Identification of linear structural systems using earthquake-induced vibration data

✍ Scribed by Luş, H.; Betti, R.; Longman, R. W.

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 219 KB
• Volume: 28
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(199911)28:11<1449::aid-eqe881>3.0.co;2-5

✦ Synopsis

This paper addresses the issue of system identi"cation for linear structural systems using earthquake induced time histories of the structural response. The proposed methodology is based on the Eigensystem Realization Algorithm (ERA) and on the Observer/Kalman "lter IDenti"cation (OKID) approach to perform identi"cation of structural systems using general input}output data via Markov parameters. The e$ciency of the proposed technique is shown by numerical examples for the case of eight-storey building "nite element models subjected to earthquake excitation and by the analysis of the data from the dynamic response of the Vincent-Thomas cable suspension bridge (Long Beach, CA) recorded during the Whittier and the Northridge earthquakes. The e!ects of noise in the measurements and of inadequate instrumentation are investigated. It is shown that the identi"ed models show excellent agreement with the real systems in predicting the structural response time histories when subjected to earthquake-induced ground motion.