Foundation Engineering

Foundation Engineering

How does changing the internal friction angle of the soil affect the bearing capacity? (Excel Spreadsheet)

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Excel Spreadsheet: #foundation_engineering #bearing_capacity #excel_spreadsheet :

The failure zone under a foundation can be divided into three key parts:
1- Triangular Zone: This zone, directly beneath the foundation, fails in a triangular pattern due to compression. Higher friction angles result in a larger triangular zone, as the soil can better withstand compression without failure.
2- Radial (Logarithmic Spiral) Shear Zone: This zone represents the path of soil failure around the foundation in a spiral pattern. With higher friction angles, the radial shear zone tends to be larger, as the soil can resist shear stresses more effectively.
3- Triangular Rankine Passive Zone: Located outside the failure surface, this zone is under passive stress and contributes to the bearing capacity. Higher friction angles lead to a larger Rankine passive zone, providing more support to the foundation.
💎 In summary, higher friction angles result in larger triple zones, including the triangular, radial shear, and Rankine passive zones. This enlargement collectively contributes to a higher bearing capacity for the foundation.

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Foundation Engineering: Bearing Capacity (Excel)

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Excel Spreadsheet: #foundationengineering #bearing capacity :

The ultimate bearing capacity of soil represents the maximum load per unit area it can withstand without failing or undergoing excessive settlement. It’s crucial in geotechnical engineering for ensuring the safety and stability of structures. Factors like soil type, density, and moisture content influence this capacity, which engineers calculate to design structures capable of withstanding expected loads.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=5qv9k4elXcw&t=16s

Bearing Capacity Factors: Meyerhof, Hansen,Vesić

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Cost-Free Excel Spreadsheet:

In geotechnical engineering, bearing capacity is the soil’s ability to support applied loads. It’s the maximum pressure between the foundation and soil that won’t cause failure. Ultimate bearing capacity is the highest pressure soil can handle without failing, while allowable bearing capacity considers a safety factor. Soft soil may settle under load without failing, so allowable bearing capacity can be based on acceptable settlement. Allowable bearing pressure is the maximum pressure soil can handle without failure, while ultimate bearing capacity is the pressure before failure.
In this freely available Excel spreadsheet, you’ll find Bearing Capacity Factors based on methodologies by Meyerhof, Hansen, and Vesić.

GEOtExcel-Foundation-Engineering-Bearing-Capacity-FactorsDownload