Integrating Semi-Active Structural Control and Earthquake Early Warning


Abstract eng:
This paper presents a methodology that combines the use of magnetorheological (MR) dampers together with an earthquake early warning (EEW) system to minimize the losses in a structure about to be struck by an incoming ground motion. MR dampers can generate relatively large controllable damping forces by tuning the viscosity of an MR fluid through a control voltage. Their mechanical simplicity, fast response time, and low electric power requirements make them attractive for potential applications in earthquake engineering, particularly when combined with EEW. In this paper, a control algorithm is developed to determine the command voltage of the MR damper based on the expected ground shaking predicted by an EEW system. A general framework is introduced that develops a performance-based (i.e., loss-based) control algorithm for semi-active devices combined with an EEW system. A simplified story-based buildingspecific component-based loss estimation is used in the proposed framework, combining real-time, EEW-based seismic hazard, nonlinear dynamic structural simulation, damage fragility and loss. For illustrative purposes, the control algorithm is implemented on a generic three-story building structure equipped with a small-scale MR damper prototype. Results reveal that the developed EEW-based control algorithm can effectively reduce the expected loss of the considered case-study structure.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



Record appears in:



 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4705.:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)