Effects of deterioration of isolators on the seismic failure modes of isolated bridges with reinforced concrete columns

• Matsuzaki Hiroshi

  東北大学　大学院工学研究科土木工学専攻

• Onodera Meguru

  東北大学　大学院工学研究科土木工学専攻

• Tsumura Takuto

  東北大学　大学院工学研究科土木工学専攻

• Suzuki Motoyuki

  東北大学名誉教授

Bibliographic Information

Other Title

• 免震支承の経年劣化が免震支承－RC橋脚系の地震時損傷モードに及ぼす影響に関する基礎的研究

Abstract

Rupture of isolators should be prevented in view of post-earthquake repair time and cost. In this study, effects of strength ratio variation between isolators and reinforced concrete columns due to deterioration of isolators on the seismic failure modes of isolated bridges were investigated considering uncertainties in the material and mechanical properties of isolated bridges. As a result, it was shown that it is important to set the strength at hardening initiation of the isolator to be larger than the ultimate strength of the column in the seismic design to maintain seismic safety of bridges with deteriorated isolators. It was also indicated that rupture strain of isolators is a major uncertainty in evaluating the ultimate failure modes of bridges with deteriorated isolators.

Journal

• Journal of Structural Engineering, A

  Journal of Structural Engineering, A 63A (0), 397-410, 2017

  Japan Society of Civil Engineers

Keywords

• isolated bridge
• strength ratio
• deterioration
• seismic failure mode

Details

• CRID: 1390282763014265856
• NII Article ID: 130007395180
• DOI: 10.11532/structcivil.63a.397
• ISSN: 1881820X
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • Crossref
• Abstract License Flag: Disallowed