Abstract
This paper gives a survey of the original concept of incorporation of 'artificial nonlinearity' or 'artificially added nonlinearity' into structural control schemes aiming at reducing seismic response of structures, and then presents the significance of 'artificial nonlinearity' integrated into semiactive control schemes. The original concept, which covers the basic philosophy from passive type to active type of control, was proposed about 50 years ago. The recent development of control schemes based upon hysteretic energy dissipation is actually the realization of such a concept with the background of modern technologies. Compared with today's base isolation scheme, the significance of 'artificial nonlinearity' is discussed. Then, with main focus on semiactive control schemes, the effectiveness and significance of artificial nonlinearity are presented along with the philosophy of autonomous-decentralization. After demonstrating how the seismic responses depend upon the resulting ductility factors of bilinear hysteresis, the effect and significance of a controllable damper with variable slip-force levels are demonstrated.
| Original language | English |
|---|---|
| Pages (from-to) | 17-31 |
| Number of pages | 15 |
| Journal | Structural Control and Health Monitoring |
| Volume | 16 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Feb |
Fingerprint
Keywords
- Artificial nonlinearity
- Autonomous-decentralized control
- Base isolation
- Ductility factor
- Passive control
- Semiactive control
- Slip-force level
- Structural control
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
Cite this
Artificial nonlinearity in structural control : Its original concept survey and significance in semiactive control scheme. / Nishitani, Akira; Nitta, Yoshihiro; Wakahara, Chihiro.
In: Structural Control and Health Monitoring, Vol. 16, No. 1, 02.2009, p. 17-31.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Artificial nonlinearity in structural control
T2 - Its original concept survey and significance in semiactive control scheme
AU - Nishitani, Akira
AU - Nitta, Yoshihiro
AU - Wakahara, Chihiro
PY - 2009/2
Y1 - 2009/2
N2 - This paper gives a survey of the original concept of incorporation of 'artificial nonlinearity' or 'artificially added nonlinearity' into structural control schemes aiming at reducing seismic response of structures, and then presents the significance of 'artificial nonlinearity' integrated into semiactive control schemes. The original concept, which covers the basic philosophy from passive type to active type of control, was proposed about 50 years ago. The recent development of control schemes based upon hysteretic energy dissipation is actually the realization of such a concept with the background of modern technologies. Compared with today's base isolation scheme, the significance of 'artificial nonlinearity' is discussed. Then, with main focus on semiactive control schemes, the effectiveness and significance of artificial nonlinearity are presented along with the philosophy of autonomous-decentralization. After demonstrating how the seismic responses depend upon the resulting ductility factors of bilinear hysteresis, the effect and significance of a controllable damper with variable slip-force levels are demonstrated.
AB - This paper gives a survey of the original concept of incorporation of 'artificial nonlinearity' or 'artificially added nonlinearity' into structural control schemes aiming at reducing seismic response of structures, and then presents the significance of 'artificial nonlinearity' integrated into semiactive control schemes. The original concept, which covers the basic philosophy from passive type to active type of control, was proposed about 50 years ago. The recent development of control schemes based upon hysteretic energy dissipation is actually the realization of such a concept with the background of modern technologies. Compared with today's base isolation scheme, the significance of 'artificial nonlinearity' is discussed. Then, with main focus on semiactive control schemes, the effectiveness and significance of artificial nonlinearity are presented along with the philosophy of autonomous-decentralization. After demonstrating how the seismic responses depend upon the resulting ductility factors of bilinear hysteresis, the effect and significance of a controllable damper with variable slip-force levels are demonstrated.
KW - Artificial nonlinearity
KW - Autonomous-decentralized control
KW - Base isolation
KW - Ductility factor
KW - Passive control
KW - Semiactive control
KW - Slip-force level
KW - Structural control
UR - http://www.scopus.com/inward/record.url?scp=59349092125&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=59349092125&partnerID=8YFLogxK
U2 - 10.1002/stc.307
DO - 10.1002/stc.307
M3 - Article
VL - 16
SP - 17
EP - 31
JO - Structural Control and Health Monitoring
JF - Structural Control and Health Monitoring
SN - 1545-2255
IS - 1
ER -