A5050478500- Structural Health Monitoring Techniques
- Fluid Dynamics Simulations and Interactions
- Probabilistic and Robust Engineering Design
- Geotechnical Engineering and Underground Structures
- Structural Response to Dynamic Loads
- Vibration and Dynamic Analysis
- Structural Engineering and Vibration Analysis
- Ultrasonics and Acoustic Wave Propagation
- Wave and Wind Energy Systems
- Railway Engineering and Dynamics
- Seismic Performance and Analysis
- Structural Behavior of Reinforced Concrete
- Structural Load-Bearing Analysis
- Structural Integrity and Reliability Analysis
- High-Velocity Impact and Material Behavior
- Structural Analysis and Optimization
- Optical measurement and interference techniques
- Infrastructure Maintenance and Monitoring
- Lattice Boltzmann Simulation Studies
- Fire effects on concrete materials
- Numerical methods in engineering
- Offshore Engineering and Technologies
- Fluid Dynamics and Heat Transfer
- Fluid Dynamics and Vibration Analysis
- Composite Structure Analysis and Optimization
National University of Singapore
2014-2024
Seoul National University of Science and Technology
2015
Nanjing Tech University
2015
Kyoto University
2013
Kyoto Architecture University
2013
University of Plymouth
2006
American Society of Civil Engineers
2000
Marymount University
1989-1999
University of California, Berkeley
1989
Abstract The concept of fractional derivatives is employed in the formulation a stress‐strain relationship for elastomers. An oscillator consisting mass and ‘fractional’ Kelvin element used to model elastomeric bearings base isolation systems. Efficient numerical multi‐step schemes are developed dynamic analysis single‐degree‐of‐freedom ‘fractional oscillator’ time domain. Numerical examples show that these good agreement with Laplace Fourier solutions. When applied shaking table tests...
Abstract A substructure approach is used to estimate the stiffness and damping coefficients of structures from measurement dynamic responses. The are decomposed into smaller subsystems for which state observation equations formulated solved by method extended Kalman filter with a weighted global iteration algorithm. Substructural identification methods without overlapping members proposed. In both methods, convergence structural parameters optimal values improved significantly less...
Abstract This paper presents a new approach, called the moving element method, for dynamic analysis of train‐track systems. By discretizing rail beam on viscoelastic foundation into elements that ‘flow’ with vehicle, proposed method eliminates need keeping track vehicle position respect to model. The governing equations are formulated in co‐ordinate system travelling at constant velocity, and class conceptual (as opposed physical elements) derived beams. In numerical study, four cases...
SUMMARY A new Lagrangian particle method called the consistent (CPM), which solves Navier–Stokes equations in a semi‐implicit time stepping scheme, is proposed this paper. Instead of using kernel function as some methods, partial differential operators are approximated way with Taylor series expansion. boundary recognition applied to help define changing liquid domain. The incompressibility condition free surface particles enforced by an adjustment scheme. With these improvements, CPM shown...
The unavoidable increase in train speed and load, as well the aging of railway facilities, is requiring more attention to rail defects detection. As a promising tool for rail, in-service high-speed inspection, guided wave–based detection technologies have been developed succession by researches past two decades. However, there lack systematic review on developments performances these technologies. This article reviews ultrasonic inspection methods comprehensively with focus state-of-the-art...
Substructural identification provides a novel means by which to reduce large problem smaller problems of manageable size, thereby improving numerical convergence and accuracy. Various methods proposed several researchers thus far require interface response measurements, are then treated as input the substructures concern. In practice, however, it is not always possible obtain particularly if rotational required for beam/frame structures. this paper, method parameter without need measurements...
Abstract This paper presents a study on the behaviour of rectangular liquid dampers under horizontal excitation arbitrary time history. The theoretical model to predict motion shallow in tank is adapted from previous researchers' which was developed for sinusoidal excitations. includes an energy dissipation term arising viscosity. In present consideration excitations, derived straightforward way, without resorting equivalent linearization method or assumption harmonic response as used by...
In the application of system identification to a structural system, unknown parameters are determined based on numerical analysis input and output measurements. The accuracy an identified parameter its uncertainty both depend method, measurement noise modeling error. Most studies, however, identify means without addressing issue uncertainties. Presented in this paper is improved version commonly used extended Kalman filter (EKF) by incorporating adaptive procedure. covariance updated time...
Identification of damage structures has recently received considerable attention in the light maintenance and retrofitting existing under service loads after natural disasters. In this respect, most previous system-identification studies considered structural models typically with not more than three degrees freedom. Although many these identification methods should work principle, local detection real remains an arduous task for reasons such as insensitivity modal frequencies to changes,...
For structural health monitoring it is impractical to identify a large structure with complete measurement due limited number of sensors and difficulty in field instrumentation. Furthermore, not desirable unknown parameters full system because numerical convergence. A novel substructural strategy was presented for identification stiffness matrices damage assessment incomplete measurement. The approach employed systems divide-and-conquer manner. In addition, the concept model condensation...