AY Honors/Bridges/Answer Key/es

Puentes
Asociación General Artes y Habilidades Manuales	Destreza: 1 Año de introducción: 2012

Requisitos

2. Describir las 6 clases principales de diseño de puentes y dar 2 ejemplos de cada uno:

c. Cable-stayed bridge

Sutong Bridge over the Yangtze River

File:Antirio bridge evening.JPG

Rio-Antirio Bridge in Greece (fan shaped)

Rama VIII Bridge in Thailand (harp shaped)

d. Cantilever bridge

Forth Rail Bridge

Quebec Bridge, Quebec, Canada

A bridge built using cantilevers, structures that project horizontally into space, supported on only one end. For small footbridges, the cantilevers my be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from pre-stressed concrete. The steel truss cantilever bridge was a major breakthrough when first put into practice, as it can span distances of over 1,500 feet, and can be more easily constructed at difficult crossings by virtue of using little or no falsework.

e. Suspension bridge

The first permanent wire cable suspension bridge was Guillaume Henri Dufour’s Saint Antoine Bridge in Geneva in 1823, with two 40 meter spans. The first with cables assembled in mid-air in the modern method was Joseph Chaley’s Grand Point Suspendu in Fribourg, in 1834. The Otto Beit Bridge was the first modern suspension bridge outside the United States with parallel wire cables. Currently the longest suspended-deck suspension bridge in the world is the Akashi-Kaikyo Bridge in Japan, with a main span of 1991 meters.

f. Truss bridge

A Bailey bridge, used by the military around the world

Sky Gate Bridge R in Osaka, Japan

4. Name the bridge design that can span the longest distance.

Suspension bridge

5.Draw or illustrate the basic design of each of the following bridge types.

More information at Bridge Structure Types

a.Beam bridge

b.Arch bridge

c.Suspension bridge

d.Covered bridge

A covered bridge could use any of several underlying designs like Beam, Arch, or Truss but the key feature is that the travel lane(s) are enclosed by a covered structure. The covering protects wood bridges from decay, or can have other reasons for the cover in pedestrian models likes weather protection and space for shops. Draw a bridge with a roof and walls.

e.Truss bridge

f.Cable-stayed bridge (fan shape)

all cables collected at the top of the tower. Compare to cable-stayed harp shape below

g.Cantilever bridge

h.Bascule bridge

i.Cable-stayed bridge (harp shape)

Cables hung down the towers. Compare to the cable-stayed fan shape above

7. Make a video/multimedia presentation or scrapbook presentation about bridge(s) you have seen.

This requirement does not specify the amount of information required, so use your common sensem Why not work on the scrapbooking honor too?