Dr.Mahalingam College of Engineering & Technology Pollachi - 642 003

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Dr.Mahalingam College of Engineering & Technology

Pollachi
-

642 003

CONTINUOUS ASSESSMENT TEST I

Class & Branch:

I
II

B.E
-

CIVIL

Max Marks: 50

Sub.Code & Name:

STRUCTURAL ANALYSIS
-
I

Time:
1.5 Hrs

Semester:

V

Date :
2
7
.07.2010

Part
-
A (10


2
〠0慲歳a

A
湳睥爠慬氠煵敳瑩潮猺


1)

What is an internal redundancy and how do you find out
that
for the plane truss?

2)…
List the differences determinate structures
and indeterminate structures.


3)…
Distinguish between pin jointed and rigidly jointed structure?

4)…
Wha
t is
geometric non
-
linearity? Relate principle of superposition with this situation.

5)…
A
statically internal redundant
pin
-
jointed frame has
5

joints. How many members should
be there to make degree of indeterminacy
3
.

6)…
Distinguish between plane truss a
nd plane frame.

7)…
Name methods for determining displacements in pin
-
jointed truss.

8)…
What
would be
the effect of temperature on the internal member forces and external
reactions of a statically determinate plane truss?

Why?

9
)…

Define virtual work

10)…
Ex
plain williot diagram.

Part
-
B (
3*10=30 Marks
)

Answer
any Three









11).

Using the method of virtual work, find the vertical deflection component of point E of
the truss show in Fig. 1. Cross sectional areas of members are : AE and FD=250 mm
2
,
EF and EC=187
5 mm
2
, AB, BC, CD, EB and FC=1250 mm
2
, E=200 kN/mm
2
.

(10)












(P.T.O)


4.8 m

A

B

C

D

F

E

135 kN

Fig. 1

3.6 m

3.6 m

3.6 m


12).


Using the method of virtual work, find the horizontal deflection of the free end of the
post shown in Fig. 2. E=200kN/mm
2
, I = 40x10
6

mm
4
.


(10)












13).


Determine the horizontal displacement at support D of the frame shown in fig.
4. Relative I values are indicated along the members. E=200x10
6

kN/m
2

and I =
300x10
-
6

m
4
. Use the principle of virtual work.


(10)













14).

A simply supported beam has a span of 15m and is subjected to a 5 m long uniformly
distributed load of 40kN/m, traversing along the span from left to right. Draw influence
line diagram for shear force and bending moment at a section 6m from left en
d. Use the
influence diagrams to calculate the maximum shear force and maximum bending moment
at this section.


(10)


15).

A train of wheel loads as shown crosses a girder of
36
m span.


Wheel load (kN) :
1
0 10
20

20

16


Spacing (m)

:
3 4.5

4


3.5

Determine
1)
the maximum B.M at a section
9
m from the
right

end and
2)
the absolute
maximum B.M on the girder.


(10)


---------

End
-------


4 m

3 kN

6 m

2I

I

Fig. 2

2m

2m


6 m

2I

I

I

A

B

C

D

50kN