Concrete Column Interaction Diagram Rectangular. Non slender tied non spiral column reinforced with four 8 bars bending around its x axis. Column interaction diagrams were calculated without the strength reduction.
Determine seven control points on the interaction diagram and compare the calculated values in the reference and with exact values from the complete interaction diagram generated by spcolumn engineering software program from structurepoint. The example follows the provisions of aci 318 05 building code requirements for structural concrete. Every point on the interaction diagram has a unique ratio of e p m n n φ φ.
Aci 4411r 18 report on equivalent rectangular concrete stress block and transverse reinforcement for high strength concrete columns.
This procedure is followed with multiple locations of the neutral axis until the interaction diagram is constructed as shown below. Column interaction diagrams were calculated without the strength reduction. Kramer calculate p n m n by applying forces to free body diagram 7995 kips 8943 kips 48960 kips moment arms will be in inches must convert to feet for desired units. The stress and strain distribution of a rectangular column section for the calculation of pu and mu is given in figure 5 10 11.