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Pad Foundation Design per Eurocode 2 Equations and Calculator
Pad Foundation Design Equations and Calculator per Eurocode 2
Pad foundation design, Geotechnical design calculations include:
- Allowable bearing capacity by Brinch Hansen
- Preliminary sizing of pad footing
- Ultimate bearing pressure
- Flexure design
- Determine K for respective MED
- Area of tensile reinforcement
- Number of reinforcement bars
- Minimum reinforcement requirements
- Maximum reinforcement requirement
- Shear design
- Design punching shear stress
- Concrete shear capacity (without shear reinforcement)
EN 1992 Eurocode 2 applies to the design of buildings and other civil engineering works in plain, reinforced and prestressed concrete. It complies with the principles and requirements for the safety and serviceability of structures, the basis of their design and verification that are given in EN 1990: Basis of structural design. EN Eurocode 2 is concerned with the requirements for resistance, serviceability, durability and fire resistance of concrete structures.
Precision:
Input- Insert the dimensions of the foundation and the column cross-section, the loads with their respective safety factors, the material properties and the groundwater level-only if it's applicable.
Section | ||
---|---|---|
Column size (x,y) | m | |
m | ||
Depth (h) | m | |
Width (B) (x axis) | m | |
Concrete cover | m | |
Length (l) (y axis) | m |
Load and material | ||
---|---|---|
Dead load | kN | |
Live load | kN | |
Moment | kNm | |
Concrete grade | ||
Steel grade | ||
Bar size |
Allowable bearing capacity and soil properties | ||
---|---|---|
Internal shear angle (Φ) | ° | |
Cohesion (C) | kN/m^{2} | |
Unit weight of soil | kN/m^{3} | |
Depth of the foundation from the ground level | m | |
Bearing capacity safety factor |
Ground water effect | ||
---|---|---|
m |
This application Requires Premium Membership to execute calculations
Output results - This will calculate the preliminary sizing (length) in the section table and design a pad foundation for flexure and shear in the tables below from the design input data in the table above.
Geotechnical analysis | ||||
---|---|---|---|---|
Allowable bearing capacity | kN/m^{2} | |||
Ultimate design pressure | kN/m^{2} | |||
Flexure analysis | ||||
Along the shorter span | Along the longer span | |||
Bending moment (M_{ED}) | kNm | kNm | ||
Effective depth (d) | m | m | ||
K value | ||||
Required steel area (A_{s}) | mm^{2} | mm^{2} | ||
Reinforcement bar spacing | mm | mm | ||
Provided steel area (A_{s}) | mm^{2} | mm^{2} |
This application Requires Premium Membership to execute calculations
Shear analysis | Remark | ||
---|---|---|---|
Shear stress at the face of the column (v_{ED,max}) | MPa | ||
Concrete maximum shear strength (v_{Rd,max}) | MPa | ||
Beam shear stress at distance d from the column (v_{ED}) | kN/m | ||
Mpa | |||
Punching shear stress at controlled perimeter u_{1} (v_{ED}) | kN/m | ||
MPa | |||
Steel ratio | % | ||
Concrete shear resistance (v_{RD,c}) | MPa |
Equations used for Steel Column Design Calculator
Source:
Alazar Woldeyohannes
Master's program in Structural Engineering in the School of Mechanical, Aerospace and Civil Engineering
University of Manchester
Email available on request
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