Deflection of Structures - Examples

Geometric Methods

Example 1: Double Integration Method (Cantilever)

A cantilever beam of length LL is fixed at the left end (x=0x=0) and subjected to a point load PP at the free end (x=Lx=L). The flexural rigidity EIEI is constant. Find the equation of the elastic curve, the maximum deflection, and the maximum slope.

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Example 2: Moment-Area Method (Simply Supported Beam)

A simply supported beam of length LL carries a concentrated load PP at midspan. Constant EIEI. Find the maximum deflection at midspan using the Moment-Area Method.

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Example 3: Conjugate Beam Method

A simply supported beam (L=8 mL=8 \text{ m}) has an internal hinge at x=2 mx=2 \text{ m} from the left support. It carries a uniform load. How is the conjugate beam constructed?

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Energy Methods

Example 4: Principle of Virtual Work (Truss Deflection)

A pin-jointed truss is subjected to external loads, resulting in internal real forces NN in each member. We want to find the vertical deflection of joint CC.

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Example 5: Castigliano's Second Theorem (Beam Deflection)

A cantilever beam of length LL carries a uniform load ww. Use Castigliano's theorem to find the deflection at the free end.

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