\ TED (10) -302s (REVTSTON
--
Reg. No
2010)
FOURTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY
-
OCTOBER. 20 I 6
THEORY OF STRUCTURES _ II (Common for CE,
A&
EN, QS and WR)
lTime (Maximum mark
PART
:
:3
hours
100)
A
-
(Maximum marks : 10) Marks
Answer the following questions in one or two sentences' Each question carries 2 marks.
L 2. 3. 4. 5.
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Define pure bending
Draw the shear stress distribution diagram of a symmetrical What is meant bY core of a section
?
I
section'
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beam ? When we will use Mecaulay's method for finding slope and deflection of a
Define stiffiress
factor.
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PARI-
d a
B
(5x2:
(Maximum marks : 30)
6 marks' Answer any five questions frsm the following. Each question carries
Il
drum A strip'of steel65mm wide and 36mm thick is bend around a circular of S.)0m outer diameter. Calculate the maximum sffess due to bending' Take E :2 xl0s N/mm2. A beam of rectangular cross section 160mm wide and 270mm deep is subjected intensity to a maximum shear force of 25 K.N. Find the marimum shear stress and draw the shear sness distribution diagam'
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2.
3.
4.
[134]
x A hollow rectangular column of extemal dimensions are 200mm 120mm' on an The thickness of the column is 30mm. A vertical load of 20 KN acts electricity of 30mm from the C.G of the section in a plain bisecting shorter side. Find the maximum and minimum intensities of sffess at the base' A concrete dam of trapezoidal section has a vertical face on the water side' Its height is 6m, top width 2.5m and bottom width 3.60m- Determine the Take maximum and minimum stress of its base when the reservoir is frrll' weight of water 9810N/mr and weight of masonry as 20000 N/m3.
10)
2
Marks
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6. ,7
c' f il;i;"*
at A. B and and central Point
rlft
t*ottm
rousbeam?
,,,
in spa
I<
of tluee moments'
PART
C
-
60) (Modmum marks :
(AnsweroneN|questionfromeachunit'Eachfullquestioncarries15marks.) UNrr - I
lll (a) Explain the terms' (i) Neutral axis (b)
-
^_+ of ^f (ii) Moment
200mm An I-section beam of flanges
Draw the shear distribution force of 30 KN'
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(iii) Section modules ,pcicranc€ resistance
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;t;""-
x 15mm thick' 15mm thick' web 30qT if it canies a shear across the section,
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On
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Iv(a)Deriveequationofshearstressatanypointinthecrosssectionofabeam. at its end and has (b) A wooden beam 3'20m is simply supported of 42 KN/m over 1tt:::':totot the enflre span' u.D.L. a c#es It x deep. 200mm 350mm
d a
Calculatethebendingsressatapointl00mmabovethebottomandlmfrom the left suPPort'
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UNrr
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of v (a) Distinguish between direct stress and bending sftess by means face vertical' (b) A masonry dam of 12m high and free board 2m with water base.
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a diagram'
avoid tension at the Determine the top and bottomkatn of ttre dam to of water Morimum stress at the bottom is 420 KN/m2. Take unit weight and the masoffy as 9810 N/m3 and 20000 N/m3 respectively. On
250mm x 250mm canies a concentated load 'P' on the X-X axis at a distance 50mm from Y-Y axis. Find the value of 'P' to impose a maximum sfess 5 N/mm2.
y1 (a) A square column
(b) A fixed beam ABCD of length 5m carries two point loads of 12 KN at B and C. If AB = CD: lrl, furd out the end moments and the bending moments B and C. Draw the S.F. and B.M. diagrams.
at
3
Marks
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fril""T.#ilfu ;::t[;j,r_r,u.x
-,i,j$j."fj"*,1",-'"$iffij*:#1i:;j',it";111fl I=2x
ottn'area 16rn,',,o.
vlll (a) write down the max_
method.
lake
i
jf
E=z"ygtp7frr'ff
on
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(b) A
simply supported
diameter 11 carries rimired ro
sl
,Tl5T
:t.t:"ular
cross-secdon rs 4m long and l00mm
r_ilm:;:ffi.*,"Tlfffn$u,i;|e Take E = 2 x IOs N/mm2.
x
[Jxrr
-
maximum
car
occur
a.n..,i"" i,
in
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the beam.
A continuous beam ABC is simply supported at A, B and C and having AB = 5m and BC = 3m. The span AB carries a'poinr fouj'J +*iN'u, 2m awayliom rhe support A The span BC is carrying u tlit. of z rNL. i.'ina"*," hTt:g momenb at support A, B.and C, using Clapey.on.s support reactions T! rheorem of tluee moment. Also draw rhe shear force and u.noing
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On
A continuous beam ABC is fixed, atA and simply supporled at ts and C. The lenghs are AB : BC = 3m. If the u.a.
d a
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span
c_ri.s ;iil;;;', KN/m throughout length, frnd out the reactions and bending momenrs, usmg moment
the entire distribution method. Also draw the shear lorce and Uenaing moment diagram.
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