Marlon Bazan, Ph.D., P.E., S.E.

Dr. Marlon Bazan joined Protection Engineering Consultants as a Project Engineer in February 2009. He supports and manages design and research projects in broad areas of blast-resistant structures analysis and design.

Marlon has performed design projects subject to ATFP and explosive safety requirements for federal (GSA) and military (DoD) clients, and supports industrial and petrochemical clients with designs and upgrades to resist the effects of accidental explosions.

In addition to design, Marlon supports design tool development through the incorporation of analysis and design methodologies and related response criteria into the Corps of Engineer’s SBEDS (Single-Degree-of-Freedom Blast Effects Design Spreadsheet) program.  Recent efforts have added expanded structural component and retrofit capabilities to that tool.  His research projects have included a test program on shoring systems for urban search and rescue for the Department of Homeland Security (DHS) and investigation of the blast response of steel braced frame structures conducted by PEC for the US Department of State (DoS).

Marlon earned a bachelor’s degree in civil engineering from the National University of Engineering (Lima, Peru) and a MS and PhD in Structural Engineering from Northeastern University.  He is a frequent contributor to and instructor for PEC sponsored short courses.

Eric Sammarco, Ph.D., P.E., F.SEI

Dr. Eric Sammarco joined Protection Engineering Consultants (PEC) in the fall of 2013 and has fourteen (14) years of structural engineering research and design experience. He currently serves as the company’s Advanced Technology + Research (AT+R) Team Leader and manages/supports projects and applied R&D efforts focused on risk mitigation for people, systems and mission-critical infrastructure from natural hazards, extreme accident scenarios, and hostile attacks. Eric’s technical interests include explosives safety site planning and protective design, assessment and design for blast, shock, and impact effects, application of advanced multi-physics modeling and simulation techniques, and application of performance-based analysis and design methodologies for natural and man-made hazards.

Since joining PEC, Eric has worked in several different industry sectors. He has supported licensing-basis and post-Fukushima plant modification projects and security-related assessment/upgrade projects for domestic and international nuclear power plants. He has performed multi-hazard assessments, seismic peer reviews, and seismic risk rating system development for commercial, U.S. military and heavy industrial clients. Eric has been heavily engaged in transportation infrastructure safety and security; key efforts have included primary authorship of the Federal Highway Administration’s (FHWA) Bridge Security Design Manual, chief developer of the Anti-Terrorism Planner for Bridges (ATP-Bridge) software for the Department of Homeland Security (DHS), applied research and development of stay-cable protection strategies for long-span bridges, vulnerability assessment of a highway bridge to the effects of ongoing quarry blasting, and Principal Investigator of a Phase 2 SBIR with the Federal Railroad Administration (FRA) aimed at enhancing rail passenger survivability during a derailment event through resilient wayside structure designs. Eric excels at employing high-fidelity numerical modeling techniques to enhance the accuracy of assessments and optimize risk mitigation strategies; examples include quantifying load effects from landmine detonations, assessments of industrial machines and equipment to accidental explosions, beyond-design-basis seismic capacity assessments, novel tornado missile barrier designs for nuclear plants, and the implementation of a statistical glass-fracture material model into a nonlinear dynamic finite element framework for predicting the blast response of architecturally complex glazed façade systems.

Certifications and Licenses

  • Registered Professional Engineer (PE) [Texas, Missouri]

Committees and Professional Affiliations

  • Member of American Society of Civil Engineers (ASCE) and Structural Engineering Institute (SEI)
  • Board Member of ASCE | SEI Austin, TX Branch
  • Member of ASCE | SEI Blast, Shock, and Impact Committee
  • Member of ASCE | SEI Bridge and Tunnel Security Committee
  • Associate Member of ASCE | SEI Dynamic Analysis of Nuclear Structures (ASCE 4, ASCE 43)
  • Past Associate Member of American Concrete Institute (ACI) Technical Committee 349 Concrete Nuclear Structures
  • Past Associate Member of ACI Technical Committee 370 Blast and Impact Load Effects

Education

  • Ph.D. in Civil Engineering | University of Texas at Austin | 2014
  • M.S. in Civil Engineering | University of Kansas | 2010
  • B.S. in Civil Engineering | University of Kansas | 2006

