Construction of N-M Interaction Diagram for Reinforced Concrete Columns Strengthened with Steel Jackets Using Plastic Stress Distribution Method
No attempts have been made in developing the N-M interaction diagram for reinforced concrete columns strengthened with steel jackets using the plastic stress distribution method. Therefore, this paper presents an analytical model to construct the N-M interaction diagram for reinforced concrete columns strengthened with steel jackets using the plastic stress distribution method after assuming the behavior of strengthened column to be like composite column and including the effects of confinement on concrete compressive strength. The proposed model was compared with experimental results. The comparisons showed that the model is conservative and it reveals the ultimate strength of the strengthened column. A parametric study has been also carried out to investigate the influence of various parameters on the N-M interaction diagram of the strengthened column. These parameters were: dimensions of steel angle, yield stress of the steel angles, concrete compressive strength and the size of the reinforcement bars used in RC columns. The results made clear the effects of these parameters on the N-M interaction diagram, and encouraged the use of the model in preliminary strengthening studies.
Valach P, and Gramblicka S, "Theoretical and experimental analyses of composite steel-reinforced concrete (SRC) columns." Slovak Journal of Civil Engineering (2007): 1-9.
Garzón-Roca, Julio, Jose M. Adam, Pedro A. Calderón, and Isabel B. Valente. "Finite element modelling of steel-caged RC columns subjected to axial force and bending moment." Engineering Structures 40 (2012): 168-186.
Campione G, “Simplified analytical model for R.C. columns externally strengthened with steel cages.” Journal of Civil Engineering and Science, 2(4) Dec. (2013): 212-282.
Christou P, Michael A, Anastasiou C, and Nicolaides D, "Effect of confinement on the interaction diagrams for RC sections with CFRP Grids and wraps." Int. J. Comp. Meth. and Exp. Meas. 1(3) (2013): 265–282.
Patel H C, and Panchal D R, "Development of P-M interaction chart for concrete filled tube (CFT) composite columns." International Journal of Advanced Research in Science and Engineering 5(4) (2016): 122-130.
Al-Sherrawi M H and Salman H M, “Analytical model for construction of interaction diagram for RC columns strengthened by steel jacket.” International Journal of Science and Research, 6(10) Oct. (2017): 324-328.
CEN 1994-1-1 Eurocode 4, Design of composite steel and concrete structures. Part 1: general rules and rules for buildings, Brussels (Belgium) (2004).
Garzon R J, Adam J M, Pinilla J R, and Calderon P A, "An experimental study on steel-caged RC columns subjected to axial force and bending moment." Engineering Structures, 33 (2011): 580–590.
Ezz-Eldeen H. A. “Steel jacketing technique used in strengthening reinforced concrete rectangular columns under eccentricity for practical design applications” International Journal of Engineering Trends and Technology, 35(5) May (2016): 195-204.
- There are currently no refbacks.
Copyright (c) 2017 Mohannad Husain Al-Sherrawi
This work is licensed under a Creative Commons Attribution 4.0 International License.