The Strength Reduction Factors for Seismic-Isolated Bridges Characterized by SDOF Bilinear Systems in Far-Fault Areas

Yi Feng Wu, Hao Wang, Ai Qun Li, Ben Sha, Kai Ming Bi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

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 languageEnglish
Pages (from-to)404-421
Number of pages18
JournalJournal of Earthquake Engineering
Volume23
Issue number3
DOIs
Publication statusPublished - 16 Mar 2019
Externally publishedYes

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

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