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 (fak)=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 elevation of the footing showing reinforcement details.

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 (fak)=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 elevation of the footing showing reinforcement details.

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 square column with side dimension of 40 mm rests on top of a timber footing. It is determined that the column carries an axial load of 621 kN. If the punching strength of concrete is 17.40 MPa, determine the minimum thickness (mm) of the footing.
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A rectangular footing 2.1 m x 3.2 m x 0.37 m thick supports a 300 mm square column at its center. Column loads are service conditions: DL = 363 kN LL = 291 kN f'c = 21 MPa Fy = 415 MPa Concrete cover to the centroid of steel reinforcement = 100 mm Calculate the nominal punching shear stress in the slab. Write your final answer with 2 decimal places if the unit is MPa.
Problem 8.26 WD = 20 kN/m wj. = 36 kN/m 4 m concrete cover is 40 mm 6 #29 450 450 mm 70 mm 800 mm 730 mm For each of the problems, you must perform the following Recalculate the effective depth assuming concrete cover of 40 mm, and use only your calculated effective depth to answer the questions. Shear strength of concrete must be calculated using both the simplified and detailed methods of ACI318 Table 22.5.5.1. -Verity the spacing between main reinforcing bars satisfies AC1318 minimum spacing requirements. -Demonstrate the calculation of the shear forces needed to answer the questions including a fully labelled shear force diagram. The diagram must show the location within the span where 1) no shear force is required (if any), 2) minimum shear force is required (if any). Sketch (manual sketches OK) the beam and show the main reinforcement and distribution of shear reinforcement along the span, including distances where each spacing applies.
a rectangular footing 2.3 m x 3.3 m x 0.31 m thick supports a 300 mm square column at its center. column loads are service conditions:DL = 385 kN LL = 292 kN f'c = 21 MPa fy = 415 MPa Concrete cover to the centroid of steel reinforcement = 100 mm calculate the nominal punching shear stress in the slab. write your final answer with 2 decimal places if the unit is MPA.
a square footing 2.4 m x 0.34 m thick supports a 300 mm square column at its center. column loads are at service conditions dl = 346 kn, ll = 231 kn, fc' = 21 mpa, and fy = 415 mpa. concrete cover to the centroid of steel reinforcement is 100 mm. calculate the nominal one way shear stress in the slab
Q3) The reinforced concrete beam having span of 6 m carrying total design load of 30.6 kN/m as shown in figure Q3. Using following design data, design main reinforcement for the beam. Design data: The characteristic strength of reinforcement steel (f,) = 500 N/mm? The characteristic strength of concrete is (feu) = 30 N/mm². Diameter of tension reinforcement is 25 mm, Diameter of compression reinforcement is 16 mm if required. Diameter of shear link 8 mm Concrete cover 40 mm, 30.6 kN/m h-370 mm b- 230 mm Section A-A
A square column with side dimension of 40 mm rests on top of a timber footing. It is determined that the column carries an axial load of 621 kN. If the punching strength of concrete is 17.40 MPa, determine the minimum thickness (mm) of the footing.
A rectangular footing 23 m x 32 m x 0.34 m thick supports a 300 mm square column at its center. Column loads are service conditions: DL = 341 kN LL = 216 kN fc = 21 MPa fy = 415 MPa Concrete cover to the centroid of steel reinforcement = 100 mm Calculate the nominal punching shear stress in the slab Write your final answer with 2 decimal places if the unit is MPA
29 A square footing 2.2 m x 0.39 m thick supports a 300 mm square column at its center. Column loads are service conditions: DL = 317 kN LL = 217 kN f’c = 21 MPa fy = 415 MPa Concrete cover to the centroid of steel reinforcement = 100 mm Calculate the nominal one way shear stress in the slab. Write your final answer with 2 decimal places if the unit is MPA.
Q3) The reinforced concrete beam having span of 5 m carrying total design load of 22 kN/m as shown in figure Q3. Using following design data, design main reinforcement for the beam and shear reinforcement for beam. Design data: The characteristic strength for main reinforcement (fy) = 500 N/mm? The characteristic strength for shear reinforcement (fyv) = 250 N/mm? The characteristic strength of concrete is (feu) = 30 N/mm?. Diameter of tension reinforcement is 25 mm, Diameter of compression reinforcement is 16 mm if required. Diameter of shear link 8 mm Concrete cover 25 mm, h- 300 mm 22 kN/m 5 m b- 200 mm Section A-A Figure Q3
a square footing 2.4 m x 2.4 m x 0.45 m thick supports a 300 mm square column at its center. column loads are at service conditions dl = 346 kn, ll = 231 kn, fc' = 21 mpa, and fy = 415 mpa. concrete cover to the centroid of steel reinforcement is 100 mm. calculate the nominal one way shear stress in the slab