Dr. Choi is a senior engineer with over 10 years of experience in both experimental and analytical structural dynamics and system identifications, including blast effects on structures. He has substantial experience with the design and analysis of numerous steel frame structures, focusing on the reduction of their potential for progressive collapse. He has authored several papers that discuss the progressive collapse of buildings.

Mr. Dunn has been with Karagozian & Case since May 1988. He has designed commercial, industrial, and hospital structures as well as structures to resist conventional and nuclear weapons effects. Mr. Dunn has performed a variety of blast effects analyses for airports, office buildings, and embassies. He is familiar with the diverse number of software tools used to make assessments and the various government guidelines related to performing progressive collapse analyses. He is skilled at using a variety of three-dimensional, linear/nonlinear finite element codes for the computing of building responses, including static frame analyses, earthquake response-spectrum analyses, and frequency domain analyses. Mr. Dunn holds professional licenses in California, New Mexico, Virginia, New York, Maryland, Pennsylvania, New Jersey, and Washington, D.C.

Dr. Lan has 20 years of experience in structural engineering, focusing on finite element and boundary element analyses of engineering structures under static, dynamic, and blast loads. He has designed a large number of proof-of-concept structural test articles, directed the full-scale blast testing of these test articles, and followed with comprehensive posttest analysis. He was awarded the prestigious Defense Technology Prize by the Ministry of Defense, Singapore, and has published over 30 papers and reports related to structural engineering and blast effects.

Mr. Magallanes has performed numerous blast effects analyses and blast-resistant design work for test-planning and prediction projects as well as anti-terrorism work at international airports and government facilities. He has used various simplified predictive damage codes and methods along with military technical manuals to analyze and design specialized structural elements and systems, new hardened military facilities, and conventional/industrial structures for service loads and blast/impact resistance. He has significant experience in planning, generating and executing a variety of three-dimensional implicit and explicit nonlinear dynamic analyses of varying levels of complexity with numerous HFPB codes (ADINA, LS-DYNA and DYNA3D) for shock, impact, blast effects, and seismic ground motions. Mr. Magallanes is professionally licensed in California.

Mr. Martinez is extensively involved in the design, construction, and explosive testing of full- and sub-scale test articles. His capabilities include the design and analysis of steel and reinforced concrete structures that are subjected to dynamic loads; specifically, blast overpressure loadings. He assists in the installation of data acquisition systems, installation of various dynamic measuring devices, and is responsible for the collection, reduction, interpretation, and presentation of experimental data. In addition, Mr. Martinez is proficient in the use of blast codes such as ConWep and BlastX (which are used to predict internal and external blast overpressure loadings on structures and structural elements) and structural response codes, such as BlastPRO and SOLVER. He is also familiar with special materials such as Kevlar®, carbon fiber and glass composites, and polymer linings as they apply to blast mitigation.

Dr. Xin has extensive experience with calculations using nonlinear finite element codes such as DYNA3D, LS-DYNA, and AUTODYN. His projects have involved blast effects on reinforced concrete columns, reinforced concrete walls, and CMU walls. He has also performed calculations involving munition fragment effects as well as blast pressures on structural elements. Most recently, he has performed a suite of finite element calculations to predict the response of concrete columns under combined axial and weapon-induced loads in support of fast-running model generation.