As part of national disaster relief effort, you had been assigned with a task to evaluate two portable bridge designs to be used in an affected area during a major flooding event. The two designs shown in FIGURE Q1 are: (i) a single-span beam bridge, and (ii) a single-span Warren truss bridge with 9 equilateral triangles. A convoy of trucks is expected to cross over the different types of bridges. The range of parameters for the length of the single span bridge, length of each truck, maximum mass of each truck and average gap between trucks are given in TABLE Q1. The bridges are simply supported at the left end, with roller support at the right end and both are designed to allow only for 1-way traffic to pass through at any given time. Based on the estimated number of trucks on the bridges, evaluate the maximum internal loads within the structural member(s) of the two bridges. State all your assumptions, select the best bridge for your area and justify your recommendation.
As part of national disaster relief effort, you had been assigned with a task to evaluate two portable bridge designs to be used in an affected area during a major flooding event. The two designs shown in FIGURE Q1 are: (i) a single-span beam bridge, and (ii) a single-span Warren truss bridge with 9 equilateral triangles. A convoy of trucks is expected to cross over the different types of bridges. The range of parameters for the length of the single span bridge, length of each truck, maximum mass of each truck and average gap between trucks are given in TABLE Q1. The bridges are simply supported at the left end, with roller support at the right end and both are designed to allow only for 1-way traffic to pass through at any given time. Based on the estimated number of trucks on the bridges, evaluate the maximum internal loads within the structural member(s) of the two bridges. State all your assumptions, select the best bridge for your area and justify your recommendation.
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