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Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation
Joint Authors
Xu, C.
Rodgers, Geoffrey W.
Chase, J. Geoffrey
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-07-26
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
This paper presents a health monitoring method using measured hysteretic responses.
Acceleration and infrequently measured displacement are integrated using a multirate Kalman filtering method to generate restoring force-displacement hysteresis loops.
A linear/nonlinear regression analysis based two-step method is proposed to identify nonlinear system parameters.
First, hysteresis loops are divided into loading/unloading half cycles.
Multiple linear regression analysis is applied to separate linear and nonlinear half cycles.
Preyielding stiffness and viscous damping coefficient are obtained in this step and used as known parameters in the second step.
Then, nonlinear regression analysis is applied to identified nonlinear half cycles to yield nonlinear system parameters and two damage indicators: cumulative plastic deformation and residual deformation.
These values are closely related to structural status and repair costs.
The feasibility of the method is demonstrated using a simulated shear-type structure with different levels of added measurement noise and a suite of ground motions.
The results show that the proposed SHM method effectively and accurately identifies physical system parameters with up to 10% RMS added noise.
The resulting damage indicators can robustly and clearly indicate structural condition over different earthquake events.
American Psychological Association (APA)
Xu, C.& Chase, J. Geoffrey& Rodgers, Geoffrey W.. 2015. Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation. Shock and Vibration،Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1078001
Modern Language Association (MLA)
Xu, C.…[et al.]. Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation. Shock and Vibration No. 2015 (2015), pp.1-12.
https://search.emarefa.net/detail/BIM-1078001
American Medical Association (AMA)
Xu, C.& Chase, J. Geoffrey& Rodgers, Geoffrey W.. Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation. Shock and Vibration. 2015. Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1078001
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1078001