An advantage of making bridges moveable is the lower cost, due to the absence of high piers and long approaches. The principal disadvantage is that the traffic on the bridge must be halted when it is opened for passages. For seldom-used railroad bridges over busy channels, the bridge may be left open and then closed for train passages. For small bridges, bridge movement may be enabled without the need for an engine. Some bridges are operated by the users, especially those with a boat, others by a bridgeman (or bridge tender); a few remotely usi ....etc

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The resund/ resund Bridge (Danish: resundsbroen , Swedish: resundsbron , hybrid name: resundsbron) is a combined railway and motorway bridge across the resund strait between Sweden and Denmark. The bridge runs nearly 8 kilometres (5 miles) from the Swedish coast to the artificial island Peberholm in the middle of the strait. The crossing is completed by the 4 km (2.5-mile) Drogden Tunnel from Peberholm to the Danish island of Amager.

The resund Bridge is the longest combined road and rail brid ....etc

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To get full information or details of prestressed concrete bridge structures please have a look on the pages

http://seminarsprojects.net/Thread-advantages-of-prestressed-concrete-bridges

if you again feel trouble on prestressed concrete bridge structures please reply in that page and ask specific fields in prestressed concrete bridge structures ....etc

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i am hitesh mishra,sir please send seminar of pamban railway bridge with ppt,'construction details,objectives,advantages,foundation details,history,length..
please sir its very urgent for presenting seminar..

email:[email protected]
....etc

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Just I want prepare seminar presentation which is held by my collage ....etc

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Flyover vs Overbridge :

Flyovers, bridges, over bridges, underpasses, overpasses etc are some examples of engineering marvel that allow for saving of time and effort of people, vehicles, and even trains. Normally bridges are made over water bodies like rivers but over bridges are meant to provide a roadway for pedestrians and even vehicles over a railway line or even an under bridge. A flyover is a concept that allows roads to be built over roads to facilitate faster movement of people and vehicles in this age of congested traffic in metro c ....etc

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i want ppt and also abstract on the topic railway bridge damage indication through gsm .. ....etc

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To get full information or details of cascaded h bridge multi level inverter please have a look on the pages

http://seminarsprojects.net/Thread-universal-algorithm-control-for-asymmetric-cascaded-multilevel-inverter

if you again feel trouble on cascaded h bridge multi level inverter please reply in that page and ask specific fields in cascaded h bridge multi level inverter ....etc

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In electronics, the Carey Foster bridge is a bridge circuit used to measure low resistances, or to measure small differences between two large resistances. It was invented by Carey Foster as a variant on the Wheatstone bridge.You may be familiar with the post office box and the meter bridge, which also
work on the same principle as Wheatstone s bridge. In the meter bridge, two of
the resistors, R and S, say, are replaced by a one meter length of resistance wire,
with uniform cross-sectional area fixed on a meter scale. Point D is an electri ....etc

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bridge bearing and stability ppt

Abstract

The designers of bridges must assure themselves that bridge bearings can transmit the high horizontal loads of current designs. The proportion of horizontal to vertical load is increasing due to the current trend toward continuous, joint free, redundant structures. From the 10 20% level of some years ago, horizontal forces are now found at and above the corresponding vertical loads. These horizontal forces require that bearing stability be investigated. Two levels of stability criteria, for normal c ....etc

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