Use of the active member concept in vibration mitigation of seismic structures

L. Y. Lu, J. J. Bain, L. L. Chung

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This paper aims to investigate the possible use of a control system that combines the concept of active members and a direct output feedback method to mitigate the seismic vibration of civil engineering structural systems. An active member, according to the definition used in this paper, is an added structural member in which an actuator, a sensor and a simple controller are highly integrated. By integrating these fundamental control devices together, the active members will be less vulnerable to environmental influence; moreover, each active member can be used as an independent control mechanism. In this study, an output feedback control algorithm called the Modal Truncated Output Feedback (MTOF), suitable for the active member control, is adopted. With this algorithm, the failure or malfunction of one active member will not impair the entire control system. A numerical example of the shear building type is used to demonstrate the proposed control system. It is shown that the concept of active members and the MTOF control algorithm together form a very stable, effective, and reliable control system for vibration control of seismic structures.

Original languageEnglish
Pages (from-to)341-351
Number of pages11
JournalEngineering Structures
Issue number4
Publication statusPublished - 1999 Apr

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering


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