Axial Compressive Behavior of T-Shaped Concrete Columns with Steel Fiber Reinforced Concrete and High-Strength Stirrups

Irregular-shaped columns, such as T-shaped, cross-shaped, L-shaped columns, can increase the efficiency of inner space of constructions. However, many previous studies on normal concrete irregular-shaped columns demonstrate their poor ductility, even with large amount of reinforcement. To overcome these shortcomings, this paper presents a novel irregular-shaped column with enhanced performance. It consists of high-performance fiber reinforced concrete and high-strength stirrups. To confirm the behavior of this novel irregular-shaped column, four T-shaped columns were prepared and tested under axial compression. The parameters studied include the strength of high-performance concrete, and the volume content of steel fiber. The test results show that the combination of high-strength stirrups and steel fiber reinforced concrete can improve both the axial bearing capacity and ductility of the columns.