AI Summary & Key Takeaways
AI InsightDuctility ratios are given byplotting the moment curvature diagrams of the column sections at various axial force levels of the N-M diagram.
📌 3 Key Takeaways
Abstract
Reinforced concrete elements subject to moment, shear and axial force due to different level of static and dynamic loadsbased on their location and material characteristics. These elements disseminate the loads based on their connections withother elements. In particular, each column in the structure exhibits "combined bending" behavior together with the resultingmoment of the eccentric axial force exerted. In the case of the axial load acting on one of the symmetry axes (x or y axis) theuniaxial bending, and the axial load acting out of the symmetry axis, biaxial bending occurs. Also, since the structures arecomposed of two directional frames and slabs, the reinforced concrete columns are subject to combined bending effects inboth directions. Therefore, the determination of the ultimate strength and behavior of the reinforced concrete columnsdepends on the interaction of axial force (N) and moment (M). In this study, the N-M diagram of reinforced concrete columnsis given considering the section geometry, concrete and steel reinforcement strength and placement of the longitudinalreinforcements. The given N-M diagrams are prepared based on the axial force limits in codes. In addition, the N-e diagramshowing the axial force and eccentricity relation of reinforced concrete column sections is given. Ductility ratios are given byplotting the moment curvature diagrams of the column sections at various axial force levels of the N-M diagram.