Find the dimensions and thickness for the reinforced concrete rectangular combined footing that placed at a depth of 1.0 m below the ground surface with the following data: Column (1) Column (C) Column (1) 30 cm x 30 cm D.L.280 KN L.L.-270 KN all nes Column (2) 30 cm x 30 cm D.L. -500 kN L.L.-400 kN <-100 kPa. 4.6 m

Find the dimensions and thickness for the reinforced concrete rectangular combined footing that placed at a depth of 1.0 m below the ground surface with the following data: Column (1) Column (C) Column (1) 30 cm x 30 cm D.L.280 KN L.L.-270 KN all nes Column (2) 30 cm x 30 cm D.L. -500 kN L.L.-400 kN <-100 kPa. 4.6 m

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 1.65m wide square footing is embedded 1.81m beneath the ground surface. The soil about the ground water table has a unit weight of 16.79 kN/m3, saturated unit weight of 19.86 kN/m3, and an unconfined compressive strength of 134 kPa (hint: half of this is the cohesion). The angle of internal friction is 18 degrees.The load acting on the column are given below. Assume a plan view where B is parallel to x-axis and L is parallel to the y-axis Vertical axial load = 256kN My = 65kNm Mx = 40kNm The groundwater table is 0.65m above the base of the footing. The factor of safety is 3.0. The Meyerhof bearing capacity factors are given below: What is the cohesion shape factor \lambda_{cs}λcs? 1.147 None of the choices 1.189 1.379 1.259 1.444 Please answer this asap. For upvote. Thank you very much
A 1.65m wide square footing is embedded 1.81m beneath the ground surface. The soil about the ground water table has a unit weight of 16.79 kN/m3, saturated unit weight of 19.86 kN/m3, and an unconfined compressive strength of 134 kPa (hint: half of this is the cohesion). The angle of internal friction is 18 degrees.The load acting on the column are given below. Assume a plan view where B is parallel to x-axis and L is parallel to the y-axis Vertical axial load = 256kN My = 65kNm Mx = 40kNm The groundwater table is 0.65m above the base of the footing. The factor of safety is 3.0. The Meyerhof bearing capacity factors are given below: What is the difference between the allowable bearing capacity and the maximum bearing pressure in kPa? 386.079 None of the choices 387.161 388.515 335.987 327.928 Please answer this asap. For upvote. Thank you very much
A 1.65m wide square footing is embedded 1.81m beneath the ground surface. The soil about the ground water table has a unit weight of 16.79 kN/m3, saturated unit weight of 19.86 kN/m3, and an unconfined compressive strength of 134 kPa (hint: half of this is the cohesion). The angle of internal friction is 18 degrees.The load acting on the column are given below. Assume a plan view where B is parallel to x-axis and L is parallel to the y-axis Vertical axial load = 256kN My = 65kNm Mx = 40kNm The groundwater table is 0.65m above the base of the footing. The factor of safety is 3.0. The Meyerhof bearing capacity factors are given below: What is the gross allowable bearing capacity (kPa)? 620.356 570.263 622.791 562.204 None of the choices 621.438 Please answer this asap. For upvote. Thank you very much
Determine the width needed for a wall footing to support loads: D = 263 KN/m and L = 176 KN/m. In addition, a moment of 53 KN m must be transferred from the column to the footing. Assume the footing is 450 mm. thick, its base is 1.5 m below the final grade, and qa = 192 KPa.
A circular footing having a diameter of 1.0 m. has its bottom at a depth of 2.8 m. from the ground surface. The water table is located at a depth of 1.3 m. below the ground. The soil has the following properties: γd = 18.43 kN/m3, γsat = 19.35 kN/m3, c = 15.24 kPa, Nc = 35.09, Nq = 22.08, Nγ = 19.07. Determine the allowable load, in kN, that the footing can carry using factor of safety of 2.5. Round off to two decimal places.
Design a trapezoidal combined footing for two columns (30cm ×30cm) carrying column loads of 1.2MN and 0.90MN, if the spacing between the two columns is 4m. Take allowable soil pressure as 200KN/m2 and the length of footing as 5m. Secondly, Design the footing as a strap footing if the spacing between the columns is adjusted to be 5m.
