Research
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Main Research
Directions: (1) fluid-structure-soil
interaction, (2) wave propagation, (3) earthquake engineering, (4) structural
dynamics, and (5) applied mechanics.
Problems: (1) nonlinear analysis of fluid-structure-soil interaction (compressible fluid and elastic/poroelastic soil), (2) dynamic analysis of fixed/floating offshore structures, (3) dynamic analysis of nuclear facilities, liquid storage tanks, concrete gravity dams, long-span bridges, and high-rise buildings, (4) dynamic analysis of high-speed railway systems, (5) nonlinear analysis of wave propagation in an elastic/poroelastic layered half-space and (6) development and improvement of seismic design codes in Korea.
Methodology: (1) theoretical/numerical approach based on finite element methods, consistent transmitting boundaries, high-order absorbing boundary conditions (continued-fraction absorbing boundary conditions or perfectly matched discrete layers), perfectly matched layers, thin-layer methods, and boundary element methods and (2) experimental approach based on shake table tests and field measurements.