B.TECH 3RD SEM.
STRUCTURAL ANALYSIS -1
PAPER: CE -201 –F
DEC - 2010
SECTION - A
Q.NO. 1 (a).
State “Hook’s law and it’s applications”. 05
Q.NO. 1 (b). A load of 400KN is applied on a short concrete column 250mm×250mm and the column is reinforced with steel bars of total area 2512 mm2 . if the modulus of elasticity for steel is 18 time, that of concrete, . Find the stresses in concrete and steel. 15
Q.NO. 2(a)
Derive the expression for normal stress and tangential stress on a oblique section of a body subjected to direct stresses in two mutually perpendicular direction. 10
Q.NO. 2(b)
At a point in a strained material, is subjected to two mutually perpendicular tensile stresses of 20 kN/cm2 and 10 kN/cm2 . Determine the intensities of normal stress and resultant stress on a plane, inclined at 50° to horizontal axis i.e. axis of minor principal stress. 10
SECTION –B
Q.NO. 3
A I-section is as shown in fig. . It is subjected to a bending moment of 5000 N-m at its neutral axis . Find the maximum stress induced in the beam. 
20
20
Q.NO. 4(a)
Drive a torsion equation for a circular shaft. 10
Q.NO. 4(b)
A wooden beam 15cm wide and 20cm deep is reinforced at the bottom by a steel plate 15cm wide and 1.2 cm thick . if the allowable stresses in wood and steel are 1 kN/cm2 and 13 kN/cm2 respectively. Find the safe Bending Moment that the section may carry. (Take Es = 15 Ew ) 10
SECTION-C
Q.NO. 5(a)
What are the different end conditions for column
What will be the effective length according to these conditions? 2.5+2.5=5
What will be the effective length according to these conditions? 2.5+2.5=5
Q.NO. 5(b)
A strut 3.0m long is 60mm in diameter. Find the safe compressive load for the member using Euler’s formula if
(i) Both ends hinged or pinned.
(ii) Both ends fixed
Take E =2×105 N/mm2 and the factor of safety =3.5 15
Q NO. 6 (a)
State the assumptions of Euler’s column theory. 5
Q NO. 6 (b) A column of circular section made of cast iron 200mm external diameter and 20mm thick is used as a column. The length of a column is 4m. Both ends of the column are fixed. The column carries a load of 180kN at an eccentricity of 250mm from the axis of the column. Find the stresses developed in the extreme fibers. Take E =94000 N/mm2. 15
SECTION -D
Q.NO. 7
A beam 6m long simply supported at the ends and carries a uniformly distributed load of 15 k N/m and three concentrated loads 10kN, 20kN and 30kN acting at 1.5m from left support , centre point and 1.5m from right support respectively. Draw the SFD and BMD and determine the max. B.M. 20
Q.NO. 8
A simply supported beam AB, of span 10m is subjected to a point load of magnitude 50 kN at its centre Find out the maximum slope and deflection by moment area method. Take I =160×103 cm4 and E = 2×105N/mm2. 20
NAEEM KHAN
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