A 460 mm x 510 mm rectangular concrete interior column is reinforced with ten - 19-mm-diameterbars. The column rest centrally on a 2 m x 3 m x 710 mm rectangular spread footing as shown inFigure 1. The design properties used are, for column: f’c = 21 MPa, fy = 276 MPa; for footing:f’c = 35 MPa, fy = 345 MPa, ys = 20.425 kN/m3, yc = 23.5 kN/m3, 75 mm clear cover, 25-mm-diameter and allowable soil pressure of 200 kPa. find the following: 1. What is the value of the column capacity Pu in kN? 2. What is the effective depth of footing as required by one-way shear or beam shear in theshort direction in mm? 3. What is the effective depth of footing as required by one-way shear or beam shear in thelong direction in mm? 4. What is the governing effective depth of footing as required by two-way shear or punchingshear mm? 5. How many rebars are needed in the long direction of the footing as required by bendingmoment based on the given “average effective depth”. Round off your answer to…
Situation 1: A footing supports a 250 mm thick wall:Given:Allowable soil bearing pressure = 192 kPaThickness of footing = 350 mmConcrete, f′c = 27.5 MPaSteel, fy = 415 MPa1) The footing is subjected to a moment of 126 kN-m and a total vertical load of 280 kN. Find the minimum width ofthe footing to prevent uplift.2) Given:Resisting moment, Mr = 440 kN − mOverturning moment, Mo = 260 kN − mTotal vertical load = 265 kNDetermine the minimum width of the following to prevent uplift.3) Given:Footing width = 3 mResisting moment, Mr = 500 kN − mOverturning moment, Mo = 265 kN − mTotal vertical load = 335 kNDetermine the maximum soil bearing pressure?
If the soil exerts a trapezoidal distributed load on the bottom of the footing, determine the intensities w1 and w2 of this distribution needed to support the column loads 60kN, 80 kN and 50 kN. Please note there is a column moment of 10 kNm in counter clockwise direction also and this must be considered in the computation.
Design a square footing to support a 500 mm x 500 mm column to carry an axial dead load of 650 kN and an axial live load of 570 kN. Us 20 mm main reinforcing bars with Fy=345 MPa. Assume f'c=27.5 MPa, Unit weight of concrete (Yc)= 23.5 kN/m^3, Unit weight of solid (Ys)=18.2 kN/m^3, depth of footing=470 mm and Concrete cover (Cc)=75 mm. (Show diagram)
Design the two footings and the strap beam that can supports an exterior column (400 mm square) and internal column of (600 mm square) placed at a distance center to center equal to 7 m. The exterior column having its face along the property line carries a DL = 500 kN and LL = 450 kN, while the interior column carries a DL = 900 kN and LL = 700 kN. The bottom of the footing is to be 1.8m below the grade. Allowable soil bearing capacity is 210 kPa. Assume e=1.5m, f’c = 20.7 MPa, and fy = 415 MPa. Use 75 mm steel cover and 25 mm Ø main bars and for the strap beam; b=600mm and 12 mm Ø for stirrups with fyt=276MPa.
Situation 7 - A long footing 2 m wide is buried at a depth of 1 m. Water table is located 0.40 m from the ground surface. Soil above the water table has a unit weight of 19.65 kN/m3 and the saturated soil has a unit weight of 21.70 kN/m3. The soil is cohesionless and has an angle of shearing resistance of 20°. Nc = 17.69, Nq = 7.44, and Nγ = 3.64. (a.) Determine the safe gross load in kN per meter width that the footing can carry assuming a factor of safety of 1.75. Hint: Overburden pressure is the effective stress from the ground surface to the bottom of the footing. Round off to two decimal places. (b.) Determine the ultimate bearing capacity of the soil in kPa. Hint: Overburden pressure is the effective stress from the ground surface to the bottom of the footing. Round off to two decimal places. (c.) Determine the overburden pressure on the soil in kPa. Hint: Overburden pressure is the effective stress from the ground surface to the bottom of the footing. Round off to two decimal…