TP%2312_f08 - CE 3120 Fall 2008 Thought Problem 12 Footing...

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CE 3120 Fall 2008 Thought Problem 12 Footing Loads Suppose that a foundation engineer wanting to estimate the long-term settlement of a footing states that the total sustained load on the footing is the sum of the dead load of the structure (the weight of the structure itself) plus the occupancy load (e.g. the weight of the furniture, people, etc.) Since each is the sum of many small relatively small weights, the engineer suggests that the dead load, X, and the occupancy load, Y, can be reasonably modeled as normal random variables. Unable to see any important correlation between them, the engineer also suggests that X and Y be treated as independent random variables. Data from numerous buildings of similar type suggest that μ X = 100 kips, σ X = 10 kips μ Y = 40 kips, σ Y = 10 kips a. What is the distribution of the total sustained load? b. A reasonable design load might be that load for which the probability of excedance is 5% or less. Determine such a design load.
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CE 3102 Fall 2008
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TP%2312_f08 - CE 3120 Fall 2008 Thought Problem 12 Footing...

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