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 7.19QPP
Develop a spread sheet to compute allowable total vertical column loads using the ASD method and factored ultimate vertical column loads using LRFD. The spreadsheet should consider only vertical loads on a square or continuous footing bearing on single uniform soil. It should allow the input of footing width, depth, water table depth, soil strength parameters, a factor of safety for ASD, and a geotechnical resistance factor for LRFD. It should compute the bearing capacity based on both Terzaghi’s and Vesic "’s methods.
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Students have asked these similar questions
An 18 in square concrete column carries a factored ultimate compressive load of 640 k. It isto be supported on a 8 ft wide 12 ft long rectangular spread footing. Select appropriate valuesfor f′c and fy, then determine the required footing thickness and design the flexural reinforcingsteel. Show the results of your design in a sketch.
1. A 4ft by 4ft spread footing is proposed where the bottom of footing is set 2ft below
grade. The column bearing on this footing will impose a load of 180kips. Assuming the
subsurface conditions shown below with groundwater 5ft below grade, Use
Schmertman's method to calculate the elastic settlement of the system 6 years after
construction is completed, provide a clear sketch and show units and state assumptions.
Oft
Sand
Ymoist = 120 pcf
Phi = 30deg
Es = 52 ksf
4ft
Loose Sand
5ft
Ymoist = 125 pcf
Yat = 145 pcf
Phi = 22deg
Es (above GW) = 30 ksf
Es (below GW) = 20 ksf
8ft
Dense Sand
Ysat = 155 pcf
Phi = 35deg
Es = 60 ksf
20ft
2. The foundation above is limited to a 1.5" settlement after 10 years, speak to whether the
design is adequate and if not how can you adjust the project to meet this criteria.
A spread footing supported on a sandy soil has been designed using ASD to support a certaincolumn load with a factor of safety of 2.5 against a bearing capacity failure. However, there issome uncertainty in both the column load, P, and the friction angle, f. Which would have thegreatest impact on the actual factor of safety: an actual P that is twice the design value, or actualf that is half the design value? Use bearing capacity computations with reasonable assumedvalues to demonstrate the reason for your response.
Chapter 7 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 7 - List the three types of bearing capacity failures...Ch. 7 - A 1.2 m square, 0.4 m deep spread footing is...Ch. 7 - A 5 ft wide, 8 ft long, 2 ft deep spread footing...Ch. 7 - A column carrying a vertical downward unfactored...Ch. 7 - A column carrying a vertical downward ultimate...Ch. 7 - A 120 ft diameter cylindrical tank with an empty...Ch. 7 - A 1.5 m wide, 2.5 m long, 0.5 m deep spread...Ch. 7 - A 5 ft wide, 8 ft long, 2 ft deep spread footing...Ch. 7 - A bearing wall carries a total unfactored load 220...Ch. 7 - After the footing in Problem 7.9 was built, the...
Ch. 7 - A bearing wall carries a factored ultimate...Ch. 7 - A 5 ft wide, 8 ft long, 3 ft deep footing supports...Ch. 7 - Prob. 7.13QPPCh. 7 - A spread footing supported on a sandy soil has...Ch. 7 - A certain column carries a vertical downward load...Ch. 7 - A building column carries a factored ultimate...Ch. 7 - A 3 ft square footing is founded at a depth of 2.5...Ch. 7 - A building column carries factored ultimate loads...Ch. 7 - Develop a spread sheet to compute allowable total...Ch. 7 - A certain column carries a vertical downward load...Ch. 7 - Repeat Problem 7.20 using LRFD assuming the...Ch. 7 - Conduct a bearing capacity analysis on the Fargo...Ch. 7 - Three columns, A, B, and C, are collinear, 500 mm...Ch. 7 - Two columns, A and B, are to be built 6 ft 0 in...Ch. 7 - In May 1970, a 70 ft tall, 20 ft diameter concrete...
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- Prepare a spreadsheet to compute settlement of square footings using the e@log@p method. Thespreadsheet should allow input of: footing width, footing depth, groundwater depth, columnservice load, footing rigidity factor and Cr/(1 + e0), Cr/(1 + e0), sm′, and g as function ofdepth. Check your spreadsheet using a hand solutionarrow_forwardA footing is loaded as shown in figure 2. Compute contact pressure and soil pressure diagram.arrow_forwardGeotechnical engineering Find the value of Q Admissible in a square footing, ifarrow_forward
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