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.
Original language | English |
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Pages (from-to) | 1107-1114 |
Number of pages | 8 |
Journal | Journal of Structural Engineering |
Volume | 135 |
Issue number | 9 |
DOIs | |
State | Published - 28 Aug 2009 |
Keywords
- Base isolation
- Curvature
- Hysteresis
- Identification
- Inelasticity
- Parameters