DSS

1. Subject Code
R11CED1124 R11
VNR VIGNANA JYOTHI INSTITUTE OF ENGINEERING AND TECHNOLOGY
(AUTONOMOUS)
B.Tech. III Year II Semester Regular Examinations, May, 2014
DESIGN OF STEEL STRUCTURES
(CE)
Time: 3Hours Max. Marks: 70M
Note:
1. This question paper consists of two parts. Viz .part-A & part-B
2. Answer any ONE question from part-A, and any three questions from part-B
3. Use of IS: 800-2007 code and Steel Tables is permitted.
4. Assume any data suitably if necessary.
PART-A 1 x 28=28M
1. A beam of clear span 15 m has a bearing of 300mm at each end. It has to carry a superimposed load of
100kN/m. Design the section as a plated beam assuming that only 12mm mild steel plates are available.
The top flange of the plated beam may be assumed to be laterally restrained at 3m c/c. Also calculate
the theoretical and actual points of cut off for the plates used. Apply all other checks usually. Assume
any other data suitably
2. Design a welded plate girder of span 30m. It is subjected to a uniformly distributed load of 32kN/m.
Design also the stiffeners and their connection. Use Fe 410 grade steel.
PART-B
Answer any THREE questions 3x14 = 42M
3. A column made of ISMB 500 is carrying only axial force of 400 kN and bending moment of 250kNm at
the base. Design the slabbase provided M25 grade of concrete below the base. Provide welded
connection between column and base plate.
4. A diagonal member of a roof carries an axial tension of 600 kN. Design the section and its connection
with gusset plate. Use fy=250 MPa and fu= 410 MPa. Design the welded connection. Assume connections
are made in the workshop.
5. Calculate the compressive resistance of a compound column consisting of ISHB 300 @ 58.8 kg/m with
one cover plate of 350 x 20mm on each flange and having a length of 5m. Assume that the bottom of
the column is fixed and top is pinned and fy = 250 MPa.
6. A tie member consists of an ISA 75mm x 50mm x 8 mm (FE 410 grade steel) is welded to a 10 mm
thick gusset plate at site. Design welds to transit load equal to the strength of the member if the weld is
done only two sides of the angle. Also find the lap length required for the angle if the weld is done on
three sides of angle section.
7. a) Explain the concept of plastic analysis for flexure members and also explain it with the help of
moment curvature relationship.
b) Explain briefly the terms: i) Limit state of strength ii) Limit state of serviceability 7M+7M
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