Shear Strength of Soil: Mohr-Coulomb, Drained vs Undrained

Shear strength of soil is the maximum shear stress the soil can resist under a specified stress path, drainage condition, and strain level. For drained conditions, it is commonly represented by the Mohr-Coulomb equation τf = c’ + σ’ntanφ’. For saturated fine-grained soil loaded without drainage, strength is often represented by the undrained shear strength … Read more

How to Draw a Shear Force Diagram

A shear force diagram (SFD) shows the internal transverse force V at every section along a beam. Start by finding the support reactions, move from one end of the beam to the other, and update V whenever a reaction, point load, or distributed load is encountered. Under one common sign convention, a downward point load … Read more

Heavy Rain/Landslide_Effective Stress_Shear Stress

산사태_사면해석

Hello. This is Kkoogongnam. Recently, not only Korea, but also India and other countries have been experiencing heavy rainfall. I hope everyone is safe. While watching the news, I thought about why landslides occur when it rains on civil engineering perspective. A landslide is a phenomenon in which soil moves down a slope, such as … Read more