Bridge | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Bridge


00:00:49 1 Etymology
00:01:14 2 History
00:06:26 3 Types of bridges
00:06:47 3.1 Structure type
00:07:49 3.2 Fixed or movable bridges
00:08:30 3.3 Double-decked bridges
00:10:18 3.4 Viaducts
00:10:39 3.5 Multi-way bridge
00:11:08 3.6 Bridge types by use
00:12:34 3.7 Bridge types by material
00:13:10 4 Analysis and design
00:14:45 5 Aesthetics
00:15:59 6 Bridge maintenance
00:16:45 7 Bridge traffic loading
00:18:31 7.1 Traffic loading on long span bridges
00:19:50 8 Bridge vibration
00:20:48 8.1 Vehicle-bridge dynamic interaction
00:21:46 9 Bridge failures
00:22:25 10 Bridge monitoring
00:24:37 11 Visual index



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SUMMARY
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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 can be detrimental to cross otherwise. There are many different designs that each serve a particular purpose and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.
Most likely the earliest bridges were fallen trees and stepping stones, while Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge dating from the 13th century BC, in the Peloponnese, in southern Greece is one of the oldest arch bridges still in existence and use.