259 664. The middle half of the beam shown in Fig. P-664 has a moment of inertia twice that of the rest of the beam. Find the midspan deflection. (Hint: Convert the M diagram into an M/EI diagram.) Ans. 8=(Pa³/EI) 21 tatata a R₁ R₂ Figure P-664 and P-665.

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Equilibrium and Support Reactions

Civil engineers deal with structures that are composed of several members connected or with individual members such as beams and columns. To analyze such structures, the condition of statics must be applied. Under the static condition, the members are considered to be in equilibrium under the action of forces, that is, the members are assumed to be having negligible velocity.