Soil Instabilities - Shear Banding and Liquefaction
Current Research Projects
Shear Banding of Soils
Liquefaction
Inventions:
Developed extensive equipment for testing hollow soil cylinders. SPAC,
the Saada Pneumatic Analog Computer was the first device to test soils
in various synchronized combinations of axial, torsional and spherical
modes. It is presently in use by the Corps of Engineers and Laval University
in Canada.
Ecole Centrale des Arts et Manufactures de Paris, France - 1958
Fellow, American Society of Civil Engineers
Editorial Board - Journal of Soil Dynamics and Earthquake Engineering
Frank H. Neff Distinguished Professor
Richard J. Carroll Memorial Lecturer, Johns Hopkins University.
Outstanding Civil Engineer of the Year, 1992, Cleveland Section
ASCE.
Telford Prize of the Institution of Civil Engineers, U.K., 1995
President, United States Universities Council for Geotechnical Engineering
Research, 1990-1993.
Who's Who in America, Frontier Science and Technology, the World,
Technology, American Men and Women of Science.
Teaching and Research Positions:
Research Associate - Princeton University, 1962
Assistant Professor - Case Western Reserve University, 1962-1967
Associate Professor - Case Western Reserve University, 1967-1972
Professor of Civil Engineering - Case Western Reserve University,
1973-present
Chairman, Department of Civil Engineering - Case Western Reserve
University, 1979 - 1998
Industrial and Government Experience:
Ingenieur at Societe Dumez, Paris, France. Design and construction
of bridge foundations, cylindrical reinforced concrete reservoirs, breakwaters,
dredging, etc.
Member of the Advisory Subcommittee on the Division of Civil and Environmental
Engineering of the National Science Foundation -- Geotechnical Engineering
for four years.
Consultant, Waterways Experiment Station.
Consultant on Mechanical Behavior of Materials, Soil Testing and
Foundation of Structures.
Textbooks:
Elasticity Theory and Applications, 650 pp, Pergamon Press, January, 1974.
Krieger, 1983. Third Printing 1989. Second Edition, 775 pp. Krieger 1993.
Editor:
Constitutive Equations for Granular Non-Cohesive Soils, 733 pp, Balkema,
Rotterdam, 1988 (with G. Bianchini). This volume is essentially a state
of the art text on Constitutive Equations for Non-Cohesive Soils.
Contribution to Handbooks:
"Handbook of Tables for Applied Engineering Science," First Edition, Chemical
Rubber Company.
State of the Art Papers:
"Strength Laboratory Testing of Soils," A State of the Art paper presented
at the ASTM Symposium on the Shear Strength of Soils, June 25, 1980, Chicago,
Illinois, ASTM, STP 740, 1981, pp 7-77 (with F. Townsend). (This is probably
the most quoted state of the art paper in the area of soil testing.)
"Hollow Cylinder Torsional Devices, Their Advantages and Limitations,"
A State of the Art paper presented at the ASTM Symposium on Advanced Triaxial
Testing of Soil and Rock, June 20,1986, Louisville, Kentucky, ASTM, STP
977, 1988, pp 766-795.
Noted Publications:
"Fracture Mechanics and Plasticity in Saturated Clay," ASCE, Proceedings
on the Application of Fracture Mechanics to Geotechnical Engineering, ASCE
Geotechnical Special Publication No. 43, 1994, pp. 21-39, Vallejo and Liang
editors.
"Effect of the Grain Size on the Energy per Unit Volume at the Onset of
Liquefaction." Proceedings: Third International Conference on Recent Advances
in Geotechnical Earthquake Engineering and Soil Dynamics, 1995, St. Louis,
Missouri, pp. 197-202 (with J.L. Figueroa and L. Liang).
"Liquefaction Under Random Loading: A Unit Energy Approach," Journal of
Geotechnical Engineering Division, ASCE, Vol. 121, No. 11, Proc. Paper
8034, pp. 776-781, 1995 (with L. Liang and J.L. Figueroa).
"Shear Strength and Shear Modulus Degradation Models Based on the Dissipated
Unit Energy," Proceedings, XIVth International Conference of Soil Mechanics
and Foundation Engineering, Hamburg, Germany, Sept. 1997. (Refereed Conference)
by J.L. Figueroa, A.S. Saada, D. Kern, and L. Liang, pp. 291-294.
"The Use of Digital Processing in Monitoring Shear Band Development," ASTM
Geotechnical Testing Journal, 1996, Vol. 20, No. 3, September 1997, pp.
324-339 (with L. Liang, J.L. Figueroa and C.T. Cope).
