Ogul Doygun Coauthored a Paper on the Parameter Effects of Large-Strain Damping of Sands in the Journal of Geotechnical and Geoenvironmental Engineering
Ogul Doygun, Ph.D. (California) coauthored a paper entitled "Large-Strain Damping of Sands: Parameter Effects" that was published in the Journal of Geotechnical and Geoenvironmental Engineering in volume 147 on August 2021.Ogul was the lead author, and his coauthors were H. G. Brandes and C. P. Polito.
Ogul Doygun is a Senior Staff Professional based in California focused on civil engineering, geotechnical engineering, and construction quality assurance. His experience also includes geotechnical design for various civil engineering projects.
The Journal of Geotechnical and Geoenvironmental Engineering covers the broad area of practice known as geotechnical engineering. Papers are welcomed on topics such as foundations, retaining structures, soil dynamics, engineering behavior of soil and rock, site characterization, slope stability, dams, rock engineering, earthquake engineering, environmental geotechnics, geosynthetics, computer modeling, groundwater monitoring and restoration, and coastal and geotechnical ocean engineering. Authors are also encouraged to submit papers on new and emerging topics within the general discipline of geotechnical engineering. Theoretical papers are welcomed, but there should be a clear and significant potential for practical application of the theory. Practice-oriented papers and case studies are particularly welcomed and encouraged.
A recently developed damping calculation method for undrained load-controlled cyclic tests was implemented on some 70 cyclic triaxial and direct simple shear tests conducted by various researchers on a range of different sands for a correct understanding of the high-strain (0.1%–4%) damping behavior of sands. The effect of various controlling parameters was investigated, including the shear strain, confining stress, number of cycles, void ratio, gradation, nonplastic fines content, and overconsolidation ratio. The data analysis shows that general trends at high strains are in good agreement with the damping behavior of sands at small strains. The results also indicate a direct correlation between the damping behavior of sands and cyclic strength. The recently proposed guideline on load-controlled damping ratio bounds for clean sands at high strains was also in good agreement with the damping behavior of sands with nonplastic fines content up to 25%.
Learn more about the article: Large-Strain Damping of Sands: Parameter Effects | Journal of Geotechnical and Geoenvironmental Engineering | Vol 147, No 9 (ascelibrary.org)
Learn more about the Journal of Geotechnical and Geoenvironmental Engineering: https://ascelibrary.org/journal/jggefk