A continuous multiple-span deck is a type of bridge design where the deck is continuous over two or more spans, while a simply supported multiple-span deck is a bridge with individual spans supported by piers or abutments at each end. There are several potential advantages of using a continuous multiple-span deck over a simply supported multiple-span deck, including:
1. Reduced bridge weight: A continuous multiple-span deck can be designed with a lighter weight because it transfers the load more efficiently over multiple spans, whereas a simply supported multiple-span deck requires stronger and heavier piers or abutments to support the weight of each individual span.
2. Increased durability: A continuous multiple-span deck distributes the load more evenly over multiple spans, reducing the stress on each individual span and increasing the bridge’s overall durability. Simply supported decks, on the other hand, can experience greater stress and wear at the points where they rest on piers or abutments.
3. Greater resistance to seismic activity: A continuous multiple-span deck can provide greater resistance to seismic activity because it can distribute the seismic forces over multiple spans, reducing the stress on each individual span.
4. Reduced maintenance costs: Because a continuous multiple-span deck can have a longer lifespan and require less maintenance due to its increased durability and resistance to stress and wear, it can potentially result in reduced maintenance costs over the life of the bridge.
Overall, while there may be some design challenges associated with continuous multiple-span decks, they offer several potential advantages over simply supported multiple-span decks, including reduced weight, increased durability, greater resistance to seismic activity, and reduced maintenance costs.
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