Question

Problem 3 : Interaction Diagrams -A short column is subje cted to a factored axial load of Pu-850 kips. The concrete has a compressive strength of 4 ksi and grade 60 steel is used. Use the interaction diagrams (where appropriate to answer the following): A. If the column is designed as a tied column, determine the minimum gross cross-sectional area that can be used to carry the axial load. B. If the column is an 18 in. by 18 in. square tied column and P 850 kips, determine the minimum required area (in') of steel. C. If the column is an 18 in. by 18 in. square tied column, Y0.60, Pg 0.04, and P 850 kips, determine the largest moment that can be applied without affecting the design. D. If the column is an 18 in, by 18 in. square tied column and the steel reinforcing ratio ρ 0.04 and γ = 0.60, determine the maximum moment that can be resisted when Pu-700 kips.

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Answer 1

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