A5033488863- Vibration Control and Rheological Fluids
- Seismic Performance and Analysis
- Structural Health Monitoring Techniques
- Hydraulic and Pneumatic Systems
- Rocket and propulsion systems research
- Vibration and Dynamic Analysis
- Spacecraft and Cryogenic Technologies
- Structural Engineering and Vibration Analysis
- Geophysics and Sensor Technology
- Energetic Materials and Combustion
- Elevator Systems and Control
- Seismic Imaging and Inversion Techniques
- Structural Load-Bearing Analysis
- Geotechnical Engineering and Soil Stabilization
- Speech and Audio Processing
- Magnetic and transport properties of perovskites and related materials
- Geotechnical Engineering and Underground Structures
- Railway Engineering and Dynamics
- Advanced Fiber Optic Sensors
- Microstructure and mechanical properties
- Acoustic Wave Resonator Technologies
- Shape Memory Alloy Transformations
- Physics of Superconductivity and Magnetism
- Civil and Geotechnical Engineering Research
- Elasticity and Material Modeling
Hong Kong Polytechnic University
2023-2024
Tohoku University
2021-2024
Compared with conventional linear viscous damping (LVD), rate‐independent (RILD) mitigates floor response acceleration in low‐frequency structures more effectively without compromising the control performance of displacement responses during long‐period or earthquakes. Although theoretical and experimental attempts have been made to overcome noncausality RILD devices realize using passive semiactive devices, only a few studies highlighted impulse‐response precursor modal analysis method...
In the 2011 Great East Japan Earthquake, low-frequency components of ground motion brought long-duration shaking to high-rise buildings in mega-cities far from epicenter, resulting damage their interior and exterior walls, unsafe conditions for building occupants. Rate-independent linear damping (RILD) has been suggested as a viable option simultaneously reducing excessive displacement floor response acceleration structure. While majority previous studies on RILD have mainly focused...
The past two decades have witnessed the adverse effects of low-frequency components severe earthquakes in structures. development displacement control technologies for seismic protection structures has been identified as a growing challenge earthquake engineering. Related studies suggested that rate-independent linear damping (RILD) could be viable option reducing excessive displacements However, previous on RILD systems not extensively investigated their input energy during an earthquake....
Damage to nonstructural components or excessive displacements in low-frequency structures caused by recent major earthquakes, such as the 2011 Great East Japan Earthquake, highlighted need protect these against earthquake-induced damage. Rate-independent linear damping (RILD) has been found be a viable option for reducing displacement of because its control force is larger region than that conventional elements. Most studies on RILD have focused theoretical and mathematical aspects rather...
The first two decades of the 21st century witnessed adverse effects induced by low-frequency components severe earthquakes in structures. In 2011 Great East Japan Earthquake, it was reported that many high-rise buildings suffered long-duration vibration with excessive displacements, resulting damaged interior and exterior walls. Thus, development displacement control technologies for seismic protection structures has been identified as a growing challenge field earthquake engineering....
When rate-independent linear damping (RILD) is incorporated into a base-isolated structure, it achieves similar response displacement reduction effect with significantly lower floor acceleration compared viscous (LVD) the same loss factor. To address undesirable stiffness added to an isolation layer when we adopt mechanical device comprising few branches of spring–dashpot link realize RILD, this study proposes canceling isolator by adding inerter element and reducing stiffness. A heuristic...
Rate-independent linear damping benefits low-frequency structures by mitigating excessive displacement without increasing the floor acceleration response under severe ground motions. The advantage of rate-independent in controlling is attributed to its constant loss stiffness, which ensures high components while maintaining low high-frequency forces. In this study, a modal decomposition method was developed for base-isolated structure containing distributed non-proportionally stiffness....
The investigation of GdBaCo2O5+δ system using low frequency internal friction method indicates that there exists a relaxation peak originated from the jump excess oxygen atoms. content δ affects greatly height, shape and position peaks, which reflects state varying with value δ. When is very small, say for sample δ=0.005, corresponding disappears. On increasing will be observed. Three different states can concluded peaks exist in samples δ=0.278,0.407,0.421,0.431 0.515. In addition, an...
The moment and rotation curve (M-θ curve) of beam-column connection was described by three-parameters power model, but the shape coefficient ( n ) in model rarely studied. Eight top seat angle connections selected to analysis with Ansys10.0, based on which fit for structural . results were testified valid test data got others curves. suggested value numerical method these research indicated that curves is fitted FEA perfectly, those have small difference. By contrast initial stiffness...
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