A 300 mm x 400 mm column is to be supported by 419 m thick square footing @ its center. Service DL = 620 kN, service LL = 538 kN, CC to bar centroid is 90 mm, fc' 22 MPa and fy = 414 MPa. Consider the weight of the footing and soil to be 14.84% %3D %3D of the dead load. SBC = 212 kPa

A 300 mm x 400 mm column is to be supported by 419 m thick square footing @ its center. Service DL = 620 kN, service LL = 538 kN, CC to bar centroid is 90 mm, fc' 22 MPa and fy = 414 MPa. Consider the weight of the footing and soil to be 14.84% %3D %3D of the dead load. SBC = 212 kPa

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 300 mm x 400 mm column is to be supported by 419 m thick square footing @its
center. Service DL = 620 kN, service LL = 538 kN, CC to bar centroid is 90 mm, fc'
22 MPa and fy = 414 MPa. Consider the weight of the footing and soil to be 14.84%
of the dead load. SBC = 212 kPa
300
400
300
Determine the critical ultimate punching shear stress in MPa
Note: Present the width (B) in multiples of 100 mm.

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