37.2. Stress-Strain Behavior of Soils under Cyclic Loading

Try these first

1. 1.

   What does the area inside a hysteresis loop represent?

   Hint

   Think about what happens to energy when a material is loaded and unloaded repeatedly.

2. 2.

   What happens to shear modulus as cyclic strain increases?

   Hint

   Consider the effect of continuous loading on material strength.

3. 3.

   What represents energy dissipation in soils during cyclic loading?

   • Shear strength
   • Hysteresis loop
   • Effective stress

   Hint

   Think of the graphical representation of energy behavior.

4. 4.

   True or False: Shear modulus remains constant under cyclic loading.

   • True
   • False

   Hint

   Consider how materials respond under repeated stresses.

5. 5.

   Given a soil layer with a high void ratio, analyze its response when subjected to cyclic loading. Discuss potential outcomes regarding pore water pressure and shear strength.

   Hint

   Remember the relationship between void ratios, saturation, and shear strength.

6. 6.

   How might an engineer mitigate the effects of cyclic loading on a saturated loose sand layer? Provide at least two approaches.

   Hint

   Think about how you can manage excess water within the soil.