PROBLEM 1: Design a square footing that supports a 400 mm x 550 mm column. The column carries a service dead load of 980 kN and a service live load of 1110 kN. Use the following properties given: fc' = 30 MPa fy = 275 MPa depth of footing, 1.60 m Unit wt. of soil, 17 kN/m3 Allowable soil bearing capacity, 300 kPa Concrete clear cover, 70 mm Diameter of bar, 25 mm Unit wt. of concrete, 24 kN/m3

PROBLEM 1: Design a square footing that supports a 400 mm x 550 mm column. The column carries a service dead load of 980 kN and a service live load of 1110 kN. Use the following properties given: fc' = 30 MPa fy = 275 MPa depth of footing, 1.60 m Unit wt. of soil, 17 kN/m3 Allowable soil bearing capacity, 300 kPa Concrete clear cover, 70 mm Diameter of bar, 25 mm Unit wt. of concrete, 24 kN/m3

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

PROBLEM 1: Design a square footing that supports a 400 mm x 550 mm column. The column carries a service dead load of 980 KN and a
service live load of 1110 kN. Use the following properties given:
fc' = 30 MPa
fy = 275 MPa
depth of footing, 1.60 m
Unit wt. of soil, 17 kN/m3
Allowable soil bearing capacity, 300 kPa
Concrete clear cover, 70 mm
Diameter of bar, 25 mm
Unit wt. of concrete, 24 kN/m3

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