Publications

  • Sammarco, E. and Williamson, E. (2021). “Dynamic Response Characteristics that Lead to Direct Shear Failure of Blast-Loaded Columns.” ASCE Journal of Structural Engineering, 147(9); DOI 10.1061/(ASCE)ST.1943-541X.0003066.
  • Hadjioannou, M., Sammarco, E., and Barsotti, M. (2019). “Drag Force Simulation on Blast Loaded Fabric Roof.” Proceedings from the 12th European LS-DYNA Conference; Koblenz, Germany.
  • Brewer, T. and Sammarco, E. (2018). “Modeling Façade Performance Subject to Wind Loads in Urban Environments.” Proceedings from the 2018 Façade Tectonics World Congress; Los Angeles, CA.
  • Jones, C., Sammarco, E., and McKay, A. (2018). “Consideration of Disproportionate Collapse Design Provisions in Earthquake Damaged Structures.” Proceedings from the Eleventh U.S. National Conference on Earthquake Engineering; Los Angeles, CA.
  • Barsotti, M., O’Hare, E., Sammarco, E., Rasico, J. G., Gerst, D., and Newman, C. A. (2017). “Accurate Land Mine Modeling Using FEM & SPH with Modified Smoothing Length.” Proceedings from the 2017 NDIA Ground Vehicle Systems Engineering and Technical Symposium; Novi, Michigan.
  • Hadjioannou, M., Barsotti, M., Sammarco, E., and Stevens, D. (2017). “Physical Testing and Modelling of Bolted and Welded Connections for Armored Vehicle Models.” Proceedings from the 2017 NDIA Ground Vehicle Systems Engineering and Technology Symposium; Novi, Michigan.
  • Marchand, K. A., Davis, C. E., Sammarco, E. L., and Bui, J. (2017). “Extending Glass Façade Performance Predictions for Natural and Man-Made Hazards Using Accessible High-Fidelity Formulations.” Proceedings from the 39th IABSE Symposium; Vancouver, Canada.
  • Marchand, K. and Sammarco, E. L. (2016). “When Structural Blast Design Doesn’t Really Include Blast Resistant Design: Damage Limiting Construction and Explosion Protection by Deflagration Venting.” STRUCTURE Magazine, American Society of Civil Engineers; Reston, VA.
  • Barsotti, M., Sammarco, E., and Stevens, D. (2016). “Comparison of Strategies for Landmine Modeling in LS-DYNA with Sandy Soil Material Model Development.” Proceedings, 14th International LS-DYNA Users Conference; Detroit, MI.
  • Sammarco, E., McKay, A., and Marchand, K. (2016). “Enhancing the Security of U.S. Highway Bridges: Making Use of New Technology to Assess Risk and Prioritize Protective Measures.” The Structural Engineer, Journal of the Structural Engineers Association of Texas; Austin, TX.
  • Marchand, K., Davis, C., Sammarco, E., Bui, J., and Casper, J. (2016). “Coupled Glass and Structure Response of Conventional Curtain Walls Subjected to Blast Loads: Validation Tests and Analysis.” Journal of Glass Structures & Engineering.
  • Sammarco, E. L., LaRue, T., Smit, J., and W. Guess. (2015). “Computational Evaluation and Mitigation of Wind-Driven Missile Impact against Condensate Storage Tanks and Associated Piping Connections.” Proceedings, 23rd Structural Mechanics in Reactor Technology (SMiRT23); Manchester, UK.
  • Sammarco, E L. (2014). “Development of Simplified Dynamic Response Models for Blast-Loaded Bridge Components.” Doctoral Dissertation, The University of Texas at Austin; Austin, TX.
  • Sammarco, E. L., Jones, C. A., Williamson, E. B., and H. O. Sprague. (2014). “Design for Blast and Seismic: Acknowledging Differences and Leveraging Synergies.” STRUCTURE Magazine, American Society of Civil Engineers; Reston, VA.
  • Harris, K. D., Robinson, N., and L. Sammarco. (2013). “Seismic Time Histories: A Practical Approach.” STRUCTURE Magazine, American Society of Civil Engineers; Reston, VA.
  • Puryear, J., Barsotti, M., Stevens, D., Williamson, E. B., Sammarco, E. L., Bui, J. Q., and Crane, C. K. (2013). “Modeling Blast-Loaded Steel Cables.” Symposium on Interaction of the Effects of Munitions with Structures; Potsdam, Germany.
  • Puryear, J., Stevens, D., Marchand, K., Williamson, E. B., Sammarco, E. L., Bui, J. Q., and Crane, C. K. (2013). “Predicting Spall and Breach for Blast-Loaded Reinforced Concrete Columns.” Symposium on Interaction of the Effects of Munitions with Structures; Potsdam, Germany.
  • Sammarco, E. L., Bui, J. Q., Williamson, E. B., Puryear, J., Stevens, D., and Crane, C. K., (2013). “From Research to Practice: A Novel Vulnerability Assessment Software for Blast-Loaded Bridge Components.” Symposium on Interaction of the Effects of Munitions with Structures; Potsdam, Germany.
  • Sammarco, E. L., Bui, J. Q., Hendryx, R., Williamson, E. B., Puryear, J. M. H., Stevens, D. J., and Crane, C. K. (2013). “Enhancing the Security of Critical Highway Infrastructure: Development of Component-Level Vulnerability Assessment Software for Blast-Loaded Bridges.” The 2013 Critical Infrastructure Symposium; West Point, NY.
  • Biography article in Civil + Structural Engineer Magazine, January 2013. <http://csengineermag.com/article/youre-looking-at-the-future/>
  • Sammarco, E. L., Hendryx, R., Bui, J. Q., Williamson, E. B., Crane, C. K., and Ray, J. C. (2012). “Development of a Novel Engineering Tool for Assessing Vulnerability of Critical Highway Bridge Components Subjected to Blast.” Proceedings, 4th Munich Bridge Assessment Conference; Munich, Germany.
  • Sammarco, E. L., Williamson, E. B., and Davis, C. (2011). “Enhancing the Security of U.S. Highway Bridges: Developing Protective Design Guidance, Tools, and Techniques.” Transportation Research News Magazine, Transportation Research Board; Washington, D.C.
  • Williamson, E. B., Sammarco, E. L., Hendryx, R., and Bui, J. (2011). “Addressing the Vulnerability of U.S. Highway Bridges to Terrorist Attacks: A Structural Engineering Perspective.” Proceedings, 5th Annual Department of Homeland Security University Network Summit, U.S. Department of Homeland Security; Washington, D.C.
  • Sammarco, E. L., and A. B. Matamoros. (2010). “Plasticity-Based Nonlinear Finite Element Analysis of Reinforced Concrete Columns with Inadequate Seismic Detailing.” Proceedings, US-Canada Joint Conference on Earthquake Engineering, EERI; Toronto, Canada.

