEL - REINFORCED CONCRETE (SRC) COLUMNS

A composite SRC column is defined as a composite member with components of concrete and structural steel. Composite SRC columns are a very important application and widespread use of them is found, particularly in high-rise buildings. The paper presents some results of theoretical and experimental analyses of steel-reinforced concrete composite columns. There is a wide variety of types of columns with various types of cross-sections. We are concerned with composite SRC columns, which are completely or partially concrete-encased steel columns. The main topic is a theoretical analysis of the design method according to EN 1994-1-1 and experimental investigations. A partially encased steel-reinforced concrete cross-section was selected for short-term laboratory tests of composite steel-reinforced concrete columns. A total of 12 columns were tested in two series. In the first series 6 columns with a length of 3 m and with eccentricities of normal compression forces of 30 and 80 mm were tested. The second series contained 6 columns with lengths of 4 m and with eccentricities of 40 and 60 mm. The evaluation of the test results is also shown in comparison with the design method according to EN 1994-1-1.