Seismic Performance Assessment of a RC Bridge Retrofitted with SCEBs Under Near-Fault Pulse-Like Ground Motions

ABSTRACT

A novel self-centering energy dissipation brace (SCEB) was developed to enhance the seismic resilience of bridges. In this paper, the replaceable SCEBs are installed between the double-column bent transversely and at the abutment longitudinally. Taking both the seismic safety and resilience into consideration, the seismic performance of bridges retrofitted by braces under near-fault (NF) pulse-like ground motions was evaluated by the probabilistic approach. Results show that the original and retrofitted bridges exhibit higher damage probabilities under NF pulse-like ground motions. The bridges retrofitted with SCEBs exhibit better seismic resilience than the bridges with buckling restrained braces when intensity measure increases.

KEYWORDS:

• Bridge with double-column bent
• SCEB
• seismic resilience
• near-fault pulse-like ground motions
• seismic performance assessment

Acknowledgements

The authors would like to acknowledge the support from National Natural Science Foundation of China (NSFC) (No. 51838010, 52108430), China Postdoctoral Science Foundation (No. 2021M693545, No. 2022T150732), and Beijing Municipal Education Commission (No. IDHT20190504, KZ202010005001) for carrying out this research.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the Beijing Municipal Education Commission [IDHT20190504, KZ202010005001]; China Postdoctoral Science Foundation [2021M693545, 2022T150732]; National Natural Science Foundation of China [51838010,51908325,52108430].