TOPIC 3: DESIGN AND ANALYSIS OF SHALLOW FOUNDATION

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TOPIC 3 DESIGN AND ANALYSIS OF SHALLOW
FOUNDATION
WEEK 8

• CONSTRUCTION DETAILS FOR SHALLOW FOUNDATION

• STRUCTURAL DESIGN OF SHALLOW FOUNDATION

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Learning Outcomes

• Student should be able to
• Specify details for shallow foundation
  construction (CO2-PO10)
• Determine the maximum bending moment
• and shear stress for RC design
• (CO2-PO10)

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Construction Drawings

• Raft Foundation
• Pad Footing
• Details on platform, footing sizes,
• Reinforcement details, design bearing capacity

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RC Design for Pad Foundation

• Determine base area of foundation by dividing
  column load by the allowable bearing pressure on
  the soil.
• Determine overall depth of foundation required by
  punching shear, based on column load only.
• Select type of foundation simple flat or sloping
  upper surface.
• Check dimension by computing beam shear stress at
  critical section, on the basis that diagonal
  shear reinforcements should not be provided.
• Compute bending moment and design the
  reinforcement.
• Check bond stresses in steel.

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Shear stress at the Critical Section Of 1.5d
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Maximum Bending Moment