Civil Engineering :: Theory of Structures
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The ratio of maximum and average shear stresses on a rectangular section, is
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The locus of the moment of inertia about inclined axes to the principal axis, is
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A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is
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A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is
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A simply supported beam A carries a point load at its midspan. An other identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be
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The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span ; flexural rigidity being EI, is
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The strain energy due to volumetric strain
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If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is\( \frac { 17 } { 64} \)\(\frac { fs } { N } \)
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m1 and m2 are the members of two individual simple trusses of a compound truss. The compound truss will be rigid and determinate if
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In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is