What does a rigid frame bridge usually consist of?

What does a rigid frame bridge usually consist of?

• A. Footings, Deck slab, Walls
• B. Columns, Beams, Floor slabs
• C. Piles, Abutments, Girders
• D. Only Deck Slab

Answer: (A)

Rigid frame bridges rely on a single, continuous reinforced concrete frame where the columns and the deck are tied together to act as one stiff unit. The essential parts are the footings that transfer loads into the ground, the deck slab that forms the riding surface and is cast as part of the frame, and the walls (spandrel or wing walls) that connect the frame elements and help distribute loads while providing lateral stability. This combination reflects how the frame behaves monolithically, without separate, isolated beams carrying the deck. The option listing footings, deck slab, and walls best captures these fundamental components. The other options either focus on elements not defining the rigid-frame action (like piles and separate girders) or omit the integral deck and frame relationships.

Rigid frame bridges rely on a single, continuous reinforced concrete frame where the columns and the deck are tied together to act as one stiff unit. The essential parts are the footings that transfer loads into the ground, the deck slab that forms the riding surface and is cast as part of the frame, and the walls (spandrel or wing walls) that connect the frame elements and help distribute loads while providing lateral stability. This combination reflects how the frame behaves monolithically, without separate, isolated beams carrying the deck. The option listing footings, deck slab, and walls best captures these fundamental components. The other options either focus on elements not defining the rigid-frame action (like piles and separate girders) or omit the integral deck and frame relationships.