Concrete Span Bridge and Its Major Parts
Even though there are many different types of precast concrete bridges to examine, we will focus on the most important aspects of bridges in this piece - concrete span bridges. Every bridge engineer should be well-versed in the numerous terminologies that are used during the bridge design process. Every bridge can be separated into three segments during the design phase.
It includes the deck, slab, and girders, is the section of the structure that supports traffic. A Superstructure is defined as all sections of a bridge that are supported by a supporting system.
The portion of the structure supports the superstructure and transfers the structural load to the such as piers and abutments.foundations,
The component that distributes loads from the substructure to the bearing stratum is the foundation. Shallow foundation or deep foundations are used depending on the geotechnical qualities of the bearing strata. For bridge foundations, piling and well foundations are commonly used.
Let's look at the five primary components of an RC bridge now.
Girder / Beam
The section of the superstructure structure that bends along the span is known as a beam or girder. It is the load-bearing element that keeps the deck in place. The span is the distance between support points (eg piers, abutment). The deck is the part of the bridge that directly carries traffic loads. Depending on the decking material, the deck transfers loads to the girders.
Loads are transferred from the girders to the pier caps via bearings. A bearing is a component that supports a section of a bridge and transmits forces from that section to another part of the structure while allowing angular and/or linear movement between components.
Headstock / Pier Cap
The component that transfers loads from the superstructure to the piers is known as the pier cap or headstock. Pier caps offer enough seating for Bridge girders and distribute loads from the bearings to the Piers.
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The section of the substructure that supports the superstructure at the end of the span and transfers loads from the superstructure to the foundations is known as a pier. Various shapes of piers are adapted to fulfill the requirement based on aesthetics, site, space, and cost restrictions.
Piers are often constructed with Reinforced Concrete or Prestressed Concrete.
The piers belong to compression members. Piers may bend as well, based on the stress and bearing articulations.
Pile Cap and Piles
The most prevalent foundation system for bridges is a pile foundation. Pile is a load-bearing thin compression member-driven into or created in the earth to withstand loads. The pile cap is a reinforced concrete mass cast around the head of a group of piles to guarantee that they function collectively and disperse the load evenly.