A wall footing has a width of 1.8 m supporting a wall having a width of 0.16m. The thickness of the footing is 0.39m, and the bottom of the footing is 1.7m below the ground surface. If the gross allowable bearing pressure is 178 kPa, determine the actual critical shear acting on the footing, in KN. P(dead load) = 284 KN/m P(live load) 130 KN/m yconcrete = 24 KN/m3 ysoil = 18 KN/m3 Depth of top of footing to NGL = 1 m concrete cover = 75mm assume db = 16mm dia.

A wall footing has a width of 1.8 m supporting a wall having a width of 0.16m. The thickness of the footing is 0.39m, and the bottom of the footing is 1.7m below the ground surface. If the gross allowable bearing pressure is 178 kPa, determine the actual critical shear acting on the footing, in KN. P(dead load) = 284 KN/m P(live load) 130 KN/m yconcrete = 24 KN/m3 ysoil = 18 KN/m3 Depth of top of footing to NGL = 1 m concrete cover = 75mm assume db = 16mm dia.

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

B Calculate the ratio of the Ultimate Shear Force to Shear Capacity in one-way shear. Consider critical case only. A rectangular footing has dimensions shown and is acted upon by a dead load of 653 kN and a live load of 647 kN. The column dimension is 269x677 mm where the shorter dimension is parallel to B. The thickness of the footing is 442mm. f'c-28 MPa and fy=420 MPa for diameter 20mm bars. A=2.9m and B=4.8m
A continuous strip footing is to be located concentrically under a 12 in. wall that delivers service loads D = 25,000 lb/ft and L = 15,000 lb/ft to the top of the footing. The bottom of the footing will be 4 ft below the final ground surface. The soil has a density of 120 pcf and allowable bearing capacity of 8000 psf. Material strengths are f = 3000 psi and f, = 60,000 psi. Find (a) the required width of the footing, (b) the required effective and total depths, based on shear, and (c) the required flexural steel area.
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)
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 = 400KN f'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.
8. A rectangular footing 2.5m wide along the x-axis and 3m long parallel to the y-axis supports a concentrically located column 0.6m x 0.6m in area. Given: Footing ultimate loads Axial load, Pu = 1540kN Moment about the y-axis, My = 190kN∙m Effective depth of footing = 350mm Concrete f’c = 21MPa Steel, Fy = 275MPaa. Find the maximum punching shear stress (MPa) due to the axial load only. b. What is maximum wide beam shear stress (MPa) due to the given footing loads? c. How much additional moment (kN∙m) can the footing carry without causing uplift of the footing?
Refer to NSCP 2015 Design an interior isolated wall footing that carries a uniform dead load of 15 kN/m, a uniform live load of 18.7 kN/m as transmitted by the 250 mm THK concrete wall pedestal. The footing is placed 1.5 m below the NGL. Use ysoil = 17.2 kN/m³, yconcrete = 23.6 kN/m³, fc = 27.6 MPa, and fy = 276 MPa. Use 16 mm diameter for main reinforcements. The allowable soil bearing capacity is 227 kPa. The dimensions were intended to have 3:5 ratio Determine the ultimate moment per meter length
A rectangular footing has dimensions shown and is acted upon by a dead load of 668.00 kN and a live load of 551.00 kN. The column dimension is 282x572 mm where the shorter dimension is parallel to B. The thickness of the footing is 564mm. f'c=28 MPa and fy=420 MPa for diameter 20mm bars. A=3.3m and B=5.7m Calculate the ratio of the Ultimate Shear Force to Shear Capacity in one- way shear. Consider critical case only. Answer is 0.6175 (Complete Solution)A
A square footing is to be designed to carry a total axial load of 5000kg. The bottom of the footing is 2.8m below the ground surface, and the groundwater table is located at the bottom of the footing. Take PDRY = 1860kg/m3 and PSAT = 1950kg/m3, c = 1600kg/m2, Ø = 30degrees. Use the given Chart for the 90 80 70 determination of the bearing capacity factors. a. Determine the dimension of the footing using a factor of safety of 2. b. Compute the ultimate bearing capacity of the soil in kPa. Compute the net allowable bearing capacity of the soil. 60 Ng Nr 50 С. 40 30 20 10 10 20 30 40 50 Friction Angle Nc, Nq, Nr
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 rectangular footing has dimensions shown and is acted upon by a dead load of 1200 kN and a live load of 1600 kN. The column dimensions is 300x600 where the shorter dimension is parallel to B. The thickness of the footing is 500mm. f'c = 28 MPa and fy = 420 MPa for diameter 20mm bars. A = 2.4m and B = 4.2m Calculate the Following: A.) Critical Ultimate Shear Strength and Shear Force of the footing for beam shear action, kNB.) Critical wide beam nominal shear stress, MPaC.) Ultimate Shear Strength of the footing in punching shear action, kN Please answer it ASAP and correctly for upvotes.
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
Problem 1 A 300 mm x 400 mm column is to be supported by a 2 m x 2 m x 0.4 m thick footing @ its center. Service DL = 520 kN, service LL = 320 kN, CC to bar centroid is 90 mm, fc' = 21 MPa and fy = 414 MPa. %3D 300 400 300 400 Determine the critical wide beam shear stress. (Nominal and ultimate) Determine the critical punching shear stress. (Nominal and ultimate) Determine the required number of 20 mm ø bars parallel to the critical side.