RAJ SIDDHARTHAN, Ph.D., P.E.

RAJ SIDDHARTHAN

Current Affiliation

  • Professor

Contact Information

  • Department of Civil and Environmental Engineering
    1664 N. Virginia St.
    Mail Stop 0258
    University of Nevada, Reno
    Reno, NV 89557-0258
    T: (775) 784-1411
    F: (775) 784-1390
    Email: siddhart@unr.edu

Education

YEAR DEGREE UNIVERSITY
1984 Ph.D University of British Columbia, Canada
1981 M.S. University of British Columbia, Canada
1977 B.Sc University of Sri Lanka, Sri Lanka

Research Interests

  • Soil response under static and dynamic loading including liquefaction behavior.
  • Dynamic behavior of rigid and flexible retaining walls.
  • Dynamic pavement response to traffic.
  • Pavement materials characterization.
  • Effects of blast loading on saturated medium.
  • Wave loading on offshore slopes.
  • Transportation risk assessment studies

Recent Publications

  • Siddharthan, R.V., El-Gamal, M., and Maragakis, E.A., "Stiffnesses of Abutments on Spread Footing with Cohesionless Backfill,"  Canadian Geotechnical Journal, Vol. 34(5), October  1997, pp. 686-697
  • El-Gamal, M., and Siddharthan, R.V., "Stiffnesses of Abutments on Piles in Seismic Bridge Analyses," Soils and Foundations, Vol. 38(1), March 1998, pp. 77-87.
  • Siddharthan, R.V., Yao, J., and Sebaaly, P.E., “Pavement Strain from Moving Dynamic 3-D Load Distribution,” Journal of Transportation Engrg., ASCE, Vol. 124(6), Nov./Dec. 1998, pp. 557-566.
  • Siddharthan, R.V., and Sebaaly, P.E., “Investigation of AC layer Strains from Wide-Base Tires,” Transportation Research Record No. 1655, 1999, pp. 168 - 174.
  • Siddharthan, R.V., Krishnamenon, N., and Sebaaly, P.E., “Pavement Response Evaluation using Finite-Layer Approach,” Transportation Research Record No. 1709, 2000, pp. 43-49.
  • Ni, S.D., Anderson, J.G., Zeng, Y., and Siddharthan, R.V., “Expected Signature of Nonlinearity on Regression for Strong Ground Motion Parameters,” Bulletin of Seismological Society of America, Vol. 90, 6B, 2000, pp. S53-S64.
  • Meis, R., Maragakis, E.A., and Siddharthan, R., “Static Axial Behavior of Some Typical Restrained Joints,” Journal of Testing and Evaluations, Vol. 29(5), September 2001, pp. 485-491.
  • Siddharthan, R.V., Krishnamenon, N., El-Mously, M., and Sebaaly, P.E., “Investigation of Tire Contact Stress Distributions on Pavement Response,” Journal of Transportation Engineering, ASCE, Vol. 128(2), March/April, 2002, pp. 136-144.
  • Siddharthan, R.V., El-Mously, M., Krishnamenon, N., and Sebaaly, P.E., “Validation of a Pavement Response Model using Full-Scale Field Tests,” International Journal in Pavement Engineering, Vol. 3(2), 2002, pp. 85-93.
  • Sebaaly, P.E., Siddharthan, R., and Huft, D., "Impact of Heavy Vehicles on Low-Volume Roads," Transportation Research Record No. 1819,  Vol. 2, Part 9, TRB, 2003, pp. 228-237.
  • Sebaaly, P.E., Siddharthan, R., El‑Desouky, M., Strand, D., and Huft, D., "Effect of Off‑Road Equipment on Flexible Pavements,"  Transportation Research Record No. 1821,  TRB, 2003, pp. 29-38
  • Siddharthan, R.V., Ganeshwara, V.,  Kutter, B.L., El-Desouky, M., and Whitman, R.V., “Seismic Deformation of Bar Mat MSE Walls I:  Centrifuge Tests,” Journal of Geotechnical and Geo-Environmental Engrg., ASCE, Vol. 130(1), ASCE, January 2004, pp. 14-25.
  • Siddharthan, R.V., Ganeshwara, V.,  Kutter, B.L., El-Desouky, M., and Whitman, R.V., “Seismic Deformation of Bar Mat MSE Walls II: A Multi-Block Model,” Journal of Geotechnical and Geo-Environmental Engrg., ASCE, Vol. 130(1), ASCE, January 2004, pp. 26-35.
  • Siddharthan, R., Sebaaly, P.E., El-Desouky, M., Strand, D., and Huft, D. “Heavy Off-road Vehicle Tire-Pavement Interactions and Response,” Journal of Transportation Engineering, ASCE, Vol. 131(3), March/April 2005, pp. 239-247.
  • Hajj, E.Y., Siddharthan, R.V., and Sebaaly, P.E., “Development of Laboratory-Based Unified Permanent Deformation Model for HMA Mixture,” Journal of Testing and Evaluations, Vol. 35(3), May 2007, pp. 272-280.
  • Hajj, E.Y., Siddharthan, R.V., Sebaaly, P.E., and Wietzel, D., “Hot Mix Asphalt Mixtures for Nevada’s Intersections,” Transportation Research Record No. 2001, TRB, 2007, pp. 73-83.
  • Siddharthan, R.V., and Porbaha, A., “Seismic Response Evaluation of Deep Mixed Improved Ground Part I: Proposed Approach,” Ground Improvement, Vol. 131, Issue G13, Institute of Civil Engineers, UK, August 2008, pp. 153-162.
  • Siddharthan, R.V., and Porbaha, A., “Seismic Response Evaluation of Deep Mixed Improved Ground Part II: Verification,” Ground Improvement, Vol. 131, Issue G13, Institute of Civil Engineers, UK, August 2008, pp. 163-169

