Ranchi University 2010-2nd Sem B.Tech Civil Engineering III BTechRegular s, / DESIGN OF STEEL STRUCTURES - Question Paper

Ranchi University

III B. Tech II Semester Regular Examinations, Apr/May 2010

DESIGN OF STEEL STRUCTURES

(Civil Engineering) Question Paper

Time: 3 Hours Max Marks: 80

Assume missing data suitably
Answer ONE from Part A and
Any THREE from part B

PART - A (Marks- 32)

1. Design a laterally unsupported beam for an effective span of 5m to carry a
superimposed load of 25kN/m and a point load of 10kN at mid point. The
ends are restrained against lateral bending and torsion. Check the suggested
section for web buckling.

Draw to scale

a) the cross section.

b) Longitudinal
section of the girder showing the stiffeners.

OR

2. Design a gusseted base under a column carrying an axial load of 1000kN.
The column section consists of ISMB 350 with plates 250mm 12mm on
each side of the I section. The allowable pressure of the concrete pedestal is
4 N/mm2. Design required connections also.

Draw to scale.

a) Plan of the gusset base with details

b) Side views of the gusseted base.

PART - B (Marks- 48)

3. a. List out and explain various features of I.S. rolled steel sections
b. List out advantages and disadvantages of welded connections over riveted
connections
c. Explain web buckling and its significance
4. Design a laterally supported beam for an effective span of 4.5m to carry a
superimposed load of 35kN/m. Check the suggested section for web
buckling

5. Design a double-laced column for a load carrying capacity of 1500 kN the
effective length of the column is 4m. Use channel sections such that the
flexural rigidity of the section is same in both the direction.
1 of 2

6. Design a gantry girder for an industrial building to carry an electric overhead
traveling crane with the following data. Check the section for bending
stresses.
Crane capacity = 200kN Weight of crane excluding crab = 100kN
Weight of crab = 50 kN Span of crane between rails = 15 m
Wheel base = 3.0 m Minimum hook approach = 1.2 m
Span of gantry girder = 8 m Weight of rail section = 30 kg/m

7. A joint of a roof truss connects members carrying a tension of
200KN.Design a tension member in the form of a pair of angles and
connected by their short legs to the same side of the gusset plate. Check the