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A platform for research: civil engineering, architecture and urbanism
Effect of admixture’s formulation on the damping of engineered sand
Vibrations due to dynamic loading such as machines and earthquakes are controlled by installing base isolation systems comprising of dampers. Previous study on low frequency resonant-column testing showed that damping ratio of sand increases significantly if viscoelastic admixture (Glycerine and Bentonite) is added. The study, however, did not examine the effect of formulations (Glycerine to Bentonite ratio, GBR) of admixture on damping, which is important for designing practical solutions. This study presents the effect of admixture formulation on dynamic properties of sand at different saturations (fraction of volume of voids). The dynamic properties are measured by conducting high frequency ultrasonic testing. The results indicate that wave velocity is insensitive to saturation or GBR of admixture. The damping ratio, however, changes significantly with increase in saturation and GBR of the admixture. The selection of GBR and saturation level shall be decided on the basis of desired level of vibration amplitudes.
Effect of admixture’s formulation on the damping of engineered sand
Vibrations due to dynamic loading such as machines and earthquakes are controlled by installing base isolation systems comprising of dampers. Previous study on low frequency resonant-column testing showed that damping ratio of sand increases significantly if viscoelastic admixture (Glycerine and Bentonite) is added. The study, however, did not examine the effect of formulations (Glycerine to Bentonite ratio, GBR) of admixture on damping, which is important for designing practical solutions. This study presents the effect of admixture formulation on dynamic properties of sand at different saturations (fraction of volume of voids). The dynamic properties are measured by conducting high frequency ultrasonic testing. The results indicate that wave velocity is insensitive to saturation or GBR of admixture. The damping ratio, however, changes significantly with increase in saturation and GBR of the admixture. The selection of GBR and saturation level shall be decided on the basis of desired level of vibration amplitudes.
Effect of admixture’s formulation on the damping of engineered sand
Khan, Zahid (author) / Attom, Mousa (author) / El Emam, Magdi (author)
International Journal of Geotechnical Engineering ; 14 ; 322-328
2020-04-02
7 pages
Article (Journal)
Electronic Resource
English
Energy dissipation in engineered sand of large damping ratio
| Online Contents | 2013
Energy dissipation in engineered sand of large damping ratio
| Taylor & Francis Verlag | 2013
| Tema Archive | 2001