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What type of supports are at the locations a, b, c, d, e, and f for the bridge frame in Figure 1?

A. Pinned, roller, rocker, pinned, pinned, rocker
B. Roller, pinned, pinned, rocker, rocker, pinned
C. Pinned, roller, rocker, pinned, roller, rocker
D. Rocker, pinned, roller, pinned, rocker, pinned

Answer :

The bridge frame in figure 1 has a variety of supports including pinned, roller, and rocker, each serving specific roles in maintaining equilibrium and stability. The correct option is b. Roller, pinned, pinned, rocker, rocker, pinned

Roller support at location a allows for vertical movement but prevents horizontal movement, accommodating expansion and contraction due to temperature changes. Pinned supports at locations b and c allow rotation but restrain translation in both horizontal and vertical directions. Rocker support at location d permits rotation but restrains translation in the vertical direction. Rocker support at location e allows rotation but restrains translation horizontally. Pinned support at location f restrains translation in both horizontal and vertical directions but allows rotation.

This arrangement ensures that the bridge frame can effectively distribute loads while accommodating movements such as thermal expansion and contraction, preventing structural damage and ensuring stability and safety. The correct option is b. Roller, pinned, pinned, rocker, rocker, pinned

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