The goal of this project was to teach you how bridges are designed and built, and show the process of how bridges are designed and made in the real world by professional engineers. You may use a successful design from west point bridge design or an existing bridge. Thus the designer is not able to ensure that that structure is built as intended. Trusses are comprised of many small beams that together can support a large amount of weight and span great distances. Edsgn100 truss bridge design final design report executive summary we were approached by a company to design a bridge that was strong, aesthetically pleasing, and economically efficient. Construction of this kind of bridge is based on smart use of compression and tension. The obstacle to be crossed may be a river, a road, railway or a valley. Furthermore, girder construction is currently used for span lengths that would have. Types of truss bridges are also identified by the terms deck, pony and through which describe the placement of the travel surface in relation to the superstructure see drawings. Truss bridges are, as their name would suggest, made of trusses.
Design of a truss bridge for low cost using structural. A bridge is a manmade structure built to avoid physical obstacles without closing the way underneath such as a body of water, valley, or road. Truss bridges free download as powerpoint presentation. A framework refers to a set of straight bars that are connected together by joints that are either pointed or pinned, at which loads are carried. Essential question how does a structural engineer design a truss bridge to carry pedestrians from building to building over a heavily traveled thoroughfare. Project description you are an inhouse structural engineer for acme engineering.
To start off the project of building and bridge we first saw. Metal truss tobias bridge jefferson county, in in metal truss new casselman river bridge grantsville, md md metal truss walnut street bridge mazeppa, mn mn metal truss pine creek bridge borough of jersey shore, pa pa metal truss washington avenue bridge waco, tx tx metal truss lone wolf bridge san angelo, tx tx metal truss goshen historic truss. Intro bridge project 1 free download as powerpoint presentation. There is a relatively small number of truss designs that satisfy this requirement. We were to come up with a prototype using wood craft sticks and white elmers glue. The deck of the cable stayed bridge is a steelconcrete composite warren truss, with cross girders at. This was done by lessening the initial impact the project has on resources. By designing and constructing the bridge, students will need to explain how their scale model of a bridge is a legitimate representation of a full sized bridge and the geometric concepts that form the trusses of their bridges such as the triangle angle sum theorem, the reflection symmetry of their truss, and the alternate interior angle identity. Analysis of truss bridge submitted by sk abdul kaium roll no. Pdf analysis and design of steel truss bridges researchgate.
Most projects require several loops of this iterative process each generating. The number of members meeting at a joint had to be small enough that the forces in each could be uniquely determined. They are used to span greater distances and to carry larger loads than can be done effectively by a single beam or column. In this project, i had to design build and test a 16 inch long truss bridge. Truss bridge, bridge with its loadbearing structures composed of a series of wooden or metal triangles, known as trusses. A truss bridge is a bridge whose loadbearing superstructure is composed of a truss, a structure of connected elements usually forming triangular units. Once constructed of wooden timbers, and later including iron tension members, most truss bridges are built of metal. This truss bridge near omaha, nebraska is part of my structures field trip.
In terms of the project itself, the goals and objectives of the project include. Cablestayed bridge suspension bridge truss bridge bridge type posters arch bridges beam bridges cablestayed bridges suspension bridges truss bridges curriculum page number the bridge basics program kithas been produced in partnership with the construction industry round table cirt. In a truss bridge, this meant a span supported at the ends, with members pinned together so they could rotate at least a little at the joints. The project discussed analysis and design of steel truss bridge, the bridge is 40m long and 12 m width and 8 m high, the spaces between the. Today trusses are often used in the roofs of buildings and stadiums, in towers, construction cranes, and many similar structures and machines. Bridge structures, the unique double bottom chord tension member design eliminates the possibility for the collection of water and debris, which will lead to the accelerated deterioration of the steel thereby reducing the useful life of the structure. Popsicle bridge page 5 of 11 developed by ieee as part of tryengineering. A simple 5 minute presentation on truss bridges and its types. In design theory, the individual members of a simple. With no portion of the structure extending above the roadway, the bridge will be invulnerable to a vehicular collision. Design project 1 was to build a truss bridge using popsicle sticks and elmers glue. Types of bridges there are six main types of bridges. Thus, if you want your school project bridge to be able to hold more weight then try to spread out the force across the top of the bridge. It incorporated triangular trusses that extended to the maximum height allowed which created stability and helped dissipate the weight throughout the members.
A under the guidance of professor jafar sadek ali professor raghib adil and m. While we designed this bridge, we made sure to keep in mind the environmental impact of this project. By making several small beams act as one, larger beam, a truss uses less material and can handle heavier loads. Trusses are popular for bridge building because they use a relatively. What are truss bridge designs and how do they really work. Final report case studies on the rehabilitation of historic. Dartmouthx the engineering of structures around us,652 views 15.
Weiwei lin, teruhiko yoda, in bridge engineering, 2017. Arch arch bridges are archshaped and have abutments at each end. Design and build a model truss bridge bridge design contest. Truss is a structure of connected elements forming triangular units, and a bridge whose loadbearing superstructure is composed of a truss is a truss bridge. Professional, the constructor, and the project manager. The deck of the cablestayed bridge is a steelconcrete composite warren truss, with cross girders at. We were given specific specifications that we needed to follow, or else or. It is rare for a concept to be turned into a working project on the first try. The required passage may be for a road, a railway, pedestrians, a canal or a pipeline. The design of a truss bridge incorporates a triangular structure called truss. Shepherds bridge project objectives research actual bridge designs design a model bridge based on research submit construction drawings for approval build a bridge with toothpicks that can be tested for structural strength allowable materials regular round or flat wooden toothpicks elmers white glue paper for the roadbed optional. The connected elements typically straight may be stressed from tension, compression, or sometimes both in response to dynamic loads. The project is presently suspended by financial reasons.
While building the bridge we were to make the strongest prototype we could, but also minimize cost and weight and also make it aesthetically pleasing. Method of joints frame 181 introduction a truss is a structure composed of several members joined at their ends so as to form a rigid body. Synopsis since inception of indian railways in 1853 the railway engineers has history of more than 250 years of construction and maintenance of railway bridges. The project discussed analysis and design of steel truss bridge, the bridge is 40m long and 12 m width and 8 m high, the spaces between the trusses in the roof are various, from the beginning we. Proceedings of the spaghetti bridge design project. A problembased introduction to engineering provides students with an opportunity to learn how engineers use math, science, and technology to design real structuresin the context of a handson model bridgebuilding project. Design a truss bridge construction bidding computer aided. Introduction to bridge bridge type truss bridge arch bridge suspension bridge cantilever bridge truss bridge truss design is to support the bridge deck the truss may have ompression or tension the joint of truss is important truss force analysis loads members in tension and compression. Draw it so that it is between 8 and 11 inches long and between 1. How trusses behave analyzing compression and tension in a truss by example duration. Upon building the bridge we were given certain constraints including weight and dimensions. The truss bridges consist of a grouping of triangles that are manufactured from straight and steel bars, according to the truss bridge. The top and bottom chord are under larger forces, even though the total load is the same. Small parts of the truss are referred to as members of a truss.
The triangular units forming the truss are slim and straight in form. Given that a triangle cannot be distorted by stress, a truss gives a stable form capable of supporting considerable external loads over a large span. Designing and building filefolder bridges bridge design. Construction company of wilmington, and the edge moor bridge company, locat ed north of wilmington, are the only two known delawarebased metal truss. In the project we are going to model, analyze, design and simulate a pratt truss bridge with the use of the knowledge acquired in the course of statics. Explain how construction quality affects the performance of a structure. Add aesthetics to your bridge structure with the thru truss from u. Engineers consider many factors in bridge design, including the maximum load it can support and how much deformation the bridge materials can withstand before breaking. The results showed an average reduction in cost for the truss bridge of approximately 3% by using the optimised geometry.
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