Dr. Lotfi specializes in structural assessment, structural rehabilitation, failure investigation, seismic evaluation, and nonlinear finite element simulation of structures. He has applied his expertise to evaluation, retrofit design, and failure investigation of of concrete, steel, and masonry structures including buildings, bridges, parking structures, industrial structures, environmental structures, pipelines, and foundations.
Dr. Lotfi has developed several analytical models for failure analysis of concrete and masonry structures and has implemented them in a nonlinear finite element analysis program. He has conducted extensive static and dynamic finite element analysis of concrete, steel, and masonry structures that involve extreme geometrical and material nonlinearities, instability, impact, and collapse. He is experienced in nonlinear transient heat transfer finite element analysis of structures. He has developed special-purpose computer programs that, by linking to commercial finite element software, make everyday analysis and design of complex structures feasible and easy for the design professionals.
Ph.D. in Civil Engineering
University of Colorado at Boulder, 1992
M.S. in Civil Engineering
University of Tehran, Iran, 1986
Roller, J. J., and Lotfi, H. R, “Proposed Simplified Changes to ANSI/AWWA C304 Standard for Design of Prestressed Concrete Cylinder Pipe”, Proc. of the ASCE Pipeline Conference, Baltimore, MD, 2015.
Lotfi, H.R., Oesterle, R. G., and Roller, J., “Reliability Assessment of Distressed Concrete Cylinder Pipe”, Proc. of the ASCE Pipeline Division Specialty Conference, Houston, TX, pp. 838-852, 2005.
Lotfi, H. R. and Oesterle, R. G., “Analysis and Design of Slab Track Laboratory Specimens”, PCA R&D Serial No. 2795a, Portland Cement Association, Skokie, IL, 2007.
Lotfi, H. R. and Oesterle, R. G., “Slab Tracks for 39-Ton Axle Loads, Structural Design”, PCA R&D Serial No. 2832, Portland Cement Association, Skokie, IL, 2005.
Mehrabi, A. B., Tabatabai, H., and Lotfi, H.R., “Damage Detection in Structures Using Precursor Transformation Method”, Journal of Intelligent Material Systems and Structures, Vol. 9, No. 10, pp. 808-817, 1999.
Mehrabi, A. B., Tabatabai, H., and Lotfi, H. R., “Precursor Transformation Method for Damage Detection in Structures”, 5th Annual International Symposium on Smart Structures and Materials Proceedings, SPIE, pp. 232-243, 1998.
Oesterle, R.G. and Lotfi, H.R., “Transverse Movement in Skewed Integral Abutment Bridges”, Proceedings of the FHWA Integral Abutment and Jointless Bridges Conference, Baltimore, 2005.
Azizinamini, A., Pavel, R., and Lotfi, H.R., “Effect of Cross Bracing on Seismic Performance of Steel I-Girder Bridges”, ASCE Structural Congress, pp. 751-755, 1997.
Lotfi, H.R., and Munshi, J.A., “Preliminary Analytical Investigation of High-Strength Concrete Column Structural Performance Under Fire Loading”, Report to Portland Cement Association, Skokie, IL, 2001.
Lotfi, H.R., and Shing, P.B., “Embedded Representation of Fracture in Concrete with Mixed Finite Elements”, International Journal of Numerical Methods in Engineering, V38, pp. 1307-1325, 1995.
Lotfi, H.R., and Shing, P.B., “Analysis of Concrete Fracture with an Embedded Crack Approach”, Proc. of International Conference on Computer Aided Design of Concrete Structures, Austria, 1994.
Lotfi, H.R., and Shing, P.B., “Interface Model Applied to Fracture of Masonry Structures”, ASCE Journal of Structural Engineering, V120(l), pp. 63-80, 1994.
Shing, P.B., Brunner, J.D., and Lotfi, H.R., “Analysis of Shear Strength of Reinforced Masonry Walls”, Proc. of 6th North American Masonry Conference, pp. 1133-1144, 1993 (Outstanding Conference Paper Award).
Shing, P.B., Brunner, J.D., and Lotfi, H.R, “Evaluation of Shear Strength of Reinforced Masonry Walls”, Masonry Society Journal, 1993.
Lotfi, H.R., and Shing, P.B., “Analysis of Masonry Walls with Smeared and Discrete Crack Models”, ASCE Structural Congress, pp. 1179-1184, 1993.
Shing, P.B., Lotfi, H.R, Barzegarmehrabi, A., and Brunner, J.D., “Failure Analysis of Masonry Structures”, Proc. of 9th ASCE Engineering Mechanics Conference, New York, NY, pp.780-783, 1992.
Shing, P.B., Lotfi, H.R, Barzegarmehrabi, A., and Brunner, J.D., “Finite Element Analysis of Resistance of Masonry Wall Panels With and Without Confining Frames”, Proc. of 10th World Conference on Earthquake Engineering, pp. 2581-2588, 1992.
Lotfi, H.R., and Shing, P.B., “Nonlinear Finite Element Analysis of Reinforced Masonry Shear Walls”, Computational Methods and Experimental Measurements V, A. Sousa et al., Eds., Elsevier Applied Science, New York, NY, pp. 519-530, 1991.
Lotfi, H.R., and Shing, P.B., “An Appraisal of Smeared Crack Models for Masonry Shear Wall Analysis”, Computers and Structures Journal, 41(3), pp. 413-425, 1991.
Shing, P.B., and Lotfi, H.R., “Experimental and Finite Element Analysis of Single-Story Reinforced Masonry Shear Walls”, Computer Methods in Structural Masonry, J. Middleton, and G.N. Pande, Eds., Books and Journals International, Swansea, UK, pp. 74 83, 1991.