Identification and Damage Detection in Structures Subjected to Base Excitation |
| |
Authors: | G Fraraccio A Brügger R Betti |
| |
Institution: | (1) Dipartimento di Ingegneria Strutturale e Geotecnica, Università degli Studi di Roma La Sapienza, Via Eudossiana, 18, 00184 Rome, Italy;(2) Department of Civil Engineering and Engineering Mechanics, Columbia University, 610 S. W. Mudd Building, 500 West 120th Street, New York, NY 10027, USA |
| |
Abstract: | This paper presents an experimental study of different algorithms for the health monitoring of frame structures subjected
to base excitation (e.g. earthquake ground motion). These algorithms use only the acceleration time histories of the input
and of the response output and are tested for the identification of the dynamic characteristics of the structure (natural
frequencies and damping ratios) and for detecting and quantifying any possible structural damage that occurs in the frame.
Three algorithms were considered: (1) a frequency domain decomposition algorithm, (2) a time domain Eigensystem Realization
Algorithm together with Observer Kalman Identification algorithm, and (3) a subsequent physical parameter identification algorithm
(MLK). Through extensive experimental testing of a four-story steel frame model on a uniaxial shake table, the performance
of the various methods as well as the inherent complications of physical instrumentation and testing are explored. |
| |
Keywords: | System identification Damage detection Health monitoring ERA OKID FDD Experimental Shake table |
本文献已被 SpringerLink 等数据库收录! |
|