Identification of Instantaneous Stiffness and Modal Damping Ratio in a Reinforcement Concrete Bridge Column Subjected To Seismic Loads
Abstract eng: An iterative unscented Kalman filter (UKF) combined with a piece-wise nonlinear model is proposed to estimate instantaneous stiffness and damping ratios during the response of the structure to the earthquake motion. The methodology is evaluated based on simulated and experimental data collected on a real-scale RC column test performed at the NEES Large High Performance Outdoor Shake Table. Results show that the identified instantaneous stiffness and damping ratios are in close agreement with the actual stiffness and total hysteretic damping exhibited by the structure, respectively. Moreover, it was found that the maximum values of damping and minimum values of stiffness reached by the structure during its dynamic response are better indicator of damage than post-event identified properties.
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.
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Record created 2017-01-18, last modified 2017-01-18
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