Structural Analysis Program Using Direct Stiffness Method for The Design of Reinforced Concrete Column

Abstract

Most of the analyzes and calculations in civil engineering have been using computer. But many commercial structural
analysis programs are relatively expensive. Hence one of the alternative way is using a self developed structural
analysis program. The computer program is constructed using Visual Basic 6 programming language. Using direct
stiffness method and theory of ACI 318-02, a numerical procedure along with a computer program was developed for
the structural analysis and design of reinforced concrete member. From the direct stiffness method,in terms of
structural analysis, the output that obtained from the program are internal element forces and support reactions node
displacements. From ACI 318-02 codes, in terms of reinforced concrete member analysis, the program generate the
amount of longitudinal and lateral reinforcement of concrete member based on the output in the previous structure
analysis program. The program also reveals the biaxial bending-axial interaction diagrams in each direction of
rectangular and circular column. The interaction diagram of the columns is a visual representation to determine the
maximum axial load and moment exceeded the capacity of the column.