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WorksheetsDay 63-Nov 26-worksheet-Btech-Columns 1
Total questions: 15
Worksheet time: 13mins
A column whose effective length is greater than three times its least lateral dimension is called —
(a)
Maximum compressive strain in concrete in pure axial compression is —
(a)
A column hinged at both ends has effective length equal to —
(a)
Minimum eccentricity for any axially loaded column as per IS 456 is —
(a)
A column fixed at one end and free at the other has effective length —
(a)
Columns may be made of plain concrete if their unsupported length does not exceed —
2 × least lateral dimension
3 × least lateral dimension
Assertion–Reason: Assertion: In axially loaded RCC columns, the neutral axis lies inside the section. Reason: In pure axial compression, strain at all fibres is equal.
Both A and R true; R explains A
Both A and R true; R does not explain A
A true; R false
A false; R true
Fill in the blank: A compression member with effective length ≤ 3 times its least lateral dimension is called a (a) .
Fill in the blank: Slenderness ratio = Effective length ÷ (a) .
Maximum strain at highly compressed fibre = 0.0035 − (0.75 × strain at ________ fibre)
Least compressed
Most compressed
In tension
At neutral axis
Fill in the blank: Effective length is the distance between two points of (a) .
Axially loaded columns must be designed considering at least ________ moment capacity.
Minimum
Maximum
Zero
Average
A reinforced concrete column has:Unsupported length = 3.0 m,Ends = Hinged at both ends,Least lateral dimension = 300 mm.Find:
a) Effective length
b) Slenderness ratio
c) Type of column
(a)
A column has:
Size = 300 mm × 500 mm
Unsupported length = 4000 mm
Find minimum eccentricity about both axes using:
(a)
A compression member has:Unsupported length = 4.0 m,One end fixed, other end free,Least lateral dimension = 400 mm.Find:
a) Effective length
b) Slenderness ratio
c) Type of column
(a)
