Beirut Arab UniversityFaculty of Engineering, Dept. of Civil Engineering

CVLE 322 - R. C. Design IAssignment No. 6

Assume any data, not given, you may need.

Assume f’c = 30 MPa ; St 24/35

No1: Calculate the ultimate axial load of a 35cm square short braced column having eight size 20mm bars.

No2: A corner circular braced column is required to resist an axial dead load of 120 tons and an axial live load of 85 tons. The outside diameter of the column is not allowed to exceed 50cm. It is required to design the column section if the percentage steel area is not allowed to exceed 3.5%.

No3: Design a symmetrically reinforced concrete column section of width b=30cm with the percentage of steel not to exceed 2% if the section is subjected to:

a) Nu = 15 tons compression, Mu = 40 t.m

b) Nu = 75 tons compression, Mu = 40 t.m

c) Nu = 150 tons compression, Mu = 40 t.m

No4: Use the column interaction diagram to design a symmetrically reinforced concrete column section of width b=30cm and depth h=60 cm. The section is subjected to an ultimate moment Mu = 45 t. m and an ultimate axial load Nu = 100 t.m.

Submission Date: 23/4/ 2013