Vesic's Bearing Capacity Theory

TL;DR

This video explains the basics of bearing capacity theory, including modifications to Terzaghi's theory and the common equation used for all types of footings.

Transcript

hello everyone in this video we are going to discuss basics bearing capacity theory basic in 1973 confirmed that the basic nature of failure surface in soil as suggested by the terzaghi is correct but however the angle which the inclined surface make with the horizontal was found to be closer to 45 degree plus phi dash by 2 instead of phi dash mean... Read More

Key Insights

• 🧔 Basic bearing capacity theory modifies Terzaghi's assumptions about the failure surface angle in soil.
• 👶 The new bearing capacity factors (n_c, n_q, n_gamma) are derived based on the modified assumptions.
• 🅰️ The general bearing capacity equation is a unified equation that can be used for various types of footings.
• 🧑‍🏭 Shape factors, depth factors, and inclination factors are included in the bearing capacity equation to account for different conditions.
• 🧑‍🏭 Hansen's depth factors and Mayerhof-Hanna's inclination factors are commonly used in the basic theory.
• 🧑‍🏭 Strip footings have a shape factor of 1, while rectangular and circular/square footings have different shape factors.
• 🥳 Depth factors are only applicable when the depth-to-width ratio is less than or equal to 1.

Summary & Key Takeaways

• The video discusses the failure surface in soil and how it differs from Terzaghi's assumptions, with the inclined surface being closer to 45 degrees plus phi dash by 2.

• It explains the modified bearing capacity factors (n_c, n_q, and n_gamma) when incorporating the above modification, and introduces the general bearing capacity equation.

• The video also explains the shape factors, depth factors, and inclination factors used in the bearing capacity equation for different types of footings.