Matt Barsotti

Matt Barsotti joined Protection Engineering Consultants in 2007, and he has 20 years of applied research, engineering, and data science experience. He currently leads the company’s efforts in engineering analytics, a focus area at the intersection of first-principles engineering analysis and cutting-edge data science. Matt’s technical interests span a broad range of disciplines, including modeling and simulation, data science, algorithm development, material characterization, large scale testing, debris modeling, etc. He routinely leads projects by assembling, managing, and collaborating with interdisciplinary teams of engineers and scientists from disparate fields. His clientele has included DARPA, National Academy of Science TRB/ACRP, DOS, US Army, US Air Force, US Marine Corps, DTRA, MDA, ERDC, TSWG, etc.

Since joining PEC, Matt has worked on a broad range of advanced research and development efforts. He has extensive experience in numerical modeling of soil materials subjected to high rate and explosive loads. His novel work resulted in a generalized sandy soil model capable of making high accuracy predictions for a broad range of explosive test cases with arbitrary degrees of pre-compaction and moisture content. He has developed multiple fast-running models (FRMs) for several applications, including explosively-loaded bridge cables, aircraft tire overruns in compressible soil media, glass and concrete fragment flyout, ground shock propagation, etc. He is a leading expert in the niche field of Engineered Materials Arrestor Systems (EMAS), which are installed at civil airports and employ crushable foam materials to arrest aircraft during emergency overruns.

His present efforts focus on cutting edge areas of development. In the area of artificial intelligence, he is developing software to automate the construction of physics-based models using genetic programming, which can evolve and discover equations that capture the underlying physics of various problems. In data analytics, he has led the development of improved statistical algorithms for modeling debris created during explosion events. And in testing, he is leading a development effort to employ high-powered laser ablation to test metals at very high strain rates.

