|
Hokkaido University Collection of Scholarly and Academic Papers >
Theses >
博士 （工学） >
Seismic response control of coupled structures using passive negative stiffness connection
|
Files in This Item:
|
|
|
Related Items in HUSCAP:
|
| Title: | Seismic response control of coupled structures using passive negative stiffness connection |
| Other Titles: | パッシブ負剛性接続を使用した連結構造物の地震応答制御 |
| Authors: | Longjam, Sonia Browse this author |
| Issue Date: | 26-Sep-2022 |
| Publisher: | Hokkaido University |
| Abstract: | Coupled vibration control (CVC) system is a promising method formed by linking two or more adjacent buildings with a connecting mechanism to reduce the response under dynamic excitations such as earthquakes. A spring and/or a damping element as vibration controllers connecting a mainframe and a subframe represent a typical passive CVC system. Over the last years, a number of control techniques have been proposed for the structural protection of CVC systems against earthquakes. The control techniques include passive, active, and semiactive control strategies. Various vibration control devices, primarily energy dissipators, have been proposed and practically applied to reduce the CVC systems' seismic response. Negative stiffness, which exerts an opposing restoring force when the displacement increases, is considered a potential vibration control technique for structures. In the past decades, rapid progress has been made in researching and developing negative stiffness devices (NSDs) incorporated into individual buildings. However, research on the incorporation of NSDs into CVC structures is very limited and remains challenging, despite the increasing applications of coupled building control. There has been limited research on assessing the seismic control effectiveness of a passive or active negative stiffness as a connecting controller for CVC systems. This thesis explores the behaviour and control efficiency of a passive NSD (PNSD) to improve the seismic resistance of coupled buildings. PNSD as a connecting element is installed between the mainframe and subframe, forming the CVC system. This work highlights four objectives to accomplish the aim: (1) to investigate the behaviour of PNSD as the vibration control device and optimal tuning of the CVC structures; (2) to examine the linear and nonlinear numerical response of adjacent single degree of freedom (SDOF) structures connected by PNSD; (3) to figure out the control performance of PNSD on multi degrees of freedom (MDOF) CVC systems; (4) to validate the analytical and numerical investigation of the effective control technique of PNSD on CVC system through experiments. In this dissertation, the optimal parameters to effectively reduce the seismic response of the CVC systems were established. The numerical investigation of the CVC system incorporated with PNSD was verified with the experimental data. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第15188号 |
| Degree Level: | 博士 |
| Degree Discipline: | 工学 |
| Examination Committee Members: | (主査) 准教授 白井 和貴, 教授 岡崎 太一郎, 教授 蟹江 俊仁 |
| Degree Affiliation: | 工学院(建築都市空間デザイン専攻) |
| (Relation)haspart: | Longjam S, Shirai K (2022) Numerical investigation of earthquake response reduction effects by negative stiffness connection for adjacent building structures. Structures, Vol. 38, 672-688. |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/90545 |
| Appears in Collections: | 課程博士 (Doctorate by way of Advanced Course) > 工学院(Graduate School of Engineering)
学位論文 (Theses) > 博士 （工学）
|
|
