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Theory of Structures

Theory of Structures
Shear strain energy theory for the failure of a material at elastic limit, is due to

Rankine
St. Venant
Von Mises
Guest or Trecas

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Theory of Structures
A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm², the tensile force developed at a temperature of 50°C, is

120 N/mm²
100 N/mm 2
150 N/mm²
80 N/mm²

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Theory of Structures
A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is

W²L/AE
W²L/2AE
WL/2AE
WL/AE

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Theory of Structures
For beams breadth is constant,

Depth d 1/M
Depth d M
Depth d 3
Depth d

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Theory of Structures
The forces in the members of simple trusses, may be analysed by

Graphical method
Method of joints
All of these
Method of sections

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Theory of Structures
The equivalent length is of a column of length having both the ends fixed, is

L/2
L
2 L
l

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