Courses Taught

  • Undergraduate Level:
  • Introduction to Geotechnical Engineering
  • Foundation Engineering
  • Computer Applications in Civil Engineering
  • Strength of Materials
  • Retaining Structures
  • Earthquake Engineering
  • Numerical Methods in Civil Engineering
  •  
  • Graduate Level:
  • Advanced Geotechnical Engineering
  • Geotechnical Earthquake Engineering, also Long Distance to UNLV
  • Seepage and Slope Stability

Other Activities within Engineering and Teaching Professions

  • Presented five short courses in Nevada and California on Liquefaction, Seismic Bridge Abutment Design, and Seism ic Response; Delivered as many as 70 presentations in conferences, meetings, and seminars.
  • Presented a Week-long short course on Geotechnical Seismic Design at University of Costa Rica.
  • Received 1997 Shamsher Prakash Foundation Citation for the work on Dynamic Soil-Structure Interaction and Stability of Retaining Structures under Earthquakes.
  • Investigator (PI and Co. PI) of projects totaling more than $3.4 million from a wide variety of sources including, federal (NSF, ARO, DOE, NCHRP, Engineering Foundation), state (Nevada, California), and other sources (e.g. SCEC, EPRI, MCEER).
  • Developed many software- notable ones are TARA and 3D-Move. A modified version of TARA program is routinely used by WES in their seismic response analyses of dams.
  • Served as a Member of many ASCE Technical Committees (Soil Dynamics, Computer Applications, Shock and Vibratory Effects) and EERI and had been a reviewer of proposals and reports for the NSF, ASCE, and US Army.

Awards

  • 1996 EERI Student Research Paper Competition Award was presented to Mahmoud EL- Gamal. His paper was based on his Ph.D. work carried out under my supervision.
  • 1997 Shamsher Prakash Foundation Citation for work on Dynamic Soil Structure Interaction and Stability of Retaining Structures Under Earthquakes

Non-Academic Experience (selected list)

  • Dr. Siddharthan has been involved in a variety of consulting projects for a number firms including:, Klohn Leonoff Consultants, Vancouver; Komex Consultants, Calgary; Exxon, Houston; GAB Corporation, Sacramento; Welsh Engineers, Denver; Pezonella Associates, Reno; EIC Consultants, Denver; Golder Associates, Denver; Harding and Lawson Associates, Reno; WESTECH, Reno; Pacific Eng. & Analysis, El Cerrito; Marvin & Associates, Reno; CNI Consultants, Tucson; Wood Rodgers, Reno; Weidlinger Associates, New York (Verrazano-Narrows bridge retrofit); Summit Engineers, Las Vegas; Robert Maddox & Associates

Research Citations

  • Dr. Siddharthan's work has been cited by over 150 publications. For information visit Citation Index web site at: (Use key word(s): siddharthan r or siddharthan rv) http://apps.isiknowledge.com/summary.do