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Calculate the induced vertical stress at point A at a depth of 5 feet. The surface stress in the shaded areas is 3000 lb/ft2. Hint: The contributions of the shaded areas must be calculated separately and then added together. The contribution from the lower area will require the use of imaginary rectangles. (Answer: 1892 lb/ft², yours may differ slightly) A 3

Calculate the induced vertical stress at point A at a depth of 5 feet. The surface stress in the shaded areas is 3000 lb/ft2. Hint: The contributions of the shaded areas must be calculated separately and then added together. The contribution from the lower area will require the use of imaginary rectangles. (Answer: 1892 lb/ft², yours may differ slightly) A 3

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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**Transcription for Educational Website:** **Question 6:** Calculate the induced vertical stress at point A at a depth of 5 feet. The surface stress in the shaded areas is 3000 lb/ft². Hint: The contributions of the shaded areas must be calculated separately and then added together. The contribution from the lower area will require the use of imaginary rectangles. (Answer: 1892 lb/ft², yours may differ slightly) **Question 7:** Four 40’ diameter fuel tanks are constructed in a square pattern. The tanks apply a maximum surface pressure of 5000 lb/ft². The spacing of the tanks is 50 feet center-center. What is the induced vertical stress beneath the center of the area at depths of 20 feet and 50 feet? (1400 and 1700 lb/ft², some variation expected from chart reading) **Diagram Description:** The diagram accompanying Question 6 shows a vertical section with labeled dimensions. The highlighted section consists of two areas: - **Shaded Area A:** Positioned on the right half of the diagram, with a part of its boundary at the top marked as 6 units. - **Imaginary Rectangles:** These are used for calculating contributions from the lower section, suggested by dashed lines at strategic points. The x-axis and y-axis are labeled with dimensions indicating the positioning of these areas, with numerical values such as 16, 6, 8, 3, and vertical measurements contributing to understanding the layout for stress calculations.
Transcribed Image Text:**Transcription for Educational Website:** **Question 6:** Calculate the induced vertical stress at point A at a depth of 5 feet. The surface stress in the shaded areas is 3000 lb/ft². Hint: The contributions of the shaded areas must be calculated separately and then added together. The contribution from the lower area will require the use of imaginary rectangles. (Answer: 1892 lb/ft², yours may differ slightly) **Question 7:** Four 40’ diameter fuel tanks are constructed in a square pattern. The tanks apply a maximum surface pressure of 5000 lb/ft². The spacing of the tanks is 50 feet center-center. What is the induced vertical stress beneath the center of the area at depths of 20 feet and 50 feet? (1400 and 1700 lb/ft², some variation expected from chart reading) **Diagram Description:** The diagram accompanying Question 6 shows a vertical section with labeled dimensions. The highlighted section consists of two areas: - **Shaded Area A:** Positioned on the right half of the diagram, with a part of its boundary at the top marked as 6 units. - **Imaginary Rectangles:** These are used for calculating contributions from the lower section, suggested by dashed lines at strategic points. The x-axis and y-axis are labeled with dimensions indicating the positioning of these areas, with numerical values such as 16, 6, 8, 3, and vertical measurements contributing to understanding the layout for stress calculations.
Expert Solution
Step 1

Using stress influence chart for stresses under corner of a rectangular footing with uniform loading calculated the influence factors.

Then using the superposition of various areas the stress due to actual loaded area can be calculated. 

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