Study on Dynamic Soil Behaviour of Yamuna River Sand Using Cyclic Triaxial Test
摘要
This study looks into the behaviour of strain-controlled cyclic triaxial tests performed on a clayey sand specimen. The study’s major purpose was to analyse the impact of strain-controlled loading on the dynamic characteristics of clayey sand and calculate the hysteresis loop by determining the values of Em and Gm at various frequencies like 1.0 Hz, 0.75 Hz, 0.50 Hz, and 0.25 Hz. The strain-controlled test results indicate that both the dynamic Young’s modulus (Em) and dynamic shear modulus (Gm) increase with rising frequency during cyclic triaxial tests (CTT), while maintaining a constant displacement of 0.5 mm. Research results show that the dynamic shear modulus of clayey sand increases with increase in frequency. It will take less time to rearrange and deform under highest frequency and will respond to its stiffness quicker. Additionally, this study explores how loading frequency affects the shear and elastic modulus of clayey sand. Higher loading frequencies cause an increase in shear modulus, suggesting an increase in soil stiffness. The stiffness of a soil under cyclic loading is determined by its dynamic shear modulus (G). It is essential to seismic analysis since it evaluates the possibility of liquefaction during tremors. It is a crucial factor in understanding the relationship between soil and structure. Finally, this study found that strain-controlled cyclic triaxial testing on clayey sand samples resulted in an increase in dynamic shear and elastic modulus with increase in frequency. These results explore the dynamic behaviour of clayey sand under varying load frequencies.