Other areas of prior work have included • Machine Learning • Genetic Programming • Laser Ablation Testing • Spectral Analysis • Fast Running Models • Land Mine and Improvised Explosive Device (IED) • Penetration Mechanics • Pipeline Vulnerability • Bridge Cable Armor • Glass Hazard Analysis • Transparent Armor Spall • Eye Injury • Low Friction Vehicle Counter-mobility • Bolted Connection Modeling • Steel Triaxiality Modeling • Fluid Modeling • Tire Modeling • Armored Vehicle Floor System Design • Crushable Foam Modeling • Ground Vehicle Stability Analysis • Concrete and Glass Fragmentation Modeling • Underwater and Deeply Buried Explosions • Explosively Formed Metal Structures • Glass Foams • Helmet Material Analysis • Polymer Materials • Auxetic Materials.

Education

  • M.S. in Mechanical Engineering | University of Texas at San Antonio | 2008
  • B.E. with a Mechanical Emphasis | John Brown University | 2000 | Summa Cum Laude

Selected Publications

  • Krouse, C., Musgrove, G., Kantrales, G., Barsotti, M., Schoenheit, A., Vandergriff, T. (2019) “Wind Tunnel Testing of Low Solidity Wire Mesh Screens for Large Object Filtration.” Proceedings of ASME Turbo Expo 2019. Phoenix, Arizona.
  • Barsotti, M., Jones, C., Hadjioannou, M., Puryear, J. (2018) “Engineered Material Arresting System and Methods for Forming Same.” United States Patent 2018/0251233 A1.
  • Barsotti, M., Rasico, J., O’Hare, E., Sammarco, E., Gerst, D., Newman, C. (2017) “Accurate Land Mine Modeling Using FEM & SPH with Modified Smoothing Length.” Proceedings of Ground Vehicle Systems Engineering and Technology Symposium. Novi, MI.
  • Bewick, B., Rolater, G., Bui, J., Barsotti, M., Ziemba, A., Sanai, M., Laney, C. (2017) “Fragmentation of Solid Materials Using Shock Tube, Part 1: First Test Series in a Small-Diameter Shock Tube,” Defense Threat Reduction Agency, Report DTRA-TR-17-21. Fort Belvoir, VA, 2017.
  • Barsotti, M., Sammarco, E., Stevens, D. (2016) “Comparison of Strategies for Landmine Modeling in LS-DYNA with Sandy Soil Material Model Development.” Proceedings from 14th International LS-DYNA User’s Conference.
  • Stevens, D., Barsotti, M. (2016) “Modeling of Landmine Loading of Armored Vehicles and Extension to Field Testing Assessment.” Proceedings from Ground Vehicle Systems Engineering and Technology Symposium. Novi, MI.
  • Hadjioannou, M., Stevens, D., Barsotti, M. (2016) “Development and Validation of Bolted Connection Modeling in LS-DYNA for Large Vehicle Models.” Proceedings from 14th International LS-DYNA Users Conference. Detroit, MI.
  • Bewick, B., Barsotti, M., Marchand, K., Sanai, M., Ziemba, A. (2015) “Fragmentation Due to Overloaded Construction Facades.” Proceedings of the 3rd International Conference on Protective Structures. Newcastle, Australia.
  • Puryear, J., Barsotti, M., Stevens, D., Williamson, E., Sammarco, E., Chiarito, V. (2013) “Modeling of Blast-Loaded Steel Cables.” Proceedings of the 15th International Symposium for the Interaction of Munitions with Structures. Potsdam, Germany.
  • Barsotti, M., Puryear, J., Stevens, D., Alberson, R., McMahon, P. (2012) “Modeling Mine Blast with SPH.” Proceedings of the 12th International LS-DYNA Users Conference. Detroit, MI.
  • Barsotti, M. (2011) “Comparison of FEM and SPH for Modeling a Crushable Foam Aircraft Arrestor Bed.” Proceedings of the 11th International LS-DYNA Users Conference. Detroit, MI.
  • Barsotti, M., Puryear, J., Stevens, D. (2009). “ACRP Report 29: Developing Improved Civil Aircraft Arresting Systems.” Transportation Research Board of the National Academies. Washington, DC.
  • Barsotti, M. (2008). “Optimization of a Passive Aircraft arrestor with a Depth-Varying Crushable Material Using a Smoothed Particle Hydrodynamics (SPH) Model.” Thesis at University of Texas, San Antonio, Published by ProQuest.
  • Ammerman, D., Stevens, D., Barsotti, M. (2005) “Numerical Analyses of Locomotive Impacts on a Spent Fuel Truck Cask and Trailer.” Proceedings from ASME 2005 Pressure Vessels and Piping Conference. Denver, CO.