Features of Bridge

A bridge is a structure built to span a physical obstacle, such as a body of water, valley, or road, without closing the way underneath. It is constructed for the purpose of providing passage over the obstacle, usually something that is otherwise difficult or impossible to cross.

Definition: A bridge in a computer network is one kind of network device, used to separate a network into sections. In the OSI model, a bridge works at layer-2 namely the data link layer. The main function of this is to examine the incoming traffic and examine whether to filter it or forward it.

• Network Expansion – Increases the number of attached workstations and network segments.
• Frame Buffering – Enables to interconnect different segments which use different MAC protocols as frames are buffered.
• Transparency – Works at the MAC layer and hence are transparent to higher level protocols.

There are four basic types of bridges. These are Beam bridges, Arch bridges, Cantilever bridges and Suspension bridges.

beam bridges

beam bridge

suspension bridges

The main components of a bridge are the foundation, substructure, and the superstructure. Each of these core areas have other parts within them. Piles and pile caps are constructed as the foundation of the bridge.

Successful highway bridge design must address three areas of consideration: (1) creative and aesthetic, (2) analytical, and (3) technical and practical. Given that most bridge designs today are performed by multidisciplinary teams, addressing the first two considerations is fairly easy to achieve.

Five Types of Bridges

• Beam Bridge. A beam bridge is known for being the simplest and most cost-effective bridge to build.
• Cantilever Bridges.
• Suspension Bridges.
• Arch Bridge.
• Short-Span Bridge.
• Beam Bridge.
• Cantilever Bridges.
• Suspension Bridges.

Bridge failures can lead to injuries, loss of life, and property damage on a scale equal to plane crashes, terrorist attacks, and natural disasters. That’s why bridge designers, engineers, construction workers, managers, and inspectors take their jobs so seriously.

7 Different Types of Bridges

• Arch Bridge.
• Beam Bridge.
• Cantilever Bridge.
• Suspension Bridge.
• Cable-Stayed Bridge.
• Tied-Arch Bridge.
• Truss Bridge.

There are 7 main types of bridges : Arch Bridge, Beam Bridge, Cable-stayed Bridge, Cantilever Bridge, Suspension Bridge, Truss Bridge, Tied Arch Bridge. The way in which the vertical/horizontal stresses are managed dictates the structure of different bridges.

arch bridge

hexagon

The Rolling Bridge

Suspension bridges are strong because the force on the bridge gets spread out. The weight of the cars or trains or horses, whatever’s traveling across it, pulls on the cables, creating tension. Those cables then pull down on the towers and also pull on the anchors on either end of the bridge, to hold up the deck.

Advantages & Disadvantages of a Beam Bridge

• Beam bridges may be costly even for rather short spans, since expensive steel is required as a construction material.
• When long spans are required to be covered, beam bridges are extremely expensive due to the piers required for holding the long beams.

Structural trauma caused by earthquakes, floods and fire may not result in total collapse but can seriously damage or weaken a bridge. Other problems may be less obviously destructive and come with the element of surprise discovery. Corrosion is a major threat to bridges.

Many bridge collapses occur during construction or demolition. During construction and demolition, dozens of workers may be on or under the bridge, far more than are usually present during normal use of the structure.

Allow water or large debris to pass through bridges, creating better resistance during floods. Use clear span bridges that go over a channel without exposed supports. Make sure design standards outlined by the American Society of Civil Engineers are surpassed.

about 70 years

You have to make sure that you get a bridge that is custom-made to fill the gap left by missing teeth. Ill-fitted bridges lead to discomfort but that is just the start. With time, the false tooth can lead to irritation in your gums potentially causing boils, infection, and gum recession around the bridge.

The good news is that bridges are a long-lasting solution with the right care. An average dental bridge lasts anywhere between five and fifteen years. Some dental bridges even last over 20 or even 30 years.

100 to 150 years

The design service life of most buildings is often 30 years, although buildings often last 50 to 100 years or longer. Because of their durability, most concrete and masonry buildings are demolished due to functional obsolescence rather than deterioration.

Cement is a hygroscopic product, which means it absorbs moisture. This characteristic of cement makes it imperative that it is used before its ‘best before’ date to ensure a durable structure. The shelf life of cement is 3 months.

For large scale projects like buildings, concrete should last up to 100 years if it’s properly cared for. Concrete projects that experience more wear-and-tear like sidewalks and driveways have an expected lifespan of about half that—50 years.

Joseph Aspdin