The figure below shows a surface foundation subjected to a vertical load Q 200 kN and a moment M50 kN-m. Please answer the following questions:(1) Soil samples from this site are mainly cohesionless sand (e'= 0). A consolidated undrained triaxialtest was conducted on one of the samples at a confining pressure o, = 100 kN/m. Failure occurredwhen the major principal stress a = 200 kN/m with a pore water pressure u = 50 kN/m².Deternine the effective stress angle of friction, ' of the soil accordingly. (10%)(2) Calculate the equivalent load eccentrieity (5%), and cheek if it causes a separation between thefoundation and the soil (5%).(3) Use general bearing capacity equation and gffective area method proposed by Meyerhof to estimatethe ultimate bearing capacity of the foundation (15%), and check if it meets the required factor ofsafety for short-term loading (5%).%3D10-1900EN LonkuIM-4004N-m SokUmImB-2m.L-2m7 17 KN mB-

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The figure below shows a surface foundation subjected to a vertical load Q- 200 kN and a moment M 50 kN-m. Please answer the following questions: (1) Soil samples from this site are mainly cohesionless sand (e' = 0).A consolidated undrained triaxial test was conducted on one of the samples at a confining pressure o, = 100 kN/m². Failure occurred when the major principal stress đg = 200 kN/m² with a pore water pressure u = 50 kN/m. Determine the gffective stress angle of friction, ' of the soil accordingly. (10%) Calaule

The figure below shows a surface foundation subjected to a vertical load Q- 200 kN and a moment M 50 kN-m. Please answer the following questions: (1) Soil samples from this site are mainly cohesionless sand (e' = 0).A consolidated undrained triaxial test was conducted on one of the samples at a confining pressure o, = 100 kN/m². Failure occurred when the major principal stress đg = 200 kN/m² with a pore water pressure u = 50 kN/m. Determine the gffective stress angle of friction, ' of the soil accordingly. (10%) Calaule

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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A) The results of two consolidated-drained triaxial tests on clay are given below in Table 2. Table 2: Results of CDT tests. Specimen Chamber Pressure I II 3, kPa 110 220 Deviator Stress 01-03, kPa 220 400 a) Calculate the shear strength parameters of the soil. b) What are the normal and shear stresses on a plane inclined at 38° to the major principal plane for Specimen I? c) What are the normal and shear stresses on the failure plane at failure for Specimen II? B) The laboratory test results of a standard Proctor test are given in the following table.
A clay specimen with drained shear strength parameters of c'=5 kPa and Φ=320 is consolidated under all around pressure of 140 kPa.The specimen was then loaded axially to failure under undrained condition and failed when the principal stress diffrences reached 60 kPa.Calculate the pore pressure(u) and the pore pressure coefficient D(=A*B=Δu/Δσv) of the clay.
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A consolidated undrained triaxial test was performed on a normally consolidated clay with a critical state friction angle of 230. After an initial isotropic consolidation at a cell pressure of 50 kPa, drainage was turned off, the cell pressure was increased to 85 kPa, and the sample was loaded to ultimate conditions. A pore pressure of 55 kPa was measured at ultimate state. What value of major principal total stress was measured at the ultimate state?
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Q: A consolidated-drained tri-axial test was conducted on a normally consolidated clay. The results are as following: confining stress, G3 = 150 kN/m² and deviator stress, (Aod)t = 150 kN/m². i) Determine angle of friction, q; ii) Determine angle 0 that the failure plane makes with the major principal plane; iii) Find the normal stress and the shear stress ty on the failure plane; and iv) Determine the effective normal stress on the plane of maximum shear stress. Express your results in two decimal places.
A sand sample is subjected to direct shear testing. Two tests areperformed. For test 1, The sample shears at a stress of 2500 psf whenthe normal stress is 4000 psf.Test 2, The sample shears at a stress of 3500 psf when the normalstress is 6000 psf. Determine the following:a) Angle of Internal frictionb) Value of cohesionc) Compute the shear stress at a depth of 12 ft. if the unit weight ofthe soil is 150 pcf
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