Behnam Mahmoodzadegan - Profile on Academia.edu (original) (raw)

Address: Dubai, United Arab Emirates

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Papers by Behnam Mahmoodzadegan

Iyengar from the Computer Science Department for serving on my dissertation committee. In particu... more Iyengar from the Computer Science Department for serving on my dissertation committee. In particular, Professor M. T. Tumay is thanked for his useful comments regarding the in-situ test results, and for his careful review of the draft. My deep appreciation goes to Professor A. Arman, the Director of the Louisiana Transportation Research Center (LTRC) at the time this research started, for authorizing the use of the LTRC facilities for installation and maintenace of the triaxial loading system and its auxiliary units. The research grant from the French Ministry of Research al1ocated for the in-situ phase of this study is great 1y appreciated. Specially, Professor F. Schlosser is thanked for initiating the joint research program between LSU and the Ministry of Research. A special thank goes to M r. Bil 1 Tierney for his assistance in performing the in-situ tests. I wish to also extend my appreciation to my parents for their continued moral support, and specially to my wife without whose constant patience and encouragement this work would have never been completed.

Numerical and Experimental Study of Sampling Disturbance

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...

Evaluation of methods and materials used to attach strain gages to polymer grids for high strain conditions

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.

Interpretation Procedure for Pressuremeter Tests in Sand

Journal of Geotechnical Engineering, 1989

Iyengar from the Computer Science Department for serving on my dissertation committee. In particu... more Iyengar from the Computer Science Department for serving on my dissertation committee. In particular, Professor M. T. Tumay is thanked for his useful comments regarding the in-situ test results, and for his careful review of the draft. My deep appreciation goes to Professor A. Arman, the Director of the Louisiana Transportation Research Center (LTRC) at the time this research started, for authorizing the use of the LTRC facilities for installation and maintenace of the triaxial loading system and its auxiliary units. The research grant from the French Ministry of Research al1ocated for the in-situ phase of this study is great 1y appreciated. Specially, Professor F. Schlosser is thanked for initiating the joint research program between LSU and the Ministry of Research. A special thank goes to M r. Bil 1 Tierney for his assistance in performing the in-situ tests. I wish to also extend my appreciation to my parents for their continued moral support, and specially to my wife without whose constant patience and encouragement this work would have never been completed.

Numerical and Experimental Study of Sampling Disturbance

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...

Evaluation of methods and materials used to attach strain gages to polymer grids for high strain conditions

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.

Interpretation Procedure for Pressuremeter Tests in Sand

Journal of Geotechnical Engineering, 1989

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