A Effective Normal Stress, ơ' Effective normal stress at point A (psi) = ... (Report to the nearest whole number, i.e. no decimals) Effective normal stress at point (psi) = (Report to the nearest whole number, i.e. no decimals) c) If it is known that the effective cohesion, C' of the above soil is zero (i.e., C' = 0), the value of effective friction angle (O') in degrees = |(Provide the answer to nearest one decimal point) Shear Stress, t
A Effective Normal Stress, ơ' Effective normal stress at point A (psi) = ... (Report to the nearest whole number, i.e. no decimals) Effective normal stress at point (psi) = (Report to the nearest whole number, i.e. no decimals) c) If it is known that the effective cohesion, C' of the above soil is zero (i.e., C' = 0), the value of effective friction angle (O') in degrees = |(Provide the answer to nearest one decimal point) Shear Stress, t
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:**Description of Diagram:**
The diagram depicts a graph with the horizontal axis labeled as "Effective Normal Stress, σ'," and the vertical axis labeled as "Shear Stress, τ."
- The graph features a semicircular curve that starts at point A on the horizontal axis and ends at point B.
**Instructions:**
1. **Effective normal stress at point A (psi):** Fill in the blank box provided. (Report to the nearest whole number, i.e., no decimals)
2. **Effective normal stress at point B (psi):** Fill in the blank box provided. (Report to the nearest whole number, i.e., no decimals)
3. **If it is known that the effective cohesion, C' of the above soil is zero (i.e., C' = 0), the value of effective friction angle (Φ') in degrees:** Fill in the blank box provided. (Provide the answer to nearest one decimal point)
![A triaxial compression test was conducted on a saturated soil sample to determine its shear strength parameters: effective cohesion (C') and effective friction angle (Φ'). The confining pressure used during the test was 30 psi. The deviator stress on the sample at the time of failure was 40 psi. The porewater pressure measured at the time of failure was 5 psi.
a) The figure below shows the stress conditions on the sample at the time of failure. Provide the values of total stresses, σ₁ and σ₃ on the sample.
![Illustration of a cylindrical sample under stress. The sample is subjected to principal stresses, σ₁ (vertical) and σ₃ (horizontal).]
- **Total horizontal stress, σ₃ (psi) =** [_______] ... (Report to the nearest whole number, i.e., no decimals)
- **Total vertical stress, σ₁ (psi) =** [_______] ... (Report to the nearest whole number, i.e., no decimals)
b) The figure below shows the effective stress Mohr's Circle for the above soil sample at failure. What are the values of effective normal stresses at points A and B?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbf4a0e0b-2125-467b-b1bc-8bc81e995df8%2Fb82c1481-26a6-4e29-bb8e-e0f4f378d5bb%2Fyvsh8u_processed.png&w=3840&q=75)
Transcribed Image Text:A triaxial compression test was conducted on a saturated soil sample to determine its shear strength parameters: effective cohesion (C') and effective friction angle (Φ'). The confining pressure used during the test was 30 psi. The deviator stress on the sample at the time of failure was 40 psi. The porewater pressure measured at the time of failure was 5 psi.
a) The figure below shows the stress conditions on the sample at the time of failure. Provide the values of total stresses, σ₁ and σ₃ on the sample.
![Illustration of a cylindrical sample under stress. The sample is subjected to principal stresses, σ₁ (vertical) and σ₃ (horizontal).]
- **Total horizontal stress, σ₃ (psi) =** [_______] ... (Report to the nearest whole number, i.e., no decimals)
- **Total vertical stress, σ₁ (psi) =** [_______] ... (Report to the nearest whole number, i.e., no decimals)
b) The figure below shows the effective stress Mohr's Circle for the above soil sample at failure. What are the values of effective normal stresses at points A and B?
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