Sunday, April 17, 2011

Types of Bridges

There are many types of construction of bridge. Which type is to be used for building a bridge is depending on utilization of the bridge and many  other circumstances.Bridges around the world are built using different types of construction. Some are a combination of two or more types.
Main types of bridge construction are

Truss Bridge 
Cable stayed Bridge
Arch Bridge
Suspension Bridge
Cantilever Bridge

Some of the world famous bridges.

Bosphorus Bridge       This is the only bridge in the world which joins two continents (Asia and Europe)
This was the world's longest bridge when built in 1973. Today it is the world's 16 th longest bridge.


Golden Gate Bridge
This is a suspension bridge spanning the Golden Gate, the opening of theSan Francisco Bay into the Pacific Ocean.  It connects the city of San Francisco on the northern tip of the San Francisco Peninsula to Marin County. The Golden Gate Bridge was the longest suspension bridge span in the world when it was completed in 1937.


Bandra - Worli Sea Link
is a cable-stayed bridge with pre-stressed concrete viaduct approaches, which links Bandra and the western suburbs of Mumbai with Worli and central Mumbai, and is the first phase of the proposed West Island Freeway system.


Donghai Bridge
was the longest cross-sea bridge in the world until Hangzhou Bay Bridge opened on May 1st 2008. It was completed on December 10, 2005. It has a total length of 32.5 kilometres (20.2 miles) and connects mainland Shanghai and the offshoreYangshan deep-water port in China.


Hangzhou Bay Bridge
is a long highway bridge with acable-stayed portion across Hangzhou Bay in the eastern coastal region of China. It connects the municipalities of Jiaxing and Ningbo in Zhejiangprovince. At 35.673 km (22 mi) in length, Hangzhou Bay Bridge is the longest trans-oceanic bridge in the world, but it does not have the longest cable-stayed main span. It is also second in the world in overall length.


Robindra Setu (Howrah Bridge)
Construction of the New Howrah Bridge was started on 1937. The Cantilever Era was prevailing at that time, and engineers felts that cantilever bridges were more rigid than suspension bridges. This bridge is one of the finest cantilever bridges in the world - a gift to India from the Purulian engineers. It is also known as Howrah Bridge.

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