Two parallel strip footings 3m wide and 5m apart(measured from centre to centre), which transmit a compressive pressure of 200kN/m2 and 100kN/m2 respectively. Determine the increment of total vertical stress at point A and B, located 3m below the ground.

Two parallel strip footings 3m wide and 5m apart(measured from centre to centre), which transmit a compressive pressure of 200kN/m2 and 100kN/m2 respectively. Determine the increment of total vertical stress at point A and B, located 3m below the ground.

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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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

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A 1.70 m by 2.60 m footing has its base 1.70 m below the ground surface. GWT is a meter above its base. (L along x-axis) Y = 15.75 kN/m C= 15 kPa Yut = 19 kN/m =26° Using Meyerhof's formula, determine the net ultimate load that the footing could carry if e = 0.45 m and es = 0.30 m. PLEASE MAKE YOUR HANDWRITING READABLE AND CLEAR. THANK YOU SO MUCH :)
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Q.1. A rectangular footing 2.0 m by 3.0 m is built in a homogeneous bed of sand of having bulk unit weight 20 kN/m³ and saturated unit weight 21 kN/m³ with an angle of shearing resistance of ( 37 P. The depth of the base of footing is 1.8 m below the ground surface and water table is located at a deth of 1.0m below the base of the foundation. a) Justify the adequacy of the footing if the proposed design load on the foundation is 1500 kN. b) depth 1.0 m below the ground Level. Calculate the safe load can be carried by the footing if the water table is located at a Consider the factor of safety of 3. Use Terzaghi's Analysis.
A 3.19m x 5.35m footing has a 407 mm column at center with the loads P = 875 kN and My=120.4 kN-m Calculate the pressure at point 2 of the footing in kPa ANSWER IS 64.5392
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Answer the following problem and show your solution 1. A 400 mm concrete wall supports a DL= 200 kN and LL =146 kN. The allowable bearing pressure is 216 kPa at the level bottom of the footing which is H=1.2m below the grade. Weight of concrete is 24 kN/m^3 and that of soil is 16kN/m^3. Thickness of footing is 300mm with an effective depth of 225mm. use load combination of U=1.4DL+1.7LL f'c-28 MPa, fy=248MPa. Use 28 mm diameter reinforcing bars. Normal weight concrete λ=1.0 a. Determine the effective soil pressure b. Find the width of the wall footing c. Compute the spacing of 28mm diameter steel reinforcement
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