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Concrete structures miscellaneous

Concrete Structures

  1. An R.C. shert column, with 300 mm × 300 mm square cross section is made of M20 grade concrete and has 1 members, 20 mm diameter longitudinal bars of Fe 415 steel. It is under the action of a concrete axial compressive load. Ignoring the reduction int he area of concrete due to steel bars, the ultimate axial load carrying capacity of the column is
    1. 1659 kN
    2. 1548 kN
    3. 1198 kN
    4. 1069 kN
Correct Option: D

Pu = 0.4 fck Ac + 0.67 fy. ASC

= 0.4 × 20 × (300 × 300) + 0.67 × 415 ×4 ×
π
×202
2

= 1069 kN



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