What are the advantages of piers constructed monolithically with the bridge deck over usage of bearings?

There are several advantages to constructing piers monolithically with the bridge deck, rather than using bearings:

Increased durability: Monolithic construction eliminates the need for bearings, which are susceptible to wear and damage over time. By eliminating bearings, the bridge is more durable and requires less maintenance.

Reduced maintenance: Bearings require regular inspection and maintenance, which can be expensive and time-consuming. Monolithic construction reduces the need for ongoing maintenance, which can save time and money over the life of the bridge.

Improved safety: Bearings can fail, which can lead to catastrophic failures of the bridge. Monolithic construction eliminates this risk, providing a safer bridge for users.

Improved aesthetics: Monolithic construction can create a seamless look between the pier and the bridge deck, creating a more visually appealing bridge.

Increased resistance to seismic forces: Monolithic construction can provide greater resistance to seismic forces, as the pier and bridge deck act as a single unit, rather than being separated by bearings that can weaken the overall structure.

However, it’s worth noting that monolithic construction can be more expensive and complex than using bearings, particularly for longer bridges or those with significant height differences between piers. Additionally, bearings can be useful in accommodating thermal expansion and contraction of the bridge deck. As with any engineering decision, the choice between monolithic construction and using bearings will depend on a range of factors specific to the project in question.