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SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act,1956)


Course & Branch :M.E
-

W
-
STRU





Max. Marks:80

Title of the Paper :Advanced Design of Steel Structures

Sub. Code :SCIX5006 (2010
-
2011)




Time : 3 Hours

Date :28/05/2012








Session :FN

______________________________________________________________________________________________________________________



PART
-

A


(6 x 5 = 30)



Answer ALL the Questions

1.

Write the advantages & disadvantages of HSFG bolted over
bearing type bolts.


2.

Describe the classification of simple beam connection with neat
sketch.


3.

Write the design procedure for gable frame.


4.

What is meant by
plate girder and explain the stiffened plate
girder with neat sketch.


5.

Explain the concept of combined stresses in cold formed steel

structures.


6.

Describe the gust factor method.


PART


B


(5 x 10 = 50)

Answer ALL the Questions

7.

Two plates 10 mm
and 18 mm thick are to be jointed by a double

cover butt joint. Assuming cover plates of 8 mm thickness,

Design the joint to transmit a factored load of 500 kN.

Assume

Fe 410 plate and grade 4.6 bolt.

(or)

8.

A tie member of a truss consisting of an an
gle section ISA 65 x
65 x 6 of Fe 410 grade, is welded to an 8 mm gusset plate as
shown in fig. 1. Design a weld to transmit a load equal to the full
strength of the member. Assume shop welding.










9.

Design a roof truss purlin

for an industrial building located at
Guwahati with a span of 20 m and a length of 50 m. the roofing is
galvanized iron sheeting. Basic wind speed is 50 m/s and the
terrain is an open industrial area. Building is class B building
with a clear height of 8
m at the eaves. Assume suitable data.

(or)

10.

Design a gantry girder to carry one electric over head travelling

crane.


Crane capacity







= 200 kN


Weight of crane excluding trolley



= 180 kN


Weight of trolley






= 35 kN


Minimum approach of crane

hook



= 1.2 m


Distance between centers of crane wheel

= 3 m


Distance between centers of gantry girder

= 15 m


Span of gantry girder





= 7.5 m


Weight of rail section





= 0.3kN/m


Height of rail section





= 75 mm


11.

Two channel sections without bent lips 200 mm X 80 mm are

connected with webs to act as a beam as shown in fig. 2. The

thickness of channel is 6 mm. the effective span of simply

supported beam is 3.5m. Determine the maximum uniformly

distributed load inclusive of self weight which can be

supported

by the beam.









(or)

12.

Te plate girder comprising two 650 X 25 mm flange plates and
one 1500 X 15 mm web plate is required to carry a factored shear
of 2800 kN. Assuming that tensio
n field action is not utilized in
the design, determine whether intermediate stiffeners are
necessary. Assume f
y

= 250 N/ mm
2
.


13.

A light gauge steel rectangular box section 200 mm X 100 mm X
2 mm is used for a column. The effective length of column is 3
.5
m. Determine the safe load carrying capacity of the section. The
steel has a yield point 235 N/mm
2
. Corner radius is 4 mm.

(or)

14.

Select a suitable angle section to carry a factored tensile force of
210 kN. Assuming a single row of M20 bolts and assum
ing
design strength as f
y

= 250 N/ mm
2
.


15.

A member in a transmission line tower is subjected to a

maximum compressive force of 210 kN and tensile force of

240 kN. Effective length of member is 2.20 m. design the

member with hot rolled angle section.

(or)

16.


(a) When longitudinal loads are produced in the transmission
line tower?


(b) List out the various conditions to be considered in the design
of transmission line tower.