1) A footing whose one side spans 4.2m carries a 520 kN dead load and 640kN live load from a reinforced concrete column. The column measures 500mm parallel to the long side of the foundation, and 800mm on the other side. Assume effective soil bearing capacity of 80kPa, concrete compressive strength of 21 MPa, and steel yield strength of 280 MPa. Determine the following: • Dimensions of the footing (use 100mm increments) . The thickness of the footing (use 10mm increments) • Number of 20mm reinforcements along each dimension

1) A footing whose one side spans 4.2m carries a 520 kN dead load and 640kN live load from a reinforced concrete column. The column measures 500mm parallel to the long side of the foundation, and 800mm on the other side. Assume effective soil bearing capacity of 80kPa, concrete compressive strength of 21 MPa, and steel yield strength of 280 MPa. Determine the following: • Dimensions of the footing (use 100mm increments) . The thickness of the footing (use 10mm increments) • Number of 20mm reinforcements along each dimension

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

1) A footing whose one side spans 4.2m carries a 520 kN dead load and 640kN live load from a reinforced
concrete column. The column measures 500mm parallel to the long side of the foundation, and 800mm on
the other side. Assume effective soil bearing capacity of 80kPa, concrete compressive strength of 21 MPa,
and steel yield strength of 280 MPa.
Determine the following:
• Dimensions of the footing (use 100mm increments)
• The thickness of the footing (use 10mm increments)
• Number of 20mm reinforcements along each dimension

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