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Tool · Circular column

Circular column P–M: exact computation, compared point by point with the original.

The compression zone of a circular section is computed exactly; results are compared point by point with the actual output of the original executable, and they agree.

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Tool screen

Circular column P–M analysis screen
Fig. 1Analysis screen for a circular column with D = 70 cm, 10-#8, fc′ 280 kgf/cm², and spiral confinement.

Results

The figure below is the actual output of the calculation core for the same section: nominal strength Pn–Mn and design strength φPn–φMn.

P–M interaction diagram of a circular column020406080100-400-200020040060080010001200M (tf·m)P (tf)Nominal strength Pn–MnDesign strength φPn–φMn
Fig. 2P–M interaction diagram of a spiral circular column with D = 70 cm, 10-#8, fc′ 280 kgf/cm², and fy 5,600 kgf/cm² (computed by the calculation core).

Circular columns: curve and calculation report in a minute.

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