Axial Capacity Insufficient in Column

The axial closing is insufficient message is given for columns, walls and curtain groups, namely floor and element.

S1 Basement Floor Axial Capacity Insufficient

TBDY 2018 7.3.1.2 - The gross cross-sectional area of ​​the column, Ndm Considering the live load reduction coefficients defined in TS 498 for live loads, the joint effect of vertical loads G and Q and E earthquake effect is the calculation of axial pressure forces calculated under G + Q + E. the largest, it will meet the condition Ac ≥ Ndm /(0.40 fck).

Ac ≥ Ndm / (0.40 fck)

If the condition is not met, the column area (Ac) or concrete class should be increased.

In addition, the conditions given in TS 500 for increased vertical loads (1.4G + 1.6Q) are checked.

TS 500 7.4.1 - Axial Pressure and Bending

Nd ≤ 0.9 fcd Ac condition must be met.

Solution:

  • The cross-sectional area of ​​the element given its name and solid should be increased by increasing the dimensions.

  • Increasing the concrete class contributes to the fulfillment of the condition.


Icons:

Ac = Gross cross-sectional area of ​​the column

Ndm = N dm Considering the live load reduction coefficients defined for live loads in TS 498, the joint effect of vertical loads G and Q and E earthquake effect is the largest of the axial pressure forces calculated under G + Q + E

fck = characteristic cylinder compressive strength of concrete

Nd = Maximum column axial force under increased vertical loads

fcd = Design compressive strength of concrete


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