bottom of the beam
In a beam bridge, two primary forces are active: compression and tension. Compression occurs at the top of the beam as it pushes down under the load, while tension occurs at the bottom of the beam as it pulls apart. These forces work together to maintain the structural integrity of the bridge, allowing it to support weight effectively across its span.
The different between suspension bridge and beam bridge are beam bridge are for short distance but suspension bridge for long distance. Beam bridge are used for highway passes and suspension bridge for wide waterway passes.
When a load pushes down on a beam bridge, it creates vertical forces that cause the beam to bend or deflect. The weight generates stress within the material, primarily resulting in tension on the bottom side and compression on the top side of the beam. This bending moment must be countered by the bridge's support structure to maintain stability and prevent failure. Additionally, the distribution of the load influences how forces are transmitted through the bridge to its supports.
Danyang-Kunshan Grand Bridge is the longest beam bridge in the world and is approx 164.8 kilometres long.
beam and tunnel
An example of a beam bridge is Chesapeake Bay bridge-tunnel Site: http://www.pbs.org/wgbh/buildingbig/bridge/index.html
beam bridge
Well with a beam it allows the bridge to support the bridge
beam
The first beam bridge was built in America
A beam or "girder" bridge is the simplest and most inexpensive kind of bridge. According to Craig Finley of Finley/McNary Engineering, "they're basically the vanillas of the bridge world." In its most basic form, a beam bridge consists of a horizontal beam that is supported at each end by piers. The weight of the beam pushes straight down on the piers. The beam itself must be strong so that it doesn't bend under its own weight and the added weight of crossing traffic. When a load pushes down on the beam, the beam's top edge is pushed together (compression) while the bottom edge is stretched (tension). The farther apart its supports, the weaker a beam bridge gets. As a result, beam bridges rarely span more than 250 feet. This doesn't mean beam bridges aren't used to cross great distances-it only means that they must be daisy-chained together, creating what's known in the bridge world as a "continuous span."
The Banpo Bridge is a girder bridge.