Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation

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dc.contributor.authorXu, C.
dc.contributor.authorChase, Geoff
dc.contributor.authorRodgers, G.W.
dc.date.accessioned2016-02-01T02:41:03Z
dc.date.available2016-02-01T02:41:03Z
dc.date.issued2015en
dc.description.abstractThis 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 eventsen
dc.identifier.citationXu, C., Chase, J.G., Rodgers, G.W. (2015) Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation. Shock and Vibration, 2015, pp. 193136, 12pp.en
dc.identifier.doihttps://doi.org/10.1155/2015/193136
dc.identifier.urihttp://hdl.handle.net/10092/11744
dc.language.isoen
dc.publisherUniversity of Canterbury. Mechanical Engineeringen
dc.rights.urihttps://hdl.handle.net/10092/17651
dc.subjectstructural health monitoringen
dc.subjectnonlinear regressionen
dc.subjecthysteresis loopsen
dc.subjectdamage identificationen
dc.subjectsystem identificationen
dc.subject.anzsrcFields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineeringen
dc.subject.anzsrcFields of Research::40 - Engineering::4005 - Civil engineering::400510 - Structural engineeringen
dc.titleNonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitationen
dc.typeJournal Article
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