Roll No. :.....................
Total No. of Questions: 08]
[Total No. of Pages: 02
M.. Tech.
PLASTIC ANALYSISAND DESIGN OF STEEL STRUCTURES
SUBJECT CODE: CE - 506
Paper ID : [E0846]
[Note: Please fill subject code and paper ID on OMR]
Time:
Instruction
Ql)
Maximum Marks : 100
03 Hours
to Candidates:
1)
Attempt any Five questions.
2)
All questions carry equal marks.
.
(a) The shape factor of rolled steel section is 1.2. Taking Factor of safety
= 1.65, compute value of load factor for wind..
. (b) Determine the shape factor for a channel section consisting of 8 mm
thick web and 12 mm thick flange. Take width of flange = 100 nun &
depth of weDexclu?ing flanges == 200 mm.
Q2)
.
A two span continuous beam ABC has span lengths AB = 6m = BC. It
carries udl of 30 kN/m throughout. A and C are simple supports. Taking
. Load Factor = 1.80,shape factor= 1.15,design suitableI-section.Assume
yield stress = 250 N/mm2. Indicate any method by whicp ecolloply of the
material may be achieved.
.
Q3)
Explain the concept of Minimum Weight Design. Explain theorems connected
with minimum weight design of steel structures. Illustrate with example
application of Linear Programming to minimum weight design problems.
Q.4)
A uniform simply supported rectangular beam of ideal-plastic material has
span L. It carries udl W which is increased steadily from Zeto: When
9
W = 8 Wy, show that. central deflection' /),.'
~ = (1.6/.J3 + 1.6log .J3 - ~) ~y where
Wyand /),.yare values ofW and /),.where yield first occurs. Sketch the form
of plastic zones.
M-1505[1859]
.
P.T.o.
Q5)
Discuss the following:
(a) Shake down theorem for ideal moment curvature relation.
(b) Kinematic theorem of Incremental Collapse.
Q6) . A portal frame is loaded as shown in Figure 1. Estimate the plastic moment
for the frame.
.
.
.
B
:.2.0 k.N \ \"0 .
'C
~
~OkN
~~
A.~= c. D = 4 rv\.
.Be
~b~
GV
D
A.
F,~~~
1.
Q7)
Enumerate the factors due to which Fully plastic moment is Influenced.
Discuss influence of shear force on Fully Plastic moment of a beam .of
reCtangularsection.
Q8)
Write short notes (any Three) :
(a). Brittle fracture.
.
(b) Hinge Formations.
(c) Instantaneous centre and its applications.
(d) Light Gange Metals - Special considerations for design.
,
0*0*
M-1505
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