A column with 7 m high and 397 mm X 488 mm masonry is built with...

A column with 7 m high and 397 mm X 488 mm masonry is built with 25.8 Mpa CMUs in M mortar, with four vertical bars, Fy = 414 MPa, placed in grout with the same strength of the CMUs.

The column is designed to carry 1000 KN axial compression forces.

a) Find the minimum steel reinforcement and the bars diameters

As min = 0.0025 Ag, 0.0025 An < As < .04 An

b) Calculate the allowable axial load

Pa=(0.25fm'An+0.65 As Fs) 1-h140 r2

Fs=0.4 Fy ≤24,000 psi 165.6 Mpa , As M13 = 129 mm2
c) Determine the required ties and the spacing
d) Is the column designed in 6-b can carry an axial compression load of 1200 KN, Explain?

Expert Solution

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Ally Wells answered 10 months ago

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