A S00 mm thick tooting siab supports a sUU mm thick concrete wall carryıng unitormservice dead load of 214.31 kN/m and service live load of 145.94 kN/m. The base of thewall footing slab is 1.2 m from the ground surface. Design parameters are as follows:Viat = 16 kN/m', Vned = 24 kN/m', q. = 215.46 kPa, f= 27 MPa and f, = 420 MPa.1.Calculate the net allowable bearing capacity of soil in kPa.A. 192.17B. 189.06с. 117.32D. 176.262.Calculate the minimum required width of the wall footing slab.B. 2.0 mC. 1.8 mA. 1.9 mD. 1.7 m3.Calculate the maximum ultimate moment (kN-m) in the slab if the width of thefooting slab is 2.1 m.A. 82.64B. 94.63C. 128.80D. 111.324.Calculate the required center to center spacing of 16 mm bars for fiexure if themaximum factored moment in the slab is 75 kN-m.A. 150 mmB. 180 mmC. 210 mmD. NOTA5.Calculate the ultimate beam shear stress on the footing slab if the footing slab is2.1 m wide.A 1.25 MPaB. 0.74 MPaC. 0.87 MPaD. 0.96 MPa

Answered: Image /qna-images/answer/731be0b8-c9ea-40e0-8b07-ec65392ffe51.jpg

ervice dead load of 214.31 kN/m and service live load of 145.94 kN/m. The base of the vall footing slab is 1.2 m from the ground surface. Design parameters are as follows: soi ▪ 16 kN/m', Vont " 24 kN/m', q. 215.46 kPa, f, 27 MPa and f,- 420 MPa.

ervice dead load of 214.31 kN/m and service live load of 145.94 kN/m. The base of the vall footing slab is 1.2 m from the ground surface. Design parameters are as follows: soi ▪ 16 kN/m', Vont " 24 kN/m', q. 215.46 kPa, f, 27 MPa and f,- 420 MPa.

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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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

A S00 mm thick tooting siab supports a sUU mm thick concrete wall carryıng unitorm
service dead load of 214.31 kN/m and service live load of 145.94 kN/m. The base of the
wall footing slab is 1.2 m from the ground surface. Design parameters are as follows:
Viat = 16 kN/m', Vned = 24 kN/m', q. = 215.46 kPa, f= 27 MPa and f, = 420 MPa.
1.
Calculate the net allowable bearing capacity of soil in kPa.
A. 192.17
B. 189.06
с. 117.32
D. 176.26
2.
Calculate the minimum required width of the wall footing slab.
B. 2.0 m
C. 1.8 m
A. 1.9 m
D. 1.7 m
3.
Calculate the maximum ultimate moment (kN-m) in the slab if the width of the
footing slab is 2.1 m.
A. 82.64
B. 94.63
C. 128.80
D. 111.32
4.
Calculate the required center to center spacing of 16 mm bars for fiexure if the
maximum factored moment in the slab is 75 kN-m.
A. 150 mm
B. 180 mm
C. 210 mm
D. NOTA
5.
Calculate the ultimate beam shear stress on the footing slab if the footing slab is
2.1 m wide.
A 1.25 MPa
B. 0.74 MPa
C. 0.87 MPa
D. 0.96 MPa

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