Bridge Technology Consulting




BTC President Publications Books & Journals Achievements Awards Articles

Bridge Technology Consulting BTC Bridge Technology Consulting (BTC) is a premier bridge engineering firm and a world leader in the evaluation, design, rehabilitation, and health monitoring technology of bridge structures. BTC has impressive credentials in bridge design, bridge cable design and strength evaluation, and bridge condition assessment. BTC has developed the BTC Method, a comprehensive, state-of-the-art, patented methodology for the evaluation of the remaining strength and residual life of bridge cables. BTC specializes in bridge design, rehabilitation, instrumentation, inspection, and evaluation of fatigue-vulnerable details. We pride ourselves in the quality of services to our clients and our commitment to excellence.

President

Dr. Khaled Mahmoud, the President of Bridge Technology Consulting, is an internationally renowned long span bridge engineer. Dr. Mahmoud is a pioneer in the design, strength evaluation and fracture behavior of bridge cables. He is the inventor of the BTC method, a comprehensive patented methodology for the evaluation of remaining strength and residual life of bridge cables. The BTC method was recently applied to assess the remaining strength of main suspension cables at the Bronx-Whitestone Bridge and Mid-Hudson Bridge; both in the United States. Dr. Mahmoud is the Principal Investigator for a National Science Foundation Project of a cable mock-up for health monitoring of bridge cables. The project is one of a kind with a cable mock-up loaded with load level that is identical to the load level in real life bridge cables. Dr. Mahmoud is the editor-in-chief of the Journal of Bridge Structures and the editor of five books on Bridge Engineering. He is the Chairman of the Bridge Engineering Association, organizer of the New York City Bridge Conference. He is the former chairman of the American Society of Civil Engineers’ Committee on Cable-Supported Bridges. Dr. Mahmoud teaches Bridge Engineering and Fracture Mechanics at Polytechnic of New York University (NYU). He has been invited as visiting professor and keynote speaker in Brazil, Egypt, France, Italy, the Netherlands, Turkey, UAE, and the United Kingdom. Dr. Mahmoud is a Licensed Professional Engineer in the states of New York, California and Washington.

Education
Ph.D., Engineering Mechanics, The City University of New York.
M.S., Structural Engineering, The City University of New York.
B.Sc., Structural Engineering, Ain Shams University, Egypt.

Edited Books:
Modern Techniques in Bridge Engineering, Taylor & Francis, 2011.
Safety & Reliability of Bridge Structures, CRC Press, 2009.
Innovations in Bridge Engineering Technology, Taylor & Francis, 2007.
Advances in Cable-Supported Bridges, Taylor & Francis, 2006.
Recent Developments in Bridge Engineering, Balkema, 2003.

Journals:
Editor-in-Chief, Journal of Bridge Structures, IOS Press

Professional Licenses:
Licensed Professional Engineer in California, New York & Washington

Selected Projects Prior to Establishing BTC:

Simon Kenton Memorial Suspension Bridge, Kentucky – Deck Replacement Analysis
Bordeaux Lift Bridge over the Garonne River, Bordeaux, France – Preliminary Design
Cape Girardeau Cable-Stayed Bridge, Missouri – Seismic Study
Manhattan Bridge, New York City – Investigation of Fatigue Cracks on Verticals of Stiffening Trusses
Beaver Dam Bascule Bridge, Ocean County, New Jersey – Structural Design
Belt Parkway Bascule Bridge over Mill Basin, Brooklyn, New York – Rehabilitation Design

Publications

Corrosion and Embrittlement Cracking of Suspension Bridge Cable Wires, First International Conference on Bridge Maintenance, Safety and Management, Barcelona, Spain, July 14-17, 2002.
Hydrogen-Induced Degradation of Suspension Bridge Cables. First US-Italy Workshop on Bridge Design and Construction, Rome, Italy, July 18-20, 2002.
Deterioration of Suspension Bridge Cable Wires. 82nd Annual Meeting of the Transportation Research Board, Washington, D.C., January 12-16, 2003.
Hydrogen Embrittlement, in: G. C. Sih, S. Sakai and V. E. Panin (Eds.), Mesomechanics of Computation and Design of Use-Specific Materials: Simulation and Fabrication of Advanced Materials with Mesoscopic Structures, University of Tokyo, 2003.
Hydrogen Embrittlement of Suspension Bridge Cable Wires. System-Based Vision for Strategic and Creative Design, Bontempi, Editor. Swets & Zeitlinger, Lisse, 2003.
An Absorbing Process. Bridge Design & Engineering, Second Quarter, 2003.
Degradation Mechanics of Bridge Cables, Keynote at the 11th International Structural Faults & Repair Conference, Edinburgh, Scotland, June 13-15, 2006.
Developments in the Strength Assessment of Bridge Cables. 86th Annual Meeting of the Transportation Research Board. Washington, D.C., January 12-16, 2007.
Bridge Cable Health Monitoring and strength Evaluation, Seventh International Symposium on CABLE DYNAMICS, Vienna, Austria, December 10-13, 2007.
Damage Accumulation for Growth of an Anti-Plane Crack in a Work-Hardening Material, Theoretical and Applied Fracture Mechanics, Vol. 29, No. 1, pp. 41-48, 1998.
Damage Field ahead of a Tensile Crack in an Elastic-Plastic and Viscoplastic Material, International Journal of Fracture, Vol. 96, pp. 149-165, 1999.
Seismic Design and Retrofit of Highway Bridges, Civil Engineering Seminar, The City College of New York, March 1999.
Modeling the Fatigue Process in highway Bridges. The RILEM/CIB/ISO International Symposium on Integrated Life-Cycle Design of Materials and Structures, Helsinki, Finland, May 22-24, 2000.
Weak-Link Analysis for Seismic Retrofit of Bridge Structures, First International Structural Engineering and Construction Conference, Honolulu, Hawaii, January 24-26, 2001.
Micromechanics of Fatigue Failure in Steel Bridges, First International Structural Engineering and Construction Conference, Honolulu, Hawaii, January 24-26, 2001.
The Role of Microvoids in Reducing Fatigue Service Life of Steel Bridges, ASCE Metropolitan Section/Structures Group Spring Seminar, New York, April 2001.
Accessible and Cost-effective Approach for Seismic Retrofit of Bridges, ASCE Structures Congress and Exposition, Retrofit of Existing Bridges Session, Washington D.C., May 21-23, 2001.
Control of Seismically Excited Cable-Stayed Bridge Using resetting Semi-Active Stiffness Dampers, ASCE Journal of Bridge Engineering, Vol.6, No.6, pp. 376-384, Nov./Dec. 2001.
Deterministic Modeling for Response of Bridges to Non-uniform Seismic Excitation, Journal of Bridge Engineering, Vol.6, No.6, pp. 587-597, Nov./Dec. 2001.
Fatigue Health of Steel Bridges - An Investigation of Cracking Potential due to Microvoids, ASCE Structures Congress and Exposition, Denver, Colorado, 2002.