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Received: 2007-11-13

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.7 P.878~887

10.1631/jzus.A0720055


On modal energy in civil structural control


Author(s):  Miao PANG, Tie-jiong LOU, Ming ZHAO

Affiliation(s):  Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   pm@zju.edu.cn, tjlou@zju.edu.cn

Key Words:  Modal energy, Aseismic control, LQR (linear quadratic regulator) control algorithm, Modal space, Generalized single-degree-of-freedom (SDOF) system


Miao PANG, Tie-jiong LOU, Ming ZHAO. On modal energy in civil structural control[J]. Journal of Zhejiang University Science A, 2008, 9(7): 878~887.

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author="Miao PANG, Tie-jiong LOU, Ming ZHAO",
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T1 - On modal energy in civil structural control
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J0 - Journal of Zhejiang University Science A
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SP - 878
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0720055


Abstract: 
A new control strategy based on modal energy criterion is proposed to demonstrate the effectiveness of the control system in reducing structural earthquake responses. The modal control algorithm combining LQR (linear quadratic regulator) control algorithm is adopted in the discrete time-history analysis. The various modal energy forms are derived by definition of the generalized absolute displacement vector. A preliminary numerical study of the effectiveness of this control strategy is carried out on a 20-storey framed steel structural model. The controlled performance of the model is studied from the perspectives of both response and modal energy. Results show that the modal energy-based control strategy is very effective in reducing structural responses as well as in consuming a large amount of modal energy, while augmentation of additional generalized control force corresponding to the modes that contain little modal energy is unnecessary, as it does little help to improve the controlled structural performance.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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