Given the following: Column: 600 mm x 600 mm Axial Dead Load = 1680 kN Axial Live Load = 1350 kN Depth of footing = 1.8 m Allowable soil pressure = 230 kPa Unit weight of soil above footing = 16 kN/m 3 Unit weight of concrete = 24 kN/m 3 fc' = 28 MPa fy = 345 MPa Design the footing if its width is limited to 3.2 m. Use 25 mm bars and 75 mm clear concrete cover. Use load factor of 1.4 DL + 1.7 LL.

Given the following: Column: 600 mm x 600 mm Axial Dead Load = 1680 kN Axial Live Load = 1350 kN Depth of footing = 1.8 m Allowable soil pressure = 230 kPa Unit weight of soil above footing = 16 kN/m 3 Unit weight of concrete = 24 kN/m 3 fc' = 28 MPa fy = 345 MPa Design the footing if its width is limited to 3.2 m. Use 25 mm bars and 75 mm clear concrete cover. Use load factor of 1.4 DL + 1.7 LL.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter11: Load And Resistance Factor Design (lrfd)

Section: Chapter Questions

Problem 11.1P: A continuous foundation is required in a soil where c=10kN/m2, =26, and =19.0kN/m3. The depth of the...

See similar textbooks

Similar questions

A 2.5m x 2.5m square footing supports a 250mm x 400mm column. Given data: Thickness of footing = 0.70m Total factored axial load = 1,818 KN Materials: Concrete, f'c = 20.7 MPa Steel bars, fy = 280 MPa (20mm diameter both ways) Clear bar covering = 75 mm Strength reduction factors = 0.75 for shear = 0.90 for bending a. Calculate the actual nominal shear stress in the footing (MPa) at the critical section for beam shear action. b. Calculate the actual ultimate shear stress in the footing (MPa) at the critical section for beam shear action. c. Calculate the actual nominal shear stress in the footing (MPa) at the critical section for punch shear action. d. Calculate the actual nominal shear stress in the footing (MPa) at the critical section for punch shear action. e. Calculate the required number of 20mm bars
pls answer
Design a square pad footing with an overall depth of 600mm, cover to the reinforcements 50mm with 20mm diameter reinforcement bars in both directions. The footing carries a 400mm square column with a dead load of 1050KN and imposed load of 300KN. The safe bearing capacity of the soil is 170KN/m^2, fcu 30N/mm^2. Assume a unit weight of concrete to be 24KN/m^3 and footing weight 150KN
An eccentric footing shown has the following loads which acts on the center of the column: Pdl=400 kN Pll=650 kN Thickness of footing is 400mm f'c= 29 MPa; fy =420 MPa db=20mm Calculate the following: 1. The minimum and maximum soil pressure due to service loads 2. The minimum and maximum soil pressure due to factored loads
SITUATION. A square footing is to support a 400 mm x 400 mm column carrying 1400 kN live load and 1200 kN dead load. The allowable soil pressure is 250 kPa. The bottom of the footing is situated 1 m below the ground surface. Assume the average unit weight of soil and concrete is 19 kN/m3. For footing, use fc' = 21 MPa and for column, use fc' = 28 MPa. For all steel bars, fy = 414 MPa. 2. Determine the effective depth of the footing. 600 mm 650 mm 700 mm 750 mm
SITUATION. A square footing is to support a 400 mm x 400 mm column carrying 1400 kN live load and 1200 kN dead load. The allowable soil pressure is 250 kPa. The bottom of the footing is situated 1 m below the ground surface. Assume the average unit weight of soil and concrete is 19 kN/m3. For footing, use fc' = 21 MPa and for column, use fc' = 28 MPa. For all steel bars, fy = 414 MPa. 1. Determine the dimensions of the footing. A 3.1 m B 3.2 m 3.3 m D 3.4 m
SITUATION. A square footing is to support a 400 mm x 400 mm column carrying 1400 kN live load and 1200 kN dead load. The allowable soil pressure is 250 kPa. The bottom of the footing is situated 1 m below the ground surface. Assume the average unit weight of soil and concrete is 19 kN/m3. For footing, use fc = 21 MPa and for column, use fe' = 28 MPa. For all steel bars, fy = 414 MPa. 2. Determine the effective depth of the footing. 600 mm 650 mm 700 mm 750 mm
9.A rectangular footing supports a square column concentrically. Given: Footing Dimensions: 2.5m wide x 4.0m long and 0.80m depth Column Dimensions: 0.45m x 0.45m Concrete, fc’ = 28MPa Steel, fy = 415MPa Concrete cover to the centroid of steel reinforcements = 100mm Unit weight of concrete = 24kN/m3 Unit weight of soil = 17kN/m3 a. Determine the concentrated load that the footing can carry based on beam action. b. Calculate the concentrated load that the footing can carry based on two-way action. c. If the allowable soil pressure at service loads is 210kPa, what column axial load (unfactored) in kN can the footing carry if depth of earth fill is 2m above the footing?
A 300 mm x 400 mm column is to be supported by 489 m thick square footing @ its %3D center. Service DL = 492 kN, service LL = 917 kN, CC to bar centroid is 90 mm, fc' = 24.32 MPa and fy 414 MPa. Consider the weight of the footing and soil to be 16.76% of the dead load. SBC = 180 kPa 300 400 300 Determine the required number of 20 mm bars parallel to the critical side. Note: Present the width (B) in multiples of 100 mm.
A strap footing consists of two footings connected by strap beam. Allowable soil pressure is 450 kPa. Footing thickness is 600mm and the bottom of the footing is 1.5m below the ground. Assume soil weight to be 19 Kn/m3 and concrete weight to be 24 Kn/m³. Use f'c = 20.7 Mpa and fy = 414 Mpa. Use 1.2DL + 1.6LL. gog = galow - footing weight – soil weight. DL = 275 kN LL = 400 kN DL = 600 kN LL = 500 kN 4.8 m 400 x 400 column 400 x 400 column 1.2 m 1.2 m a) Calculate the footing dimensions. (Size is in multiples of 100 mm) b) Draw the Shear and Moment Diagram on the Longitudinal Direction. Show the maximum shear and moment.
A square footing 2.5m x 2.5 m supports a square column 300mm x 300mm at its center. Concrete cover to bar centroid = 100mm. Ultimate load combination is 1.2DL + 1.6L. Column loads aee service conditions:DL = 680 kN LL = 400kNf'c = 20.7 Mpa fy = 275 MPa Calculate the nominal punching-shear stress acting at the critical section of the footing slab if the thickness of the slab is 450 mm. (Correct Answer 1.99)
Problem 2. A rectangular footing supports a square column concentrically. Given: Footing Dimensions: 3.0m wide x 4.5m long and 0.75m depth Column Dimensions: 0.40m x 0.40m Concrete, fc’ = 21MPa Steel, fy = 275MPa Concrete cover to the centroid of steel reinforcements = 110mm Unit weight of concrete = 23.5kN/m3 Unit weight of soil = 16kN/m3 Determine the concentrated load that the footing can carry based on beam action. Calculate the concentrated load that the footing can carry based on two-way action. If the allowable soil pressure at service loads is 200kPa, what column axial load (unfactored) in kN can the footing carry if depth of earth fill is 2.0m above the footing?