Behnam Mahmoodzadegan | American University in Dubai (original) (raw)
Address: Dubai, United Arab Emirates
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Liquefaction is a phenomenon during which saturated cohesionless soils lose a major portion of th... more Liquefaction is a phenomenon during which saturated cohesionless soils lose a major portion of their shear strength. Liquefaction has been identified as the source of several major failures. In this study, a comprehensive program to investigate the in-situ and laboratory liquefaction potential of sandy soils was carried out. The in-situ testing program included friction cone, seismic cone, piezo-cone, and dual piezo-cone penetration tests. Several in-situ liquefaction procedures were reviewed. Four procedures were selected to evaluate the liquefaction potential of a number of sandy sublayers in two welldocumented sites in the southern Imperial Valley, California. The laboratory testing program included monotonic and cyclic liquefaction tests using two different testing equipment: triaxial and hollow cylinder cell. A new hollow cylinder cell equipment was designed, fabricated and calibrated. This new equipment allows performing monotonic or cyclic cavity expansion tests. Effect of th...
This report concerns the attachment of strain gages to polymer soil reinforcement grids (geogrids... more This report concerns the attachment of strain gages to polymer soil reinforcement grids (geogrids) for high elongation measurements, i.e. 5% and higher. Existing methods of attaching strain gages to geogrids are not suited for measurement of these high strains. Therefore, a research study was initiated to develop practical and repeatable procedures for attaching strain gages to geogrids to monitor large strains. The study involved examination of the factors which can affect the gage-geogrid bond during laboratory unconfined extension tests. Samples of different types of geogrids instrumented with strain gages are pulled at a constant rate and the deformations are measured. Detailed attachment procedures are developed and specific recommendations for strain gage and coating selection are given for two common types of geogrid.
Journal of Geotechnical Engineering, 1989
Liquefaction is a phenomenon during which saturated cohesionless soils lose a major portion of th... more Liquefaction is a phenomenon during which saturated cohesionless soils lose a major portion of their shear strength. Liquefaction has been identified as the source of several major failures. In this study, a comprehensive program to investigate the in-situ and laboratory liquefaction potential of sandy soils was carried out. The in-situ testing program included friction cone, seismic cone, piezo-cone, and dual piezo-cone penetration tests. Several in-situ liquefaction procedures were reviewed. Four procedures were selected to evaluate the liquefaction potential of a number of sandy sublayers in two welldocumented sites in the southern Imperial Valley, California. The laboratory testing program included monotonic and cyclic liquefaction tests using two different testing equipment: triaxial and hollow cylinder cell. A new hollow cylinder cell equipment was designed, fabricated and calibrated. This new equipment allows performing monotonic or cyclic cavity expansion tests. Effect of th...
This report concerns the attachment of strain gages to polymer soil reinforcement grids (geogrids... more This report concerns the attachment of strain gages to polymer soil reinforcement grids (geogrids) for high elongation measurements, i.e. 5% and higher. Existing methods of attaching strain gages to geogrids are not suited for measurement of these high strains. Therefore, a research study was initiated to develop practical and repeatable procedures for attaching strain gages to geogrids to monitor large strains. The study involved examination of the factors which can affect the gage-geogrid bond during laboratory unconfined extension tests. Samples of different types of geogrids instrumented with strain gages are pulled at a constant rate and the deformations are measured. Detailed attachment procedures are developed and specific recommendations for strain gage and coating selection are given for two common types of geogrid.
Journal of Geotechnical Engineering, 1989