2. A spread footing of 1.2 x 1.8 m (B = 1.2 m, L= 1.8 m) is loaded with a resultant force at its center, inclined at 20° to the vertical in the plane perpendicular to the footing length. Calculate the bearing capacity of this footing in MN. Use Prandtl/Reissner/Hansen bearing capacity factors.

2. A spread footing of 1.2 x 1.8 m (B = 1.2 m, L= 1.8 m) is loaded with a resultant force at its center, inclined at 20° to the vertical in the plane perpendicular to the footing length. Calculate the bearing capacity of this footing in MN. Use Prandtl/Reissner/Hansen bearing capacity factors.

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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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

2. A spread footing of 1.2 x 1.8 m (B = 1.2 m, L = 1.8 m) is loaded with a resultant
force at its center, inclined at 20° to the vertical in the plane perpendicular to the
footing length. Calculate the bearing capacity of this footing in MN.
Use Prandtl/Reissner/Hansen bearing capacity factors.
20° P
Y = 16.0 kN/m'
c' = 0
d' = 32°
D 1.5 m
1.20 m
y = 19.0 kN/m
Y = 20.0 kN/m'
c' = 0 kPa
d' = 340
1.00 m

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Step 1:-Write Hansen bearing capacity equation.

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Step 2:-Find bearing capacity factors and shape factors.

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Step 3:-Find depth factors and inclination factors.

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Step 4:-Find Bearing capacity of soil.

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