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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Question
Chapter 7, Problem 7.13QPP
To determine
Thefactor of safety againstsliding failure for the given footing and to show whether this factor of safety is adequate or not.
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A 5.125-ft square, 2.0-ft deep spread footing is subjected to a concentric vertical load of 62.0k and an overturning moment of 30.0 ft-k. The overturning moment acts parallel to one of the
sides of the footing, and the top of the footing is flush with the ground surface and the groundwater table is at a depth of 0.5 ft below the ground surface.
Determine whether the resultant force acts within the middle third of the footing, compute the minimum and maximum bearing pressures and show the distribution of bearing pressure in a
sketch. Determine the size of the equivalent uniformly loaded footing and compute the equivalent bearing pressure.
Solution:
1. Preliminary calculation:
1). Area of the footing: A =
2). Self weight of the footing: Wf
=
2). Middle third of the footing: B/6 =
3). Pore water pressure at the bottom of the footing due to ground water: u =
2. Check eccentricity:
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ft²;
kips/ft²;
=
3). Thus the bearing pressure…
A footing is carrying a design column load of 22 k and a moment of 5 k-ft in one direction. The
footing will be founded on sand at a depth of 2 ft. The water table is 3 ft below the ground
surface. Design the footing width for a square footing that will carry the design loads and meet
the presumptive allowable bearing pressure per the International Building Code.
A footing is carrying a design column load of 22 k and a moment of 5 k-ft in one direction.The footing will be founded on sand at a depth of 2 ft. The water table is 3 ft below the ground surface.Design the footing width for a square footing that will carry the design loads and meet the presumptive allowable bearing pressure per the International Building Code.
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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Similar questions
- Define the STRESSES UNDER UNIFORMLY LOADED CIRCULAR FOOTING ?arrow_forwardA footing is carrying a design column load of 22 k and a moment of 5 k-ft in one direction.The footing will be founded on sand at a depth of 2 ft. The water table is 3 ft below the groundsurface. Design the footing width for a square footing that will carry the design loads and meetthe presumptive allowable bearing pressure per the International Building Code.arrow_forwardA square footing supports a 350x350 mm column carrying a deadload of 500kN and Live Load of 560kN. Allowable soil pressure is 210kPa. The bottom of the footing is 1.5m below the grade, Assume average weight of concrete and soil to be 18kN/m3.f’c=20MPa, fy=350MPa. PLEASE ANSWER ALL THANK YOU!arrow_forward
- Define how to determine the allowable footing pressure as per Goel (1982) ?arrow_forwardA bearing wall carries a dead load of 5.0 k/ft and a live load of 3.0 k/ft. It is supported on a3 ft wide, 2 ft deep continuous footing. The top of this footing is flush with the ground surfaceand the groundwater table is at a depth of 35 ft below the ground surface. Compute the bearingpressure for ultimate limit state design using the ASD method.arrow_forwardThe thickness and reinforcement of a spread footing are governed by structuralconcerns. Structural design is governed by the LRFD method, which means theseanalyses are based on the factored loads.arrow_forward
- Which footing will support the highest proportion of the load (critical footing)? (LO2) 3 1. A B C B1, B2 or B3 because they support the exact same load O A1 C3 B2 2.arrow_forwarda continuous footing installed at a depth of 2 feet with a base of 5 feet wide is constructed on the cohesionless soil with a unit weight of 120 lb/ft.³ and an angle of internal friction of 35° no water table encountered find the allowable bearing capacity and the allowable wall load in pounds per foot please show all work and stepsarrow_forwardPlease help, I promise to give good feedback. Please do not just guess. Thank you!arrow_forward
- Describe the Bearing capacity factors for long footings on face of slope.arrow_forwardA column 450 mm x 450 mm square supports a dead load of 1000 kN and a live load of 780 kN. The allowable soil bearing pressure is 240 kPa. The base of the footing is 1.5 m. below the grade. Assume weight of concrete to be 24 kN/m3 and that of soil to be 18 kN/m3. The total depth of footing is 600 mm with a steel covering of 100 mm. a. What is the dimension of the square footing? b. What is the safe depth of footing if f'c=21MPA?arrow_forwardDescribe a structure for which a ring footing would be appropriate.arrow_forward
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