A square column 379 mm x 379 mm rests on a square footing. The column supports a dead load of 1,105 kN and a live load of 739 kN. The soil bearing capacity is 300.82 kPa. The base of the footing is 1.84 m below the ground. Assume unit weight of concrete of 24 kN/m3 and unit weight of soil of 17.63 kN/m³. The footing has a thickness of 591 mm and the centroid of the main bars is 100 mm from the bottom of the footing. Calculate the nominal punching shear stress in MPa. Note: Present the width (B) in multiples of 100 mm.

A square column 379 mm x 379 mm rests on a square footing. The column supports a dead load of 1,105 kN and a live load of 739 kN. The soil bearing capacity is 300.82 kPa. The base of the footing is 1.84 m below the ground. Assume unit weight of concrete of 24 kN/m3 and unit weight of soil of 17.63 kN/m³. The footing has a thickness of 591 mm and the centroid of the main bars is 100 mm from the bottom of the footing. Calculate the nominal punching shear stress in MPa. Note: Present the width (B) in multiples of 100 mm.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter10: Mat Foundations

Section: Chapter Questions

Problem 10.2P

See similar textbooks

Similar questions

A square column 422 mm x 422 mm rests on a square footing. The column supports a dead load of 1,014 kN and a live load of 869 kN. The soil bearing capacity is 343.53 kPa. The base of the footing is 1.58 m below the ground. Assume unit weight of concrete of 24 kN/m and unit weight of soil of 16.73 kN/m. The footing has a thickness of 621 mm and the centroid of the main bars is 100 mm from the bottom of the footing. Use fc' = 27.8 %3D MPa, fy 248 MPa. Calculate the number of required number of 16 mm o bars
A square column 363 mm x 363 mm rests on a square footing. The column supports a dead load of 1,290 kN and a live load of 814 kN. The soil bearing capacity is 337.72 kPa. The base of the footing is 1.88 m below the ground. Assume unit weight of concrete of 24 kN/m and unit weight of soil of 17.47 kN/m. The footing has a thickness of 562 mm and the centroid of the main bars is 100 mm from the bottom of the footing. Use fc' 25.86 MPa, fy 248 MPa. Calculate the number of required number of 16 mm o bars Note: Present the width (B) in multiples of 100 mm.
A square column 449 mm x 449 mm rests on a square footing. The column supports a dead load of 1,039 kN and a live load of 830 kN. The soil bearing capacity is 254.26 kPa. The base of the footing is 1.57 m below the ground. Assume unit weight of concrete of 24 kN/m3 and unit weight of soil of 16.6 kN/m3. The footing has a thickness of 597 mm and the centroid of the main bars is 100 mm from the bottom of the footing. Use fc’ = 24.4 MPa, fy = 248 MPa. Calculate the number of required number of 16 mm ϕ bars Note: Present the width (B) in multiples of 100 mm.
A 4.7 m square footing is proposed to be used to support a 398 mm x 398 mm RC column loaded with 860 kN dead load and 654 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 285 kPa. The thickness of the footing is 552 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 Calculate the number of bars required in one direction. Provisions are given below for the minimum area of main reinforcements Reinforcement Type fy. MPa ima Nimist Deformed Bars < 420 MPa 0.0020A Deformed Bars and Welded Wire 2 420 MPa Reinforcement Greater of: 00018 x 420 0.0014A
A 3.5 m square footing is proposed to be used to support a 328 mm x 328 mm RC column loaded with 815 kN dead load and 770 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 314 kPa. The thickness of the footing is 553 mm. f = 21 MPa and f = 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 is 15 (Complete Solution)
A 3.6 m square footing is proposed to be used to support a 530 mm x 309 mm RC column loaded with 704 kN dead load and 530 kN live load. The bottom of the footing is 1.5 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 312 kPa. The thickness of the footing is 525 mm. f'.= 21 MPa and f, = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of %3D concrete. Note: For two-way shear, use an effective depth measured from the top of the footing until the top of the bottom-most bar (d3) What is the ratio of the Demand Shear Force and the Capacity in Two Way Shear? (Vu/phiVn) Answer in 4 decimal places (1.6125, 1.5140, 0.8461, etc.)
A 4.31 m square footing is proposed to be used to support a 331 mm x 361 mm RC column loaded with 586 kN dead load and 561 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 299 kPa. The thickness of the footing is 490 mm. f'c = 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. What is the ratio of the Demand Shear Force and the Capacity in Punching shear? Use an effective depth located midway between the two layers of the bars.
A 3.4 m square footing is proposed to be used to support a 353 mm x 630 mm RC column loaded with 634 kN dead load and 853 kN live load. The bottom of the footing is 2.3 m below the ground. Assume soil weighs 19 kN/m³ and the allowable soil bearing pressure is 314 kPa. The thickness of the footing is 431 mm. f = 21 MPa and f = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m³ as the unit weight of concrete. Note: For two-way shear, use an effective depth measured from the top of the footing until the top of the bottom-most bar (d;) What is the ratio of the Demand Shear Force and the Capacity in Two Way Shear? (Vu/phiVn) Answer is 1.5881 (Complete Solution)
Questio Design an isolated footing to support an interior column 35 cm x 35 cm in cross section and carries a dead load of 1000 kN and live load of 700 kN. The characteristic materials strengths are fy = 460 N/mm2 and feu = 30 N/mm2. Calculate the area of reinforcement required. The soil ultimate bearing capacity is 200 kN/m2 and the depth of the bottom of the foundation from the ground surface is 2 m. The soil unit weight is 18 kN/m3 %3D %3D
A 3.5 m square footing is proposed to be used to support a 328 mm x 328 mm RC column loaded with 815 kN dead load and 770 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 314 kPa. The thickness of the footing is 553 mm. f'c = 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.
A 4.0 m square footing is proposed to be used to support a 766 mm x 766 mm RC column loaded with 550 kN dead load and 590 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 307 kPa. The thickness of the footing is 563 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. You Answered Correct Answer 13
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