3. A concrete wall footing is to supports a dead load including its own weight of 324 kN/m and a live load of 240 kN/m. The wall has thickness of 300 mm. The footing base is designed to be laid 1.8 m below ground surface. Assume allowable bearing capacity of soil to be 195 kPa, weighing 16.8 kN/m³ and concrete with weight of 23-5 kN/m. Use factors 1.2 for dead load and 1.6 for live load. Fy = 415 MPa, fc = 20.7 MPa 300 300 Ground Surface Ground Surface N= L0 m 1m Figure 2b Figure 2a Which of the following is the width of the concrete footing? (Trial depth, D = 550 mm, concrete cover =75mm) 3.1 A. 161.92 kPa C. 159.82 kPa B. 162.76 kPa D. 161.10 kPa

3. A concrete wall footing is to supports a dead load including its own weight of 324 kN/m and a live load of 240 kN/m. The wall has thickness of 300 mm. The footing base is designed to be laid 1.8 m below ground surface. Assume allowable bearing capacity of soil to be 195 kPa, weighing 16.8 kN/m³ and concrete with weight of 23-5 kN/m. Use factors 1.2 for dead load and 1.6 for live load. Fy = 415 MPa, fc = 20.7 MPa 300 300 Ground Surface Ground Surface N= L0 m 1m Figure 2b Figure 2a Which of the following is the width of the concrete footing? (Trial depth, D = 550 mm, concrete cover =75mm) 3.1 A. 161.92 kPa C. 159.82 kPa B. 162.76 kPa D. 161.10 kPa

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Give me right solution according to the question.
A footing of size 2.5 m x 2.5 m and 500 mm thick resists characteristic axial loads of 800kN dead and 300 kN imposed from a 400 mm square column. The safe bearing pressure on the soil is 230 kN/m2 and the characteristic material strengths are fcu = 35 N/mm2, fy=460N/mm2. Density of concrete is 24 k N/m3. Cover to all reinforcement is 50 mm. Determine the design load b) Check whether the base pressure is safe c) Design the bending reinforcement, assuming 16 mm diameter bars.
It is required to design and provide reinforcement details for an isolated footing for a column in a building. Following data are available: Data: Safe bearing capacity of soil = 220 kN/m? at a depth of 1 m below ground level Column cross section: 400 mm x 400 mm Characteristic axial permanent action [Dead Load] on column: 1200 kN. Characteristic axial variable action [Imposed Load] on column: 720 kN Characteristic strength of concrete (fk)=30 N/mm2 • Characteristic strength of steel reinforcement (fyk) =500N/mm2 Effective cover to reinforcement on all sides(d') = 50mm. (a) Determine the area and dimensions of the isolated footing required (b) Calculate the effective depth of footing required from punching shear and bending moment considerations. (c) Assess the area and spacing of steel reinforcement required in both directions and compare whether the steel areas provided are within the maximum and minimum steel area requirements. (d) Draw a plan and the longitudinal sectional…
Along footing, 3 ft wide, is located in the slope of a hill whose inclination is 30°. The soil of the hill is sand that has an angle of internal friction of 35° and a unit weight of 115 pcf. If a D/B ratio of 1 is assumed, what wall loading can the footing carry? Use a factor of safety of 3.
The subject is vibration engineering. please make the solution clean and understandable. thanks
A square spread footing supports a square tied column as shown. Assume that the reinforced concrete is normal weight (24 kN/m3) and = 1.00 (NSCP C101-15 Table 419.2.4.2). The column has a height of 3.5 meters. 1. Check NSCP code requirements for the reinforcement: (a) longitudinal bar clear spacing, (b) steel ratio, (c) minimum number of bars, (d) minimum lateral tie size, (e) spacing of ties, and (f) arrangement of ties. 2. Calculate the plan dimensions (L m x L m)of the spread footing. Assume a trial thickness of the footing H = 750 mm. 3. Calculate the effective depth d (mm) considering punching shear (two-way shear).
The material used in the unreinforced expandedfoundation has poor tensile and flexural properties.To ensure that the foundation has sufficientrigidity, the most effective of the followingmeasures is ( )◼A. Adjust the average pressure on the bottom of thefoundation◼B. Control the allowable value of the height-to-widthratio of the foundation steps◼C. Improve the bearing capacity of the subgrade soil◼D. Increase the compressive strength of the material
2. Design a one-way slab to carry a service live load of 4000 Pa. The slab has a length of 4m with both ends continuous. Assume f'c = 21MPa and fy = 415 MPa for main bars and fy=276 MPa for temperature bars. Unit weight of concrete is 23.5 kN/m³.
I need the answer as soon as possible
A 3.3 m square footing is proposed to be used to support a 435 mm x 435 mm RC column loaded with 585 kN dead load and 643 kN live load. The bottom of the footing is 2 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 290 kPa. The thickness of the footing is 459 mm. f'. = 21 MPa and fy = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of concrete. Use an effective depth measured from the top of the footing until the center of the bottom-most bar (d1) Calculate the number of bars required in one direction. Answer in multiples of 1
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
A 300 mm x 400 mm column is to be supported by 419 m thick square footing @its center. Service DL = 620 kN, service LL = 538 kN, CC to bar centroid is 90 mm, fc' 22 MPa and fy = 414 MPa. Consider the weight of the footing and soil to be 14.84% of the dead load. SBC = 212 kPa 300 400 300 Determine the critical ultimate punching shear stress in MPa Note: Present the width (B) in multiples of 100 mm.