A 1mx1m square concrete footing carrying a vertical load of 500KN founded on fully saturated clay. Which of the following statement is correct? a. The contact pressure between the footing and the clay is 50 kPa. Ob. The contact pressure between the footing and the clay is 500 kPa O c. The vertical induced stress at 1m depth below the centre of the footing in the clay is more than 500 kPa. Od. The vertical stress increase at 1m depth below the centre of the footing in the clay is 50kPa.

A 1mx1m square concrete footing carrying a vertical load of 500KN founded on fully saturated clay. Which of the following statement is correct? a. The contact pressure between the footing and the clay is 50 kPa. Ob. The contact pressure between the footing and the clay is 500 kPa O c. The vertical induced stress at 1m depth below the centre of the footing in the clay is more than 500 kPa. Od. The vertical stress increase at 1m depth below the centre of the footing in the clay is 50kPa.

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 1mx1m square concrete footing carrying a vertical
load of 500KN founded on fully saturated clay. Which
of the following statement is correct?
a. The contact pressure between the footing and the clay is 50
kPa.
Ob. The contact pressure between the footing and the clay is 500
kPa
O c. The vertical induced stress at 1m depth below the centre of the
footing in the clay is more than 500 kPa.
Od. The vertical stress increase at 1m depth below the centre of
the footing in the clay is 50kPa.

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