A series of direct shear tests have been performed on a soil, using a circular shear box with a diameter D = 2.5 in. The data from these tests, in terms of normal force applied and maximum shear force at failure, are listed below. Calculate the normal stress and the shear stress at failure in each test, graph the results on a σ−τ max plot and determine the cohesion and friction angle of this soil. Plot to scale, show units, and make sure to use the same scale for both axes.
A series of direct shear tests have been performed on a soil, using a circular shear box with a diameter D = 2.5 in. The data from these tests, in terms of normal force applied and maximum shear force at failure, are listed below. Calculate the normal stress and the shear stress at failure in each test, graph the results on a σ−τ max plot and determine the cohesion and friction angle of this soil. Plot to scale, show units, and make sure to use the same scale for both axes.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A series of direct shear tests have been performed on a soil, using a circular shear box with
a diameter D = 2.5 in. The data from these tests, in terms of normal force applied and maximum shear
force at failure, are listed below. Calculate the normal stress and the shear stress at failure in each test,
graph the results on a σ−τ max plot and determine the cohesion and friction angle of this soil. Plot to
scale, show units, and make sure to use the same scale for both axes.
Transcribed Image Text:Results of direct shear tests
Specimen Normal force,
N (lb)
1
2
3
4
7
14
21
34
Maximum shear force
at failure, Tmax (lb)
10.71
16.42
17.48
24.74
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