Arch 2700 Structures 1 Portfolio Cameron gambrell

Design Excercise 1: Static Equilibrium

Process of study models with different points of interest using dowels and foam board

In this exercise, the task was to achieve structural equilibrium of a one pound cube used as deadweight. The only uses to keep the cube in place was by using dowels, string, and nails with a restriction of no use of glue. The cube was supported with these elements by a combination of tensile and compressive elements. The strings were used for tension and the rods were for compression. During this exercise, the concepts of load distribution, gravity forces, and lateral stability were important components in order to achieve equillibrium.

Design Excercise 2: Horizontal structure
Structural design diagram of anticipated forces loads
Form after configuration analysis

This excercise involved developing a horizontal structure that was 2 feet in length and had a span of 21 inches. Building this structure to withstand as much weight as possible was the purpose of this exercise. To start, a study diagram was derived of where the anticipated forces upon the structure would be with the proposed system. When building the structure, in order to make it more structurally sound, the top chords of the truss system was doubled. Upon completion of the structure, after connecting the two halves with lateral bracing, additional cross bracing was then added to keep the structure stable.

During the live load testing, the loading part of the exercise required a point load at the 1/3 and 2/3 points of the structure. With the total weight of the bridge at 0.162 pounds and handled up to 36.3 pounds-which is equal to eleven weights in total. Not considering additional vertical components at the points were the load was being applied would have made a difference in the testing once the bridge failed.

Design Exercise 3: Design of Trusses

In this exercise, the purpose was to design a vector active structure or truss system. Each of the four trusses span 80 feet, fitting within the criteria of 4 individual designs. One symmetrical truss, one truss with variable pitch, one asymmetrical truss, and one curved truss respectively.

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Cameron Gambrell
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