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K-Truss Bridge

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by

Emily Lopez

on 16 March 2015

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Transcript of K-Truss Bridge

Thinking Map
Chosen Bridge
K-Truss:
We chose this bridge because not only is it economical, but we also feel as if the K-truss should also be popularized here in the States.
Bridge Appearance
Summary of Abby
The Warren Truss was established around the 19th century by James Warren himself. The Warren is the most simple, yet strong form of bridge. The Warren was an innovated design of the Neville truss; unlike the Neville, Warren used equilateral triangles to make to bridge more stable and able to withstand force. Most bridges have their advantages and disadvantages; Warren’s advantages and disadvantages are as follows; its advantages are: the design has an interior railing which is connected to the diagonal span which prevents people from falling down from the edge of a bridge, the truss utilizes Newton's laws of motion especially statics that forms an important part of the laws, the straight components meet at pin joints and the components of the truss will be involved in tension or compression, the main reason that it became very popular in the 19th century was because it is very easy to maintain with very few defects, and it was also simple to repair and does not cost muck of labor or man hours. However on the other hand, its disadvantages include: if not designed in the correct manner it can cause a lot of wastage in terms of material because there can be members in the design that do not contribute in any way to the overall structure, some designs that were used were found to be not suitable for the purpose for which it was built, and lastly, the bowstring truss design was not durable enough and was used to make the Pratt design which found a place amongst engineering projects. I personally think that this bridge design is suitable for only cars, SUV’s and such, but not ideal for big rigs.
Summary of Armando
Summary of Symone
Bowstring:

The bowstring design consists of a horizontal beam supporting an arc. This bridge is less expensive to build and easy to repair or construct. It is very sturdy, more than the Warren; the bridge still goes under a lot of staring and compression.

Summary of Emily
K-truss:

This arc shaped bridge consists of triangles facing each other to sustain itself. The bridge is like a complex bow-string truss bridge. It has the same arc formation but has the addition of triangles in its design. Some of the bridges advantages are that it is more economical, it can go under more pressure, and it is more appealing to the eye. It also has disadvantages like these bridges cannot carry lots of load, but the addition of the triangles help load weight that is already across the bridge.

Summary of Julian
GOAL!

K-Truss Bridge
Presented by:
Abegail Alijaga
Symone Jackson
Emily Lopez
Armando Mena
Julian Breen
Logan Tonelada


Warren with Verticals Bridge Truss:

I like the warren design in general because it is a very simple design. The warren with verticals design seems that the bridge can hold more force than just the warren truss. It also has a very effective design, meaning that it does a good job of spreading the forces that are acted upon the bridge. I believe that it would be easy to construct a bridge with this design.
4.bp.blogspot.com/_1tyegNjKP5M/TH2aXHC4yGI/AAAAAAAAABI/deygvegrilA/s320/4309666a.jpg
bridgemapper.com/photos/wv/kanawha/WVKA_I-64KanawhaRiverFortHillBr.jpg
40.media.tumblr.com/tumblr_l0mxxgirH11qbqaifo1_500.jpg


farm8.staticflickr.com/7186/6906380893_76d44e04ee_m.jpg
The Camelback Truss was established in the mid-19th century and early 20th century. Charles H. Parker modified the Pratt truss to create a "camelback" truss having a top chord which does not stay parallel with the bottom chord. This provides some saving of material with the greatest depth of truss where it is most required, at the center of the span. As with other polygonal top chords, this design made possible longer spans and more economical use of metal, and the simple design would work best as a realistic situation and our customized touch would increase the aesthetics a little. However on the other hand, the Camelback also has its disadvantages: best for short distances, not attractive, and hard to maintain.
bristol.ac.uk/civilengineering/bridges/Images/Trusses/England/London/JettyTrusses/LondonEye/DSC00063.jpg
Summary of Logan
The Pratt Truss was patented by an engineer named Thomas Pratt in 1814. The Pratt truss was designed with a simple web of diagonals in tension, vertical and compression. The Pratt offered ease of strategy and construction in means of economics. Its advantages included: efficiency because of the longer diagonal members are in tension and the shorter vertical members are in compression; however, it also had its disadvantages: members in tension fail because the member is stressed to materials maximum stress capacity.

uncledavesbrass.com/CHN-10101-BRIDGE-TRUSS-PRATT-162ft-BLK-F18.jpg

http://www.ncdot.gov/projects/ncbridges/historic/types/?p=17
http://www.garrettsbridges.com/design/trussdesign/
http://ojhsbridges.weebly.com/truss-bridges.html
http://www.answers.com/Q/Advantages_to_a_pratt_truss_bridge
http://seekyt.com/warren-truss-bridge-advantages-and-disadvantages/
http://pghbridges.com/basics.htm
http://www.okladot.state.ok.us/hqdiv/p-r-div/spansoftime/camelbackpony.htm
Citations:
Full transcript