Semi-Active leverage-Type isolation system considering minimum structural energy

Tzu Kang Lin, Lyan-Ywan Lu, Chi Jen Chen

Research output: Contribution to journalArticle

Abstract

Semi-Active isolation systems based on leverage-Type stiffness control strategies have been widely studied. The main concept behind this type of system is to adjust the stiffness in the isolator to match the fundamental period of the isolated system by using a simple leverage mechanism. Although this system achieves high performance under far-field earthquakes, it is unsuitable for near-fault strong ground motion. To overcome this problem, this study considers the potential energy effect in the control law of the semi-Active isolation system. The minimal energy weighting (MEW) between the potential energy and kinetic energy was first optimized through a series of numerical simulations. Two MEW algorithms, namely generic and near-fault MEW control, were then developed to efficiently reduce the structural displacement responses. To demonstrate the performance of the proposed method, a two-degree-of-freedom structure was employed as a benchmark. Numerical results indicate that the dynamic response of the structure can be effectively dampened by the proposed MEW control under both far-field and near-fault earthquakes, whereas the structural responses resulting from conventional control methods may be greater than those for the purely passive control method. Moreover, according to experimental verifications, both the generic and near-fault MEW control modes yielded promising results under impulse-like earthquakes. The practicability of the proposed control algorithm was verified.

Original languageEnglish
Pages (from-to)373-387
Number of pages15
JournalSmart Structures and Systems
Volume21
Issue number3
DOIs
Publication statusPublished - 2018 Mar 1

Fingerprint

Power control
Earthquakes
Potential energy
Stiffness
Kinetic energy
Dynamic response
Computer simulation

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

@article{6fd6ffc630734b8f8ca6bab3a9309b41,
title = "Semi-Active leverage-Type isolation system considering minimum structural energy",
abstract = "Semi-Active isolation systems based on leverage-Type stiffness control strategies have been widely studied. The main concept behind this type of system is to adjust the stiffness in the isolator to match the fundamental period of the isolated system by using a simple leverage mechanism. Although this system achieves high performance under far-field earthquakes, it is unsuitable for near-fault strong ground motion. To overcome this problem, this study considers the potential energy effect in the control law of the semi-Active isolation system. The minimal energy weighting (MEW) between the potential energy and kinetic energy was first optimized through a series of numerical simulations. Two MEW algorithms, namely generic and near-fault MEW control, were then developed to efficiently reduce the structural displacement responses. To demonstrate the performance of the proposed method, a two-degree-of-freedom structure was employed as a benchmark. Numerical results indicate that the dynamic response of the structure can be effectively dampened by the proposed MEW control under both far-field and near-fault earthquakes, whereas the structural responses resulting from conventional control methods may be greater than those for the purely passive control method. Moreover, according to experimental verifications, both the generic and near-fault MEW control modes yielded promising results under impulse-like earthquakes. The practicability of the proposed control algorithm was verified.",
author = "Lin, {Tzu Kang} and Lyan-Ywan Lu and Chen, {Chi Jen}",
year = "2018",
month = "3",
day = "1",
doi = "10.12989/sss.2018.21.3.373",
language = "English",
volume = "21",
pages = "373--387",
journal = "Smart Structures and Systems",
issn = "1738-1584",
publisher = "Techno Press",
number = "3",

}

Semi-Active leverage-Type isolation system considering minimum structural energy. / Lin, Tzu Kang; Lu, Lyan-Ywan; Chen, Chi Jen.

In: Smart Structures and Systems, Vol. 21, No. 3, 01.03.2018, p. 373-387.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Semi-Active leverage-Type isolation system considering minimum structural energy

AU - Lin, Tzu Kang

AU - Lu, Lyan-Ywan

AU - Chen, Chi Jen

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Semi-Active isolation systems based on leverage-Type stiffness control strategies have been widely studied. The main concept behind this type of system is to adjust the stiffness in the isolator to match the fundamental period of the isolated system by using a simple leverage mechanism. Although this system achieves high performance under far-field earthquakes, it is unsuitable for near-fault strong ground motion. To overcome this problem, this study considers the potential energy effect in the control law of the semi-Active isolation system. The minimal energy weighting (MEW) between the potential energy and kinetic energy was first optimized through a series of numerical simulations. Two MEW algorithms, namely generic and near-fault MEW control, were then developed to efficiently reduce the structural displacement responses. To demonstrate the performance of the proposed method, a two-degree-of-freedom structure was employed as a benchmark. Numerical results indicate that the dynamic response of the structure can be effectively dampened by the proposed MEW control under both far-field and near-fault earthquakes, whereas the structural responses resulting from conventional control methods may be greater than those for the purely passive control method. Moreover, according to experimental verifications, both the generic and near-fault MEW control modes yielded promising results under impulse-like earthquakes. The practicability of the proposed control algorithm was verified.

AB - Semi-Active isolation systems based on leverage-Type stiffness control strategies have been widely studied. The main concept behind this type of system is to adjust the stiffness in the isolator to match the fundamental period of the isolated system by using a simple leverage mechanism. Although this system achieves high performance under far-field earthquakes, it is unsuitable for near-fault strong ground motion. To overcome this problem, this study considers the potential energy effect in the control law of the semi-Active isolation system. The minimal energy weighting (MEW) between the potential energy and kinetic energy was first optimized through a series of numerical simulations. Two MEW algorithms, namely generic and near-fault MEW control, were then developed to efficiently reduce the structural displacement responses. To demonstrate the performance of the proposed method, a two-degree-of-freedom structure was employed as a benchmark. Numerical results indicate that the dynamic response of the structure can be effectively dampened by the proposed MEW control under both far-field and near-fault earthquakes, whereas the structural responses resulting from conventional control methods may be greater than those for the purely passive control method. Moreover, according to experimental verifications, both the generic and near-fault MEW control modes yielded promising results under impulse-like earthquakes. The practicability of the proposed control algorithm was verified.

UR - http://www.scopus.com/inward/record.url?scp=85049655891&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85049655891&partnerID=8YFLogxK

U2 - 10.12989/sss.2018.21.3.373

DO - 10.12989/sss.2018.21.3.373

M3 - Article

AN - SCOPUS:85049655891

VL - 21

SP - 373

EP - 387

JO - Smart Structures and Systems

JF - Smart Structures and Systems

SN - 1738-1584

IS - 3

ER -