Abstract
This article presents a statistical study on strength reduction factors for seismic-isolated bridges in far-fault areas. 1410 ground motions are selected and modified to be compatible with the recommended response spectra. Then, they are divided into 60 groups to investigate the effects of PGA/PGV ratios, soil conditions and post-to-pre-yield stiffness ratio. Results show that reduction factors are significantly affected by the PGA/PGV ratio, while the latter two items are not as important as the first one. Finally, an improved equation to estimate the reduction factor is proposed, and the accuracy of the equation is verified by additional records.
Original language | English |
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Pages (from-to) | 404-421 |
Number of pages | 18 |
Journal | Journal of Earthquake Engineering |
Volume | 23 |
Issue number | 3 |
DOIs | |
Publication status | Published - 16 Mar 2019 |
Externally published | Yes |
Keywords
- Regression Analysis
- Response Spectra
- SDOF System
- Seismic-Isolated Bridge
- Strength Reduction Factor
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Geotechnical Engineering and Engineering Geology