2CL405 Design of Structures-III B. Tech. Civil Semester VII

Institute of Technology, Nirma University 2015

Term Assignment- III BEAM-COLUMN

Group Example

I 1

II 2

III 3

IV 4

Date of Issue: September 29, 2015 Date of Submission: October 09, 2015

1 A non-sway column in a building frame with flexible joints is 3m high and is subjected

to the following load and moment:

Factored axial load = 250kN

Factored moment Mz at top of column = 12kNm

Factored moment Mz at bottom of column = 20kNm

Design a suitable beam-column assuming fy = 250MPa. Take the effective length of the

column as 0.75L along both the axes.

2 A beam-column of length 3.5m is subjected to a compression of 400kN and a major

axis moment of 4kNm. The weaker plane of the column is strengthened by bracing. If

the effective length factor is 0.8, design the beam-column, assuming Fe410 grade steel.

3 Design the non-sway intermediate column in a building frame with flexible joints of

3.5m height for the following data:-

Factored axial load = 300kN

Factored moments Mz(kNm) My(kNm)

Bottom + 15 - 12

Top + 30 + 6

Take fy = 250MPa. Take effective length factor, k = 0.75 along both the axes.

4 Design a beam-column of length of 3.0m if it carries a compressive load of 250kN, a

major axis moment of 6kNm and a minor axis moment of 3kNm. Assume that the

effective length factor is 0.9 and the column is free to buckle in any plane. Take fy =

250MPa.