Experimental Studies on Effect of Load Repetition on Dynamic Characteristics of Saturated Ahmedabad Cohesive Soil

  • Saloni Pandya
  • Ajanta SachanEmail author
Research Paper


The present study investigates the hysteresis response, stiffness degradation/cyclic softening and energy dissipation features of Ahmedabad cohesive soil. Saturated specimens of Ahmedabad cohesive soil were reconstituted using slurry consolidation technique at different void ratios to perform the following series of tests, strain-controlled cyclic triaxial tests, shear strength, and compressibility tests. Load repetition exhibited significant degradation in shear modulus of slurry consolidated cohesive soil specimens under cyclic loading conditions. A maximum stiffness degradation of 78% was observed for the specimen possessing minimum initial void ratio. Hysteresis response of Ahmedabad soil revealed alteration in the rotation angle of hysteresis loops and their sizes with varying initial void ratios of the Ahmedabad cohesive soil. A substantial influence of initial void ratio on the energy dissipation behavior of cohesive soil was depicted in the present study. The cumulative energy dissipation of the specimen prepared with lower initial void ratio was obtained to be 7.1 times higher than the specimen possessing maximum initial void ratio.


Hysteresis response Stiffness degradation Energy dissipation Cyclic triaxial Slurry consolidation Cohesive soil 

List of Symbols


Shear modulus


Damping ratio


Clay with high compressibility


Initial dry density


Initial void ratio


Compression index


Axial strain


Deviatoric stress


Effective vertical stress


Undrained cohesion


Unconfined compression strength


Poisson’s ratio


Initial water content


Cyclic degradation index


Cyclic degradation index of specimen S1


Cyclic degradation index of specimen S2


Cyclic degradation index of specimen S3


Cyclic degradation index of specimen S4


Number of loading cycles


Shear modulus of the soil at the first cycle of loading


Shear modulus of the soil at the Nth cycle of loading


Liquid limit


Plastic limit


Shrinkage limit






Differential free swell index


Energy dissipation at the end of each cycle


Cumulative energy dissipated at the end of each test



Financial support from IIT Gandhinagar is gratefully acknowledged. Any opinions, findings and conclusions or recommendations expressed in this material are those of authors and do not necessarily reflect the views of IIT Gandhinagar.


The research is funded by IIT Gandhinagar (IITGN001).

Compliance with Ethical Standards

Conflict of Interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.


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Copyright information

© Iran University of Science and Technology 2019

Authors and Affiliations

  1. 1.Civil EngineeringIIT GandhinagarGandhinagarIndia

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