Introduction
Base-isolated building with large-mass ratio TMD at basement
Base-isolated building without TMD
Conventional base-isolated building with large-mass ratio TMD
Base-isolated building with large-mass ratio TMD at basement using inertial mass damper for stroke reduction
Determination of stiffness and damping coefficient of TMD
Response reduction performance of proposed system for simple base-isolated building and conventional base-isolation-TMD hybrid system
Simulated long-period ground motion and simulated pulse-type ground motion
Response reduction performance of proposed system for simple base-isolated building
Response reduction performance of proposed system for conventional base-isolation-TMD hybrid system
Influence of rail friction on response of proposed system
Reduction of TMD stroke using various methods
Proposed-1 Model as basic model | Proposed-1-1 Model (detuning) | Proposed-1-2 Model (increased damping) | Proposed-1-3 Model (increased TMD mass-ratio) | Proposed-2 Model (with inertial mass damper) | Imass TMD Model (conventional model with inertial mass damper) | |
---|---|---|---|---|---|---|
TMD mass-ratio μ
| 10 % | 10 % | 10 % | 26.7 % | 10 % | 10 % |
Inertial mass damper ratio η
s
| – | – | – | – | 0.06 | 0.08685 |
TMD damping ratio h
2
| 0.3 | 0.3 | 0.535 | 0.3 | 0.3 | 0.3 |
Tuning ratio γ
| 0.8780 | 1.2430 | 0.7540 | 0.7880 | 0.8850 | 0.8950 |
Proposed-1-1 Model | Proposed-1-2 Model | Proposed-1-3 Model | Proposed-2 Model | Imass TMD Model | NewTMD Model | |
---|---|---|---|---|---|---|
Long-period ground motion | ||||||
Deformation of base-isolation story | × | △ | ◎ | △ | ◎ | 〇 |
Top-floor absolute acceleration | × | △ | ◎ | △ | ◎ | • |
Deformation of superstructure | × | △ | ◎ | △ | ◎ | • |
TMD stroke | Similar reduction from Proposed-1 Model | |||||
TMD displacement relative to ground | × | ◎ | 〇 | 〇 | ◎ | ◎ |
Reaction of spring supporting TMD | × | ◎ | × | △ | × | △ |
Reaction of oil damper supporting TMD | • | △ | × | △ | × | △ |
Reaction of inertial mass damper supporting TMD | – | – | – | ◎ | × | – |
Pulse-type ground motion | ||||||
Deformation of base-isolation story | • | • | • | • | • | • |
Top-floor absolute acceleration | • | • | • | • | • | • |
Deformation of superstructure | • | • | • | • | • | • |
TMD stroke | ◎ | 〇 | • | ◎ | • | 〇 |
TMD displacement relative to ground | • | • | • | 〇 | ◎ | 〇 |
Reaction of spring supporting TMD | △ | ◎ | × | • | △ | △ |
Reaction of oil damper supporting TMD | △ | △ | × | • | × | × |
Reaction of inertial mass damper supporting TMD | – | – | – | ◎ | × | – |