# Civil Engineering - Theory of Structures

Exercise : Theory of Structures - Section 1

- Theory of Structures - Section 1
- Theory of Structures - Section 2
- Theory of Structures - Section 3
- Theory of Structures - Section 4

36.

Two bars, one of steel and the other of copper having areas of cross-sections

*A*and_{s}*A*, coefficient of expansion α_{c}*s*and α*c*and Young's Modulii*E*and_{s}*E*are rigidly connected together at the ends and subjected to temperature change of_{s}*t*°. If the length of the bars initially is*L*, the final extension δ of the two bars at*t*° temperature is given by37.

The tangential component of stress on an plane inclined θ° to the direction of the force, may be obtained by multiplying the normal stress by

38.

The force in

*AD*of the truss shown in given figure, is39.

There are two hinged semicircular arches

*A, B*and*C*of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load*W*at their crowns. The horizontal thrust at their supports will be in the ratio of40.

A spring of mean radius 40 mm contains 8 action coils of steel (

*N*= 80000 N/mm^{2}), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, isQuick links

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