Physical-Parameter Identification of Base-Isolated Buildings Using Backbone Curves
Publication: Journal of Structural Engineering
Volume 135, Issue 9
Abstract
In this paper, a simplified system identification procedure is developed to investigate the dynamic characteristics of base-isolated buildings equipped with lead-rubber bearings (LRBs). The multistory superstructure is assumed to be linear on the account of substantial reduction in seismic forces due to the installation of LRBs for which a bilinear hysteretic model is considered. The hysteretic model is in turn characterized by a backbone curve by which the multivalued restoring force is transformed into a single-valued function. With the introduction of backbone curves, the system identification analysis of inelastic structures is simplified to a large extent. The proposed algorithm extracts individually the physical parameters of each floor and the bearing system that are considered useful information in the structural health monitoring. A numerical example is conducted to demonstrate the feasibility of using the proposed technique for physical-parameter identification of partially inelastic based-isolated buildings.
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Acknowledgments
This work is partially supported by the National Science Council of the Republic of China (Contract No. UNSPECIFIEDNSC96-2625-Z-344–001).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 9 • September 2009
Pages: 1107 - 1114
Copyright
© 2009 ASCE.
History
Received: Jun 10, 2008
Accepted: Feb 27, 2009
Published online: Mar 26, 2009
Published in print: Sep 2009
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