Semiactive Control of Nonlinear Isolated Bridges with Time Delay
Publication: Journal of Structural Engineering
Volume 133, Issue 2
Abstract
The effectiveness of semiactive control using variable dampers is studied for nonlinear isolated bridges, which exhibit inelastic response at both the columns and the isolators, under near-field ground motions. The linear quadratic regulator optimal control algorithm is used to command variable dampers. Time delay is inevitable in the operation of control systems and may deteriorate the control performance. A time-delay compensation method based on the Newmark’s method is proposed to mitigate the degradation of control performance due to time delay. A five-span viaduct with high-damping-rubber isolators is utilized for analysis. The results show that semiactive control with variable dampers is effective in reducing the seismic response and provides the similar performance by linear quadratic regulator active control. The semiactive control also shows similar or better performance than the passive control with the maximum damping coefficient of the variable damper. The proposed Newmark compensation method shows superior compensation performance on the time-delayed nonlinear system under semiactive control.
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Acknowledgments
The writers acknowledge the support for the first writer during the doctoral study from the Center for Urban Earthquake Engineering in Tokyo Institute of Technology, Tokyo, Japan.
References
Abdel-Mooty, M., and Roorda, J. (1991). “Time-delay compensation in active damping of structures.” J. Eng. Mech., 117(11), 2549–2570.
Agrawal, A. K., and Yang, J. N. (2000). “Compensation of time-delay for control civil engineering structures.” Earthquake Eng. Struct. Dyn., 29(1), 37–62.
Erkus, B., Abe, M., and Fujino, Y. (2002). “Investigation of semi-active control for seismic protection of elevated highway bridges.” Eng. Struct., 24, 281–293.
Japan Road Association. (1996). Design specifications of highway bridges, Part V seismic design, Maruze, Tokyo.
Kawashima, K., and Unjoh, S. (1994). “Seismic response control of bridges by variable dampers.” J. Struct. Eng., 120(9), 2583–2601.
Kurata, F., Kobori, T., Takahashi, M., Niwa, N., and Midorikawa, H. (1999). “Actual seismic response controlled building with semi-active damper system.” Earthquake Eng. Struct. Dyn., 28(11), 1427–1447.
Lee, T. Y., and Kawashima, K. (2006). “Effectiveness of seismic displacement response control for nonlinear isolated bridge.” J. Struct. Mech. Earthquake Eng., JSCE, 808/I-74, 1–15.
Loh, C. H., Wu, L. Y., and Lin, P. Y. (2003). “Displacement control of isolated structures with semi-active control devices.” J. Struct. Control, 10, 77–100.
McGreevy, S., Soong, T. T., and Reinhorn, A. M. (1988). “An experimental study of time delay compensation in active structural control.” Proc., of the SEM 6th Int. Modal Analysis Conf., Orlando, Fla., 733–739.
Priestley, M. J. N., Seible, F., and Calvi, G. M. (1996). Seismic design and retrofit of bridges, Wiley, New York.
Soong, T. T. (1990). Active structural control: Theory and practice, Longman, U.K.
Spencer, B. F., and Nagarajaiah, S. (2003). “State-of-the-art of structural control.” J. Struct. Eng., 129(7), 845–856.
Symans, M. D., and Constantinou, M. C. (1995). “Development and experimental study of semi-active fluid damping devices for seismic protection of structures.” Technical Rep. NCEER-95-11, National Center for Earthquake Engineering Research, Buffalo, N.Y.
Symans, M. D., and Constantinou, M. C. (1997). “Seismic testing of a building structure with a semi-active fluid damper control system.” Earthquake Eng. Struct. Dyn., 26(7), 759–777.
Symans, M. D., and Kelly, S. W. (1999). “Fuzzy logic control of bridge structures using intelligent semi-active seismic isolation systems.” Earthquake Eng. Struct. Dyn., 28(1), 37–60.
Wen, Y. K. (1976). “Method for random vibration of hysteretic system.” J. Engrg. Mech. Div., 102(2), 249–263.
Yang, J. N., Li, Z., and Vongchavalitkul, S. (1992). “A generalization of optimal control theory: Linear and nonlinear control.” Technical Rep. NCEER-92-26, National Center for Earthquake Engineering Research, Buffalo, N.Y.
Yang, J. N., Li, Z., and Vongchavalitkul, S. (1994). “Generalization of optimal control theory: Linear and nonlinear control.” J. Eng. Mech., 120(2), 266–283.
Yang, J. N., Wu, J. C., Kawashima, K., and Unjoh, S. (1995). “Hybrid control of seismic-excited bridge structures.” Earthquake Eng. Struct. Dyn., 24(11), 1437–1451.
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© 2007 ASCE.
History
Received: Apr 19, 2005
Accepted: Dec 14, 2005
Published online: Feb 1, 2007
Published in print: Feb 2007
Notes
Note. Associate Editor: Satish Nagarajaiah
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