Hybrid Control of Seismic-Excited Bridge Structures Using Variable Dampers

by J. N. Yang, Univ of California, Irvine, United States,
Z. Li, Univ of California, Irvine, United States,
S. Vongchavalitkul, Univ of California, Irvine, United States,

Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation


A method of control for seismic-excited buildings or bridge structures using variable dampers is presented. The control method is based on the theory of variable structure system (VSS) or the sliding mode control (SMC) and the earthquake ground motion is taken into account in the design of the controllers. A simulation study using a continuous girder bridge is conducted to examine the effectiveness of the control algorithm in reducing both the absolute acceleration of the bridge girder and the relative displacement between the girder and the supports. Simulation results indicate that the performance of the control method presented is excellent.

Subject Headings: Hybrid methods | Structural control | Seismic tests | Seismic effects | Bridges | Damping | Bridge design | Equations of motion

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