ABSTRACT
The current method of calculating the ultimate strength of concrete-filled tube (CFT) columns employs the column interaction formula for steel and reinforced concrete sections subjected to biaxial bending. In contrast, the analytical method illustrated in this book will eliminate the need to use the column interaction formula by using the column capacity axis not only as the reference for equilibrium of internal and external forces, but also to determine the capacities of the column section at every position of this axis.
