A 2.4m x 2.4m square footing supports a 350mm x400mm column.Given data: Thickness of footing= 0.60 mTotal factored axial load= 1,818 kN.Materials:Concrete, fe' = 20.7 MPaSteel bars, fy= 280 MPa(20mm bothways)Clear bar covering= 70 mm. Strength reduction factors = 0.75 for shear= 0.90 for bending.1. Calculate the actual nominal shear stress in the footing (MPa) at critical section forwide-beam action.2. Calculate the actual nominal shear stress in the footing (MPa) at critical section fortwo-way action.

RCC Footing is the base of the column and floor where load transfer is done to the soil from the…

1. Calculate the actual nominal shear stress in the footing (MPa) at critical section for wide-beam action. 2. Calculate the actual nominal shear stress in the footing (MPa) at critical section for two-way action.

1. Calculate the actual nominal shear stress in the footing (MPa) at critical section for wide-beam action. 2. Calculate the actual nominal shear stress in the footing (MPa) at critical section for two-way action.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter8: Stresses In A Soil Mass

Section: Chapter Questions

Problem 8.22P: A flexible circular footing of radius R carries a uniform pressure q. Find the depth (in terms of R)...

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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 2.4m x 2.4m square footing supports a 350mm x400mm column.
Given data: Thickness of footing
= 0.60 m
Total factored axial load= 1,818 kN.
Materials:
Concrete, fe' = 20.7 MPa
Steel bars, fy= 280 MPa
(20mm bothways)
Clear bar covering= 70 mm. Strength reduction factors = 0.75 for shear
= 0.90 for bending.
1. Calculate the actual nominal shear stress in the footing (MPa) at critical section for
wide-beam action.
2. Calculate the actual nominal shear stress in the footing (MPa) at critical section for
two-way action.

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