Foundation Design: Principles and Practices (3rd Edition)
Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
Textbook Question
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Chapter 7, Problem 7.14QPP

A spread footing supported on a sandy soil has been designed using ASD to support a certain column load with a factor of safety of 2.5 against a bearing capacity failure. However, there is some uncertainty in both the column load, P, and the friction angle, ϕ . Which would have the greatest impact on the actual factor Of safety: an actual P that is twice the design value, or actual ϕ that is half the design value? use bearing capacity computations with reasonable assumed values to demonstrate the reason for your response.

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For the strip footing shown in the figure below. Calculate ney allowable bearing capacity of the foundation shown in the figure below Note: The foundation is strip footing with width of 4m. Assume a factor of safety = 3.0
A 60 kip column is supported on a square footing with a length and base of 4 ft. Using the 2:1 Method, what is the increase in vertical stress (Ao₂) at a depth of 5 ft below the footing? O 3750 psf O 740 psf 625 psf O 400 psf
2. A 10ft x 8ft foundation is set 4 feet below grade in the geotechnical setting provided in the above problem No 1, an applied load Q of 420kips is supported by this footing. Calculate the change of stress at 15ft and 30ft below grade at the center of the footing using: a. The 2:1 method b. m and n method

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Foundation Design: Principles and Practices (3rd Edition)

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