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Theory of Structures

Theory of Structures
The greatest load which a spring can carry without getting permanently distorted, is called

Stiffness
Proof stress
Proof load
Proof resilience

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Theory of Structures
parabolic arch of span and rise , is given by The equation of a

y = 3h/l² × (1 – x)
y = 4h/l² × (1 – x)
y = h/l² × (1 – x )
y = 2h/l² × (1 – x)

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Theory of Structures
The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called

Stiffness
Proof resilience
Proof load
Proof stress

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Theory of Structures
In case of principal axes of a section

None of these
Product of moment of inertia is zero
Difference of moment inertia is zero
Sum of moment of inertia is zero

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Theory of Structures
A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the value of E = 0.2 × 106 N/mm², the depth of the joist, is

300 mm
250 mm
200 mm
400 mm

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Theory of Structures
The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch).

150/EIc
50/EIc
200/EIc
100/EIc

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