Modal parameter identification of civil engineering structures under operational conditions

Hasan S. Ulusoy; Maria Q. Feng

doi:10.1117/12.881452

19 April 2011 Modal parameter identification of civil engineering structures under operational conditions

Hasan S. Ulusoy, Maria Q. Feng

Proceedings Volume 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011; 79832Q (2011) https://doi.org/10.1117/12.881452
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

This paper deals with the realization of finite dimensional, linear, time-invariant models of structural systems in the state space description from the response (output) of the system. The theory and and underlying principles of two stochastic system identification algorithms are first described. The applications of the algorithms to two civil engineering structures follow the theory. Ambient vibration data collected from a building and a bridge, both are permanently instrumented by accelerometer networks, are used to derive the models. The vibration characteristics, i.e., the frequencies, damping ratios, and associated mode shapes, of the structures are then retrieved from the models. The stochastic system identification algorithms prove to be very effective in identifying the vibration characteristics of the structures.

Citation Download Citation

Hasan S. Ulusoy and Maria Q. Feng "Modal parameter identification of civil engineering structures under operational conditions", Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79832Q (19 April 2011); https://doi.org/10.1117/12.881452

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