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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Chapter 7, Problem 7.21QPP
Repeat Problem 7.20 using LRFD assuming the factored ultimate vertical column load is 560 k.
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The authors of a paper presented a correlation analysis to investigate the relationship between maximal lactate level x and muscular endurance y. The accompanying data was read from a plot in the paper.
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6.20
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4.85
7.90
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=
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= 39.0467, S
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7,588.061. A scatter plot shows a linear pattern.
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(a) Test to see whether there is a positive correlation between maximal lactate level and muscular endurance in the population from which this data was selected. (Use α = 0.05.)
State the appropriate null and alternative hypotheses.
O Ho: P = 0
H₂: p 0
Compute the value of the sample correlation coefficient, r. (Round your answer to four decimal places.)
Calculate the test statistic and determine the P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.)
t
P-value =
State the conclusion in the problem…
Procedure:
1- Define your Cartesian system.
2- Identify the structure's supports and the type
of structure (2D) or 3D
3- If the structure has more than one element
dismember the structure and draw free body
diagram (show all actions and reactions) on
each element independently.
Tip: Pulley is a member
Rope is not an element because it is flexible,
but it shows the force (substitute it with a force)
If the Structure has one element draw free body
diagram for the element.
Tips to show forces on the free body diagram:
3.1- Determine the type of the supports
3.2- Show the unknown support reactions with
any assumed direction, BUT you cannot change
the assumed force direction once you decide.
3.3- In a common joint, you can decide on the
force direction in one element, however, in the
other one you need to follow the Newton's 3rd
law and show the opposite direction.
3.4- If you have multiple action forces in the
system, find force components for each force
independently.
Use Sin/Cos/Tan…
Procedure:
1- Define your Cartesian system.
2- Identify the structure's supports and the type
of structure (2D) or 3D
3- If the structure has more than one element
dismember the structure and draw free body
diagram (show all actions and reactions) on
each element independently.
Tip: Pulley is a member
Rope is not an element because it is flexible,
but it shows the force (substitute it with a force)
If the Structure has one element draw free body
diagram for the element.
Tips to show forces on the free body diagram:
3.1- Determine the type of the supports
3.2- Show the unknown support reactions with
any assumed direction, BUT you cannot change
the assumed force direction once you decide.
3.3- In a common joint, you can decide on the
force direction in one element, however, in the
other one you need to follow the Newton's 3rd
law and show the opposite direction.
3.4- If you have multiple action forces in the
system, find force components for each force
independently.
Use Sin/Cos/Tan…
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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