STRUCTURAL ANALYSIS QUIZ

If the specified thickness of a footing is 100 cm, the depth of the form work may be tolerated from

-3 mm to +3 mm

-5 mm to +5 mm

-4 mm to +4 mm

-2 mm to +2 mm

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YOUR ANSWER : ?

The Castigliano's second theorem can be used to compute deflections

For beams and frames only

For any type of structure

In statically determinate structures only

At the point under the load only

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If in a rigid-jointed space frame, (6m + r) < 6j, then the frame is

Unstable

Stable and statically indeterminate

Stable and statically determinate

None of these

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The degree of kinematic indeterminacy of a pin-jointed space frame is (where m, r and j have their usual meanings)

j-2r

j-3r

2j-r

3j-r

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For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal (i) Of a stiffness matrix must be positive (ii) Of a stiffness matrix must be negative (iii) Of a flexibility matrix must be positive (iv) Of a flexibility matrix must be negative The correct answer is

(ii) and (iv)

(ii) and (iii)

(i) and (iv)

(i) and (iii)

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In the slope deflection equations, the deformations are considered to be caused by i) bending moment ii) shear force iii) axial force The correct answer is

(i)and(ii)

(ii) and (iii)

(i), (ii) and (iii)

only (i)

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When a series of wheel loads crosses a simply supported girder, the maximum bending moment under any given wheel load occurs when

The wheel load under consideration is midway between the centre of span and the centre of gravity of the load system

The centre of span is midway between the centre of gravity of the load system and the wheel load under consideration

None of these

The centre of gravity of the load system is midway between the centre of span and wheel load under consi-deration

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The thickness of the rectangular plate for the cap or base of a solid round steel columns, is calculated from the formula t = √[(9W/16 fbct) × D/(D -d)] where ‘d’ is

The diameter of the top

The reduced diameter of the column

The dimension of the base

The diameter of the base

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The three moments equation is applicable only when

There is no settlement of supports

There is no discontinuity such as hinges within the span

The beam is prismatic

The spans are equal

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Independent displacement components at each joint of a rigid-jointed plane frame are

three linear movements

three rotations

two linear movements and one rotation

one linear movement and two rotations

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