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교량의 종류

저작시기 2009.11 |등록일 2010.04.24 파워포인트파일MS 파워포인트 (ppt) | 15페이지 | 가격 1,000원

소개글

교량의 종류를 ppt형식으로 실 교량을 예로들어 간단하게 분류하여 설명할 수 있는 발표 자료(발표 대본 있음)

목차

Beam Bridge
Arch Bridge
Suspension Bridge
Truss Bridge
Cable-Stayed Bridge

본문내용

Basic Types
Beam Bridge
Arch Bridge
Suspension Bridg
Truss Bridge
Cable-stayed Bridge
Comparison suspension bridge
& Cable-stayed bridge
The type of bridge used depends on various features of the obstacle. The main feature that controls the bridge type is the size of the obstacle. How far is it from one side to the other? This is a major factor in determining what type of bridge to use.
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Types of Bridges
Beam Bridge
Consists of a horizontal beam supported at each end by piers. The weight of the beam pushes straight down on the piers. The farther apart its piers, the weaker the beam becomes. This is why beam bridges rarely span more than about 80 meter.
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Types of Bridges




Types of Bridges
Comparison suspension bridge
& cable-stayed bridge
A multiple-tower cable-stayed bridge may appear similar to a suspension bridge, but in fact is very different in principle and in the method of construction.
In the suspension bridge, a large cable is made up by "spinning" small diameter wires between two towers, and at each end to anchorages into the ground or to a massive structure. These cables form the primary load-bearing structure for the bridge deck.
Before the deck is installed, the cables are under tension from only their own weight.
Smaller cables or rods are then suspended from the main cable, and used to support the load of the bridge deck, which is lifted in sections and attached to the suspender cables.
As this is done the tension in the cables increases, as it does with the live load of vehicles or persons crossing the bridge.
The tension on the cables must
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