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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


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",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%T On modal energy in civil structural control
%A Miao PANG
%A Tie-jiong LOU
%A Ming ZHAO
%J Journal of Zhejiang University SCIENCE A
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%D 2008
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0720055

T1 - On modal energy in civil structural control
A1 - Miao PANG
A1 - Tie-jiong LOU
A1 - Ming ZHAO
J0 - Journal of Zhejiang University Science A
VL - 9
IS - 7
SP - 878
EP - 887
%@ 1673-565X
Y1 - 2008
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A0720055

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


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