Concrete Interaction Diagram

Figure 4.22

M-N interaction diagram (or a non-symmetrical section

Figure 4.23

Non-rectangular M N interaction example

EXAMPLE 4.11 M-N interaction diagram for a non-rectangular section

Construct the interaction diagram for the equilateral triangular column section in figure 4.23 with /i* = 25N/mm2 and />k 500N/mm2. The bending is about an axis parallel to the side AA and causes maximum compression on the corner adjacent to the steel area A'.

Figure 4.23

Non-rectangular M N interaction example

Concrete Triangular Column

3H25 bars

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