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

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Textbook Question
Chapter 7, Problem 7.20QPP

A certain column carries a vertical downward load of 424 k. It is to be supported on a 3 ft deep rectangular footing. Because of a nearby property line, this footing may be no more than 5 ft wide. The soil beneath this footing is a silty sand with the following properties: γ = 124 lb/ft 3 , c ' = 50 lb/ft 2 , and ϕ ' = 34 ° . The groundwater table is at a depth of 6 ft below the ground surface. use ASD and the spreadsheet developed in Problem 7.19 to compute the footing length required for a factor of safety of 3.0.

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A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf \$'=24° c'=90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. Using the classical piece-wise log-linear method, estimate the total settlement of this footing considering only the allowable bearing pressures using ASD approach. The unit weight of concrete is 150 pcf. State any assumptions made.
A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf \$'=24° c'= 90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. What is the maximum bending moment from the earthquake that this foundation can support? Consider bending moment only about one axis.
A certain column carries a vertical downward load of 424 k. It is to be supported on a 3 ftdeep rectangular footing. Because of a nearby property line, this footing may be no morethan 5 ft wide. The soil beneath this footing is a silty sand with the following properties:g = 124 lb/ft3 , c′ = 50 lb/ft2 , and f′ = 34°. The groundwater table is at a depth of 6 ft belowthe ground surface. Use ASD and the spreadsheet developed in Problem 7.19 to compute thefooting length required for a factor of safety of 3.0.
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