APPLICATIONS OF SOME SEMIACTIVE CONTROL SYSTEMS TO BENCHMARK CABLE-STAYED BRIDGE

A benchmark cable-stayed bridge (CSB) model was recently developed for the control community as a test bed to evaluate the performance of various strategies for the control of CSBs during earthquakes. In this paper, the effectiveness and performance of some semiactive and passive control systems for this benchmark CSB are evaluated and discussed. The semiactive control systems considered include the semiactive stiffness damper and the semiactive friction damper. Cases of passive linear and nonlinear viscous fluid dampers are also investigated and presented. The performance of semiactive control systems is evaluated using effective control strategies and compared with that of the sample active control system using actuators. Results clearly indicate that the displacement of the bridge deck as well as the shear and moment at the base of the towers can be reduced substantially by installing these passive and semiactive protective devices. It is shown that semiactive and passive devices studied herein are effective in reducing the peak response quantities of the bridge to a level comparable to that of the sample active controller under similar force constraints.

Language

  • English

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  • Accession Number: 00960569
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 10 2003 